# Best Lactose-Free Protein Powder > The best lactose free protein powder picks, from labeled lactose-free whey isolates to truly dairy-free plant and egg options, ranked on label and testing. - **URL**: https://www.best-proteinpowder.com/best-lactose-free-protein-powder/ - **Updated**: 2026-11-08 - **Author**: [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/) - **Publisher**: [Best Protein Powder](https://www.best-proteinpowder.com/) --- Eight powders for people who cannot handle lactose, split into the two groups that matter: whey isolates that keep lactose close to zero, and dairy-free powders with no milk in them at all. **How we rank:** We judge every powder on the label, not the marketing: protein per scoop, cost per 25 g of protein, the full ingredient list and third-party testing. No paid placements, and commission never sets a ranking. [Read our methodology](https://www.best-proteinpowder.com/how-we-test/) If lactose is your only problem, a whey protein isolate is usually the best lactose-free protein powder you can buy: it keeps whey's taste and muscle-building profile while filtering most of the milk sugar out, and a few, like Isopure Zero Carb, say lactose-free on the label. If you have a milk allergy, avoid dairy for other reasons, or react even to isolate, skip whey entirely and choose a dairy-free powder made from pea, a plant blend or egg white. Those are different problems with different answers, and most of the mistakes people make in this aisle come from treating them as one. ## Our Top Picks | Award | Product | Why | | --- | --- | --- | | Best Labeled Lactose-Free Whey | [Isopure Zero Carb Whey Protein Isolate](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#isopure-zero-carb) | The first whey to try if lactose is your only problem. | | Best Certified Isolate | [Transparent Labs Grass-Fed Whey Protein Isolate](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#transparent-labs-grass-fed-whey-protein-isolate) | The best-documented isolate for lactose-sensitive lifters who will pay more. | | Best Hydrolyzed Isolate | [Dymatize ISO100 Hydrolyzed Whey Isolate](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#dymatize-iso100-hydrolyzed) | A reliable, widely available isolate that most lactose-intolerant lifters tolerate. | | Best Dairy-Free for Athletes | [Garden of Life Sport Organic Plant-Based Protein](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#garden-of-life-sport-organic-plant-protein) | The dairy-free powder to choose if you are tested or train hard. | | Best Non-Dairy for Taste | [Vega Sport Premium Protein](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#vega-sport-premium-protein) | A certified non-dairy shake that most people can drink in water. | | Best Grocery-Store Dairy-Free | [Orgain Organic Protein Plant-Based Powder](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#orgain-organic-protein-plant-based) | An easy, organic dairy-free shake, but light on protein per serving. | | Best Budget Dairy-Free | [Naked Pea Protein](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#naked-nutrition-naked-pea) | The cleanest, cheapest dairy-free base if you blend your shakes. | | Best Dairy-Free Animal Protein | [Naked Egg White Protein](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/#naked-nutrition-naked-egg) | The dairy-free pick for people who want animal protein and no legumes. | ## 1. The Quick Answer: Lactose-Free Picks Compared Here is the short version before the detail. If you tolerate dairy protein but not milk sugar, start with Isopure Zero Carb, which is labeled lactose-free, or Transparent Labs Grass-Fed Whey Isolate if you want an independent certification and no artificial sweetener. If you need no dairy at all, Garden of Life Sport and Vega Sport are the certified plant options for training, Naked Pea is the budget single-ingredient pick, and Naked Egg is the choice for people who want an animal protein without milk. | Product | Protein / scoop | Calories | Sugar | Price tier | Certification | | --- | --- | --- | --- | --- | --- | | Isopure Zero Carb | About 25 g | About 100-110 | 0 g | Mid | Check certifier databases | | Transparent Labs Whey Isolate | 28 g | About 120-130 | About 1 g | Premium | Informed Choice (brand) | | Dymatize ISO100 | About 25 g | About 110-120 | About 1 g | Mid | Banned-substance tested (brand) | | Garden of Life Sport Plant | About 30 g | About 170-180 | No added sugar | Premium | NSF Certified for Sport (brand) | | Vega Sport Premium | About 30 g | About 160-170 | About 1 g | Premium | NSF Certified for Sport (brand) | | Orgain Organic Plant | About 21 g | About 150 | 0-1 g | Mid | USDA Organic | | Naked Pea | About 27 g | About 120 | Unsweetened | Budget | None confirmed | | Naked Egg | About 25 g | About 110 | Unsweetened | Premium | None confirmed | All figures are per the label at the time of writing and vary by flavor and serving size. Two scoops make a serving for some of the plant powders, which is why their calories run higher. Certification status changes, so look up the exact product and flavor in the NSF or Informed Choice database before you rely on it. Price tier reflects typical cost per 25 g of protein at mainstream retailers, not the sticker price of the tub. One more thing worth knowing up front: none of the three whey isolates is safe for a milk allergy. They are low in lactose, the sugar, but they are made of milk protein, which is what the immune system reacts to. If that is your situation, go straight to picks four through eight. ## 2. The Best Lactose-Free Protein Powders, Ranked The first three picks are whey isolates for people with lactose intolerance who still want dairy protein. The last five contain no milk at all and suit a milk allergy, a vegan diet or anyone who reacts to isolate. Rankings come from label analysis, certification status and price tier, not from our own lab or taste tests. Figures are per the label at the time of writing and vary by flavor, so check the tub you buy. ### 1. Isopure Zero Carb Whey Protein Isolate **Award:** Best Labeled Lactose-Free Whey | **Type:** Whey protein isolate - **Protein / serving:** About 25 g (label) - **Calories:** About 100-110 - **Third-party tested:** Check certifier databases - **Best for:** Lactose intolerance, low-carb Isopure Zero Carb is the clearest lactose-free whey on the shelf: the brand describes it as lactose-free, and the label lists about 25 g of protein in roughly 100 to 110 calories with zero carbohydrate and zero sugar per scoop. The unflavored version is listed as whey isolate and soy lecithin only, which makes it the simplest test of whether dairy protein works for you. **Bottom line:** The first whey to try if lactose is your only problem. **Pros:** - Labeled lactose-free by the brand, with 0 g carbs and sugar per the label - About 25 g of protein in roughly 100-110 calories - Unflavored version has a two-ingredient list **Cons:** - Still a milk product, so not suitable for a milk allergy - Flavored versions use artificial sweetener, and the unflavored one contains soy lecithin - No NSF or Informed Choice listing we could confirm [Check price on Amazon](https://www.amazon.com/dp/B000E95HP0?tag=sktiger-20&linkCode=ll1) ### 2. Transparent Labs Grass-Fed Whey Protein Isolate **Award:** Best Certified Isolate | **Type:** Grass-fed whey protein isolate - **Protein / serving:** 28 g (label) - **Calories:** About 120-130 - **Third-party tested:** Informed Choice (brand) - **Best for:** Lactose-sensitive lifters Transparent Labs uses whey isolate as its only protein, sweetened with stevia rather than artificial sweetener, and delivers 28 g of protein per scoop with about 1 g of sugar per the label at the time of writing. The brand lists Informed Choice certification. It is not labeled lactose-free, but the isolate-only formula keeps lactose very low, and it suits lactose-sensitive lifters who want a documented product. **Bottom line:** The best-documented isolate for lactose-sensitive lifters who will pay more. **Pros:** - 28 g of protein per scoop, the highest of the whey picks - Informed Choice certified, per the brand - Stevia-sweetened with no artificial sweeteners or dyes **Cons:** - Premium price tier per 25 g of protein - Not explicitly labeled lactose-free - Stevia aftertaste bothers some buyers, per reviews [Check price on Amazon](https://www.amazon.com/dp/B0CQ32D39X?tag=sktiger-20&linkCode=ll1) ### 3. Dymatize ISO100 Hydrolyzed Whey Isolate **Award:** Best Hydrolyzed Isolate | **Type:** Hydrolyzed whey protein isolate - **Protein / serving:** About 25 g (label) - **Calories:** About 110-120 - **Third-party tested:** Banned-substance tested (brand) - **Best for:** Lactose-sensitive, flavor variety ISO100 is the benchmark hydrolyzed isolate. Per the label at the time of writing, a scoop delivers about 25 g of protein in 110 to 120 calories, with roughly 1 g of sugar and very little lactose or fat. The whey is partly pre-digested into smaller peptides, which some buyers say sits easier, and it comes in more flavors than any other pick here. **Bottom line:** A reliable, widely available isolate that most lactose-intolerant lifters tolerate. **Pros:** - About 25 g of protein with roughly 1 g of sugar per scoop - Hydrolyzed isolate that many buyers report as easy to digest - Wide flavor range and mid-tier price **Cons:** - Not labeled lactose-free, and still a milk product - Flavored versions use artificial sweeteners - Hydrolyzed whey can taste slightly bitter in unflavored form [Check price on Amazon](https://www.amazon.com/dp/B099J2SWXV?tag=sktiger-20&linkCode=ll1) ### 4. Garden of Life Sport Organic Plant-Based Protein **Award:** Best Dairy-Free for Athletes | **Type:** Organic plant protein blend - **Protein / serving:** About 30 g (2 scoops) - **Calories:** About 170-180 - **Third-party tested:** NSF Certified for Sport (brand) - **Best for:** Dairy-free athletes Garden of Life Sport delivers about 30 g of protein from an organic pea-led blend in a two-scoop serving, with NSF Certified for Sport and USDA Organic status per the brand at the time of writing. It contains no milk ingredients and no added sugar per retailer listings. It is the dairy-free pick for athletes who want a full protein dose and independent testing. **Bottom line:** The dairy-free powder to choose if you are tested or train hard. **Pros:** - About 30 g of protein per serving, a full leucine-matched dose - NSF Certified for Sport and USDA Organic, per the brand - No milk ingredients and no added sugar **Cons:** - Premium price tier per 25 g of protein - Two scoops per serving and about 170-180 calories - Thicker, earthier texture than whey, as buyers commonly report [Check price on Amazon](https://www.amazon.com/dp/B01N7DTD98?tag=sktiger-20&linkCode=ll1) ### 5. Vega Sport Premium Protein **Award:** Best Non-Dairy for Taste | **Type:** Plant protein blend - **Protein / serving:** About 30 g (label, varies by flavor) - **Calories:** About 160-170 - **Third-party tested:** NSF Certified for Sport (brand) - **Best for:** Post-workout, dairy-free Vega Sport blends pea with pumpkin seed, sunflower seed and alfalfa protein for about 30 g of protein per serving, with about 1 g of sugar and no added sugar per the US label at the time of writing. It is NSF Certified for Sport per the brand, and buyers commonly describe it as one of the more drinkable plant shakes in water. **Bottom line:** A certified non-dairy shake that most people can drink in water. **Pros:** - About 30 g of protein with about 1 g of sugar per serving - NSF Certified for Sport, per the brand - Buyers often rate it among the better-tasting plant proteins **Cons:** - Premium price tier per 25 g of protein - Contains stevia and, in some versions, xanthan gum - Calories and serving size vary between label versions [Check price on Amazon](https://www.amazon.com/dp/B016D9IGRA?tag=sktiger-20&linkCode=ll1) ### 6. Orgain Organic Protein Plant-Based Powder **Award:** Best Grocery-Store Dairy-Free | **Type:** Organic plant protein blend - **Protein / serving:** About 21 g (2 scoops) - **Calories:** About 150 - **Third-party tested:** USDA Organic; no sport certification confirmed - **Best for:** Casual dairy-free use Orgain is the dairy-free powder most people can find in a supermarket. Per the label at the time of writing, two scoops give about 21 g of protein from organic pea, brown rice and chia, at about 150 calories with 0 to 1 g of sugar. It is USDA Organic and vegan, and sweetened with erythritol and stevia in many flavors. **Bottom line:** An easy, organic dairy-free shake, but light on protein per serving. **Pros:** - Widely available and USDA Organic - No milk ingredients and 0 to 1 g of sugar per serving - Softer, sweeter taste than most plant powders, per buyers **Cons:** - Only about 21 g of protein in a two-scoop serving - Contains erythritol, gums and inulin fiber, which some sensitive stomachs dislike - No sport certification confirmed [Check price on Amazon](https://www.amazon.com/dp/B00J074W7Q?tag=sktiger-20&linkCode=ll1) ### 7. Naked Pea Protein **Award:** Best Budget Dairy-Free | **Type:** Single-ingredient pea protein isolate - **Protein / serving:** About 27 g (label) - **Calories:** About 120 - **Third-party tested:** No sport certification confirmed - **Best for:** Vegans, budget, smoothies Naked Pea has one ingredient, yellow pea protein, which the brand says is sourced from the United States and Canada. Per the label it delivers about 27 g of protein in roughly 120 calories with no sweetener, gums or flavorings. That makes it the cheapest and simplest way to get a dairy-free protein, and the easiest to blend into smoothies or baking. **Bottom line:** The cleanest, cheapest dairy-free base if you blend your shakes. **Pros:** - One ingredient, with no sweeteners, gums or flavorings - About 27 g of protein in roughly 120 calories - Budget-tier cost per 25 g of protein **Cons:** - Earthy taste and gritty texture in water, as buyers commonly report - No NSF or Informed Choice certification we could confirm - Pea is a legume, so it may not suit people with a legume or peanut allergy [Check price on Amazon](https://www.amazon.com/dp/B00NBIUGA2?tag=sktiger-20&linkCode=ll1) ### 8. Naked Egg White Protein **Award:** Best Dairy-Free Animal Protein | **Type:** Egg white protein - **Protein / serving:** About 25 g (2 scoops) - **Calories:** About 110 - **Third-party tested:** No sport certification confirmed - **Best for:** Dairy and legume sensitivity Naked Egg is dried egg white and nothing else in the unflavored version, per the brand. A two-scoop serving of about 31 g delivers about 25 g of protein in about 110 calories, fat-free and lactose-free. It suits people who want a complete animal protein without milk, or who react to pea and soy as well as dairy. **Bottom line:** The dairy-free pick for people who want animal protein and no legumes. **Pros:** - Single ingredient in the unflavored version - About 25 g of complete protein in about 110 calories - Free of dairy, legumes and soy **Cons:** - Premium price tier per 25 g of protein - Plain, slightly eggy taste and can foam when shaken - Not suitable for an egg allergy [Check price on Amazon](https://www.amazon.com/dp/B01E4XSABY?tag=sktiger-20&linkCode=ll1) ## 3. Lactose-Free vs Dairy-Free: Not the Same Label Lactose-free and dairy-free answer two different questions. Lactose-free means the milk sugar has been removed or broken down, which is what matters for lactose intolerance, a digestive problem caused by low levels of the lactase enzyme in the small intestine. Dairy-free means there is no milk-derived ingredient at all, which is what matters for a milk allergy, a vegan diet, or anyone who reacts to milk proteins themselves. A lactose-free whey isolate is still a dairy product. A dairy-free pea protein is lactose-free by default, because it never contained lactose in the first place. The distinction matters because the consequences are different. Lactose intolerance produces gas, bloating, cramps and loose stools a few hours after a dose, and the severity tracks how much lactose you ate. A milk allergy is an immune reaction to casein or whey proteins and can cause hives, vomiting, swelling or, in severe cases, anaphylaxis, even from small amounts. If you have been diagnosed with a milk allergy, a lactose-free claim tells you nothing useful, and you should be reading the allergen statement instead. In the US, milk is one of the major allergens that must be declared on the label. Then there is the word non-dairy, which is the most misleading of the three. In US labeling, non-dairy has a long history on products such as coffee creamers that still contain caseinate, a milk protein, with the label noting that it is a milk derivative. So people searching for the best non dairy protein powder should treat non-dairy as a marketing phrase and look for the absence of milk in the ingredient list and allergen statement, or for a vegan claim, which rules out every animal ingredient. In practice the decision is simple. If milk sugar is the problem, a good isolate gives you the most familiar taste and texture, and our [best whey protein isolate](https://www.best-proteinpowder.com/best-whey-protein-isolate/) guide ranks the full category. If milk itself is the problem, buy a powder with no milk ingredients and no milk allergen warning, and check the facility statement if your allergy is severe. ## 4. How Much Lactose Is in Whey Isolate? Whey protein comes off cheesemaking as a liquid that contains protein, lactose, fat and minerals. Filtration concentrates the protein. A whey protein concentrate is usually around 70 to 80 percent protein by weight, and the rest includes a meaningful share of lactose, commonly several percent of the powder. On a 30 g scoop that can mean one to a few grams of lactose, which is less than a glass of milk but enough to bother sensitive people, especially if they take two scoops a day. Whey protein isolate goes through further filtration, typically to 90 percent protein or more, and most of the remaining lactose and fat is removed along the way. A typical isolate scoop carries well under a gram of carbohydrate in total, and lactose is only part of that. That is why labels such as Isopure Zero Carb and Dymatize ISO100 list zero or around one gram of carbohydrate per serving. Hydrolyzed isolate, like ISO100, has also been partly broken down into smaller peptides, which some people find easier to digest, although the evidence for that is mostly anecdotal. How much lactose is too much varies widely. Research on lactose intolerance, including a US National Institutes of Health consensus review, found that most people with lactose intolerance can handle around 12 g of lactose, roughly a cup of milk, in one sitting with little or no symptoms, especially when taken with food. A well-made isolate sits far below that. That is why many lactose-intolerant lifters do fine on isolate, while the same person might struggle with a concentrate-based blend. Our [whey vs whey isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/) comparison covers the other trade-offs between the two. The catch is that not everyone who feels bad after whey is reacting to lactose. Large doses of protein taken fast, sugar alcohols, gums and added fibers can all cause similar symptoms. If an isolate still bothers you, the problem may be the other ingredients rather than the milk sugar, and an unflavored isolate or a dairy-free powder is the cleanest way to tell the difference. ## 5. Which Labels Actually Say Lactose-Free Plenty of whey isolates are low in lactose, but few say lactose-free on the tub. Isopure is the clearest example among the picks here: the brand describes Zero Carb as lactose-free on its product pages and packaging, and the unflavored version is listed as whey isolate and soy lecithin. Many other isolates, including ISO100 and Transparent Labs, are marketed toward lactose-sensitive buyers or describe themselves as low lactose without making the flat claim. That is a meaningful difference in tone but often not much difference in the tub. It helps to know that in the US there is no FDA definition for lactose-free. Some European countries use a threshold such as under 0.1 g of lactose per 100 g of product, but a US brand making the claim is largely setting its own standard. That is why the most reliable signal is the nutrition panel: total carbohydrate and total sugars of zero or close to it on an isolate mean there is very little room for lactose. A product that lists 3 to 5 g of sugar per scoop and contains whey concentrate is a different story, whatever the front of the tub says. ### Labels to read, in order Start with the ingredient list. Whey protein isolate as the only protein is good; whey protein concentrate, milk protein concentrate, milk solids or nonfat dry milk mean more lactose. Next, check total sugars, which on an unsweetened or sucralose-sweetened isolate should be close to zero. Then read the allergen statement, which will say contains milk on every whey product, lactose-free or not. Finally, for dairy-free powders, look for a may contain milk or shared facility line if your sensitivity is severe. ## 6. Lactase Enzymes and Lactase-Treated Products Lactase is the enzyme that splits lactose into glucose and galactose so your small intestine can absorb them. People with lactose intolerance produce less of it, which leaves lactose to reach the colon, where bacteria ferment it and produce gas. There are two ways to add lactase back: take it yourself as a tablet or drops, or buy a product the manufacturer has already treated with it. Both work on the same principle. Over-the-counter lactase tablets are a practical tool if you want to use a whey concentrate, a casein powder or a protein blend that contains milk. Take them with the first sip, not an hour before, because the enzyme only works while the lactose is passing through. Results vary with the dose of enzyme and the amount of lactose, so it takes some trial and error. Casein powders are a common case: they are filtered and fairly low in lactose, but not as low as isolate, and our [best casein protein powder](https://www.best-proteinpowder.com/best-casein-protein-powder/) guide covers how much tolerance varies. Some protein products are lactase-treated during manufacturing. Ultra-filtered milk shakes such as the fairlife range are the best-known example, and they are labeled lactose-free because the remaining milk sugar has been broken down. A few protein powders also add digestive enzymes, sometimes including lactase, to their blends. That can help, but an enzyme blend listed without amounts gives you no way to know how much lactase is in a scoop. For the ready-to-drink side, our [best protein drink](https://www.best-proteinpowder.com/best-protein-drink/) guide covers the lactose-free shakes. Lactase is not a fix for a milk allergy. It does nothing to milk proteins, and lactase-treated products still contain the full load of casein and whey. It also does not help with symptoms caused by sugar alcohols, gums or added fiber. If lactase tablets do not change how you feel after a shake, lactose probably was not the main problem. ## 7. Best Non-Dairy Protein Powder Options by Source When you take milk off the table, the choice comes down to protein source. Pea protein isolate is the most common base: it is high in protein per calorie, inexpensive, and rich in lysine, with lower methionine than dairy. A straight pea isolate like Naked Pea is about as simple as protein powder gets. Our [best pea protein powder](https://www.best-proteinpowder.com/best-pea-protein-powder/) guide covers the single-source options and how much to take per shake. Plant blends combine pea with rice, pumpkin seed, sunflower seed or other sources to round out the amino acid profile and improve taste. Garden of Life Sport and Vega Sport both deliver around 30 g of protein per serving, which matches the leucine of a typical whey scoop more closely, and both have NSF Certified for Sport status per the brands. Orgain is the familiar grocery-store blend with organic certification and a softer, sweeter taste. The full field is ranked in our [best plant-based protein powder](https://www.best-proteinpowder.com/best-plant-based-protein-powder/) guide. Egg white protein is the main dairy-free animal option. It is a complete, highly digestible protein with no lactose and no fat, and it suits people who want to avoid both dairy and legumes. It is more expensive than pea per gram of protein and tends to taste plain, but it is a useful option for anyone who reacts to pea or soy. Beef protein isolate is the other dairy-free animal source and is covered in our [best beef protein powder](https://www.best-proteinpowder.com/best-beef-protein-powder/) guide. Soy protein isolate is another good dairy-free choice with a complete amino acid profile, though many shoppers avoid it for allergy or personal reasons. Whatever source you choose, plant proteins tend to carry more heavy metals than dairy because plants pull them from soil, so it is worth favoring brands with third-party testing. Our [is protein powder safe](https://www.best-proteinpowder.com/is-protein-powder-safe/) guide explains what the testing does and does not cover. ## 8. How We Picked We ranked these powders on label analysis, published certification status and typical price tier. We did not run our own lab tests or tasting panels, and nothing on this page should be read as if we did. Where we mention taste, mixing or digestion, we are summarizing what buyers commonly report. Our [how we test](https://www.best-proteinpowder.com/how-we-test/) page explains the method in full. For the whey picks, the first filter was protein source: whey isolate or hydrolyzed isolate only, with no concentrate or milk protein blend that would add lactose. We then looked at total carbohydrate and sugar per serving as a proxy for remaining lactose, and favored products that state lactose-free or are positioned for lactose-sensitive buyers. For the dairy-free picks, we required no milk ingredients at all and looked for at least 20 g of protein per serving. Certification counted heavily. NSF Certified for Sport and Informed Choice both test for banned substances, and NSF also checks that the label matches what is in the tub and screens for contaminants. That matters more for plant powders, which tend to test higher for heavy metals. We also favored shorter ingredient lists, because a powder with fewer additives makes it easier to tell whether a reaction comes from the protein or from something else. Finally we considered price per 25 g of protein rather than price per tub, because a cheap tub with a small scoop is often not cheap. Prices change often, so we use budget, mid and premium tiers. Every pick has real drawbacks, listed on its card, and none is the right choice for everyone. ## 9. How to Choose for Your Level of Sensitivity If you can drink a latte without trouble but a whey concentrate shake leaves you bloated, you are probably mildly lactose intolerant and any of the three isolates should work. Start with a single scoop mixed with water, not milk, and see how you feel over the next few hours. If that works, you can stick with the isolate whose taste and price you prefer. If even a small amount of dairy causes symptoms, try Isopure Zero Carb unflavored first, because it has the shortest ingredient list among the whey picks and a lactose-free claim. If that still bothers you, switch to a dairy-free powder rather than buying a second whey isolate. At that point lactose is either not the cause or you are sensitive enough that dairy protein is not worth the risk. If you have a milk allergy, skip the whey section entirely, choose a dairy-free powder and read the facility statement. People with severe allergies should talk to their allergist about shared-facility risk, and anyone with a medical condition, pregnancy or medications should check with a doctor or registered dietitian before adding a supplement. For vegans, Naked Pea is the budget pick and Garden of Life Sport or Vega Sport the certified training picks. Last, think about how you will drink it. Isolates mix thin and clean in water. Plant blends are thicker and earthier and taste better in a smoothie, which our [best protein powder for smoothies](https://www.best-proteinpowder.com/best-protein-powder-for-smoothies/) guide covers. Unflavored options, including Naked Pea and Naked Egg, are the most flexible for cooking, oats and coffee, and the [best unflavored protein powder](https://www.best-proteinpowder.com/best-unflavored-protein-powder/) guide covers more of them. ## 10. Common Mistakes to Avoid ### Treating lactose-free as milk-free A lactose-free whey isolate is still made of milk protein. If you have a milk allergy, the lactose claim is irrelevant and the product is not safe. Read the allergen statement, which will say contains milk on every whey product, and choose a powder with no milk ingredients at all. ### Trusting the word non-dairy Non-dairy is a marketing phrase, not a guarantee, and in US labeling it has been used on products that contain caseinate, a milk protein. Look for the absence of milk in the ingredient list and allergen line, or a vegan claim, rather than relying on the front of the tub. ### Buying a blend that contains concentrate Many popular whey powders blend isolate with concentrate, which brings back the lactose you were trying to avoid. If the ingredient list starts with whey protein concentrate or a protein blend, it is not an isolate, whatever the tub says about lean or pure. ### Blaming lactose for every symptom If an isolate still bothers you, the cause may be sugar alcohols, gums, inulin or simply a large dose taken fast. Try an unflavored isolate or a single-ingredient dairy-free powder before you conclude that all whey is off limits. ### Mixing a lactose-free powder with regular milk A cup of regular milk carries roughly 12 g of lactose, far more than any isolate. Mixing your lactose-free powder into it undoes the point. Use water, a lactose-free milk or a plant milk if you are sensitive. ## 11. Frequently Asked Questions ### What is the best lactose-free protein powder? For people with lactose intolerance who tolerate dairy protein, a whey isolate such as Isopure Zero Carb, which is labeled lactose-free, is usually the best choice. For anyone who needs to avoid milk entirely, a dairy-free powder such as Garden of Life Sport, Vega Sport or Naked Pea is the better pick. The right answer depends on whether lactose or milk protein is the problem. ### Is whey protein isolate lactose-free? Most whey isolates are very low in lactose, typically well under a gram per scoop, but not all are labeled lactose-free. Isopure Zero Carb carries the claim; others such as ISO100 are simply low in carbohydrate and sugar. Most people with lactose intolerance tolerate isolate well, but very sensitive people may still react, so start with a single scoop in water. ### What is the best dairy-free protein powder? For training, Garden of Life Sport and Vega Sport are strong dairy-free choices because they deliver about 30 g of protein and carry NSF Certified for Sport status per the brands. Naked Pea is the budget single-ingredient pick, and Naked Egg is the option for people who want animal protein without milk. Check the allergen statement if your sensitivity is severe. ### What is the best non-dairy protein powder? Treat non-dairy as a marketing phrase and look for products with no milk ingredients at all. Plant blends such as Vega Sport and Garden of Life Sport, single-source pea isolates like Naked Pea, and egg white powders all qualify. A vegan label is the simplest way to confirm there is no milk-derived ingredient in the tub. ### Can I take lactase with protein powder? Yes. Over-the-counter lactase tablets or drops can help you tolerate a whey concentrate, casein or a blend containing milk. Take the enzyme with the first sip so it works while the lactose passes through. Lactase does not help with a milk allergy, and it will not fix symptoms caused by sugar alcohols, gums or added fiber. ### Does lactose-free protein powder still contain milk? Lactose-free whey and casein products still contain milk proteins, and the allergen statement will say contains milk. Only a dairy-free product, such as a plant or egg white powder, is free of milk. If you have a diagnosed milk allergy, talk to your allergist or doctor about which products and facilities are safe for you. ### Is casein protein lactose-free? Casein powders are filtered and fairly low in lactose, often a few grams of carbohydrate per serving, but they are not as low as whey isolate and are rarely labeled lactose-free. Many lactose-intolerant people tolerate a normal serving, especially with a lactase tablet. If you are very sensitive, an isolate or a dairy-free powder is the safer starting point. ## Related Protein Guides - [Best Whey Protein Isolate](https://www.best-proteinpowder.com/best-whey-protein-isolate/): The full ranking of low-lactose whey isolates, by certification and cost per 25 g. - [Best Plant-Based Protein Powder](https://www.best-proteinpowder.com/best-plant-based-protein-powder/): Dairy-free blends and single-source plant powders, ranked. - [Whey vs Whey Isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/): Why isolate carries so much less lactose than concentrate, and when it is worth paying for. ## The Bottom Line Lactose intolerance and a milk allergy need different products. If milk sugar is the problem, a whey isolate like Isopure Zero Carb or Transparent Labs keeps lactose close to zero while giving you the taste and protein quality of whey. If milk itself is the problem, choose a dairy-free powder and read the allergen statement rather than the front of the tub. Start with one scoop in water, change one variable at a time, and if symptoms persist on a clean isolate or a single-ingredient plant powder, talk to a doctor or registered dietitian before you assume protein powder is the cause. ## More in Specialty Protein Guides in this category that pair with what you just read. - [Best Gluten-Free Protein Powder](https://www.best-proteinpowder.com/best-gluten-free-protein-powder/) - [Best Whey Protein Isolate](https://www.best-proteinpowder.com/best-whey-protein-isolate/) - [Best Plant-Based Protein Powder](https://www.best-proteinpowder.com/best-plant-based-protein-powder/) - [Best Protein Powder for Sensitive Stomach](https://www.best-proteinpowder.com/best-protein-powder-for-sensitive-stomach/) About the Author [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/), Supplements Desk The editorial team reads the label, the certificate and the price per gram of protein before a powder gets near a ranking -- and says plainly when a cheaper tub does the same job. [Full profile](https://www.best-proteinpowder.com/authors/editorial-team/) | [How we test](https://www.best-proteinpowder.com/how-we-test/)