# Best Casein Protein Powder > The best casein protein powder picks, all micellar, ranked on protein per scoop, testing and cost per 25 g, plus what the bedtime casein research really shows. - **URL**: https://www.best-proteinpowder.com/best-casein-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/) --- Six micellar casein powders ranked on protein per scoop, independent testing and cost per 25 g, with an honest read of what the before-bed studies do and do not prove. **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/) Casein is the slow half of milk protein, and it has one genuinely useful trick: a shake before bed keeps amino acids trickling into your blood for hours while you sleep. The research says that helps mostly by adding protein to your day, not by unlocking extra gains on its own. So the best casein is simply the one that gives you the most clean, tested protein per dollar, in a texture you will actually drink at night. ## Our Top Picks | Award | Product | Why | | --- | --- | --- | | Best Overall | [Optimum Nutrition Gold Standard 100% Casein](https://www.best-proteinpowder.com/best-casein-protein-powder/#optimum-nutrition-gold-standard-100-casein) | The safe, widely available default casein for a bedtime shake or protein pudding. | | Best Certified Flavored | [Dymatize Elite Casein](https://www.best-proteinpowder.com/best-casein-protein-powder/#dymatize-elite-casein) | The flavored casein to buy if you want a certification behind it at a mainstream price. | | Best Unflavored | [Naked Casein Micellar Casein Protein](https://www.best-proteinpowder.com/best-casein-protein-powder/#naked-nutrition-naked-casein) | The pick for anyone who wants pure micellar casein to flavor and cook with themselves. | | Best Premium | [Transparent Labs Grass-Fed Casein Protein](https://www.best-proteinpowder.com/best-casein-protein-powder/#transparent-labs-grass-fed-casein-protein) | The casein to buy if you want grass-fed sourcing and published testing and accept the premium. | | Best Budget | [Nutricost Casein Protein Powder](https://www.best-proteinpowder.com/best-casein-protein-powder/#nutricost-casein-protein) | The best-value casein if you want plain micellar casein in bulk and do not need certification. | | Best Lower-Calorie Scoop | [NOW Sports Micellar Casein (Unflavored)](https://www.best-proteinpowder.com/best-casein-protein-powder/#now-sports-micellar-casein) | A cheap, plain casein for cooking and puddings; double the scoop for a bedtime dose. | ## 1. What Casein Is, and Why Micellar Matters Cow's milk protein is roughly 80% casein and 20% whey. When milk is turned into cheese, the casein forms the curd and the whey drains off as liquid, which is why whey powder is cheap and plentiful while casein powders are a smaller category. Casein exists in milk as tiny clusters called micelles, bundles of protein held together with calcium and phosphate. Micellar casein is casein separated from milk while keeping those micelles largely intact, typically by filtering skim milk through membranes that hold back the large micelles and let lactose, minerals and whey proteins pass. That gentle process matters, because the intact micelle is what gives casein its slow-digesting behaviour. In the acidic environment of the stomach, micellar casein clots into a soft gel, which empties into the small intestine gradually rather than all at once. The other form you will see on labels is calcium caseinate or sodium caseinate. Caseinates are made by acidifying milk to precipitate casein and then neutralising it with an alkali, which breaks up the micelle structure. They mix more easily and are common in ready-to-drink shakes and blended powders, but they are generally considered less slow-digesting than micellar casein. If slow release is the reason you are buying casein, micellar casein should be the first ingredient on the label. Micellar casein also carries a lot of calcium. NOW's unflavored micellar casein, for example, lists about 324 mg of calcium per 24 g scoop, roughly a quarter of the daily value. That is a small bonus rather than a reason to buy, but it is a real difference from whey isolate, which contains little calcium. Texture is the trade-off. Because micellar casein thickens as it hydrates, it mixes heavier than whey and can clump in a shaker bottle, which is one of the most common buyer complaints across every brand in this guide. Mixing with a blender or a little more liquid solves most of it, and some people deliberately use less liquid to make a spoonable protein pudding. ## 2. What the Before-Bed Research Actually Shows The bedtime-casein idea comes mainly from Luc van Loon's group at Maastricht University. In a 2012 study, sixteen young men did an evening resistance-training session and then drank 40 g of casein about 30 minutes before sleep, or a placebo. The casein was digested and absorbed normally overnight, raised whole-body protein synthesis and improved overnight protein balance. Mixed muscle protein synthesis was about 22% higher with casein, but that result was only borderline statistically significant. Later work firmed up the dose question. A 2017 trial in 48 older men, average age around 72, compared 40 g of casein, 20 g of casein, 20 g of casein with added leucine, and a placebo before sleep. The authors concluded that 40 g increased overnight myofibrillar protein synthesis, and reviews by the same group have since suggested that around 40 g is needed for a robust overnight effect, with prior exercise helping more of that protein end up in muscle. The best-known long-term trial, published by Snijders and colleagues in 2015, put 44 young men on a 12-week lifting programme and gave half of them a nightly drink with roughly 30 g of casein, while the other half got an energy-free placebo. The casein group gained more strength and more muscle size. The catch is that total daily protein was not matched: the casein group simply ate more protein and more calories, so the study cannot separate the bedtime timing from the extra protein. When researchers have matched total daily protein, the timing advantage largely disappears. Trials comparing casein taken before bed with the same casein taken earlier in the day, including an eight-week study in trained lifters and a ten-week study in recreational athletes, found no statistically significant difference in muscle or strength gains between the groups. A 2021 systematic review concluded that 20 to 40 g of casein before sleep improves the overnight protein synthetic response in healthy young men and may help muscle mass and strength over longer training blocks, while effects in older men were less clear. > **THE HONEST READ** > > **Bedtime casein works mainly because it adds a protein meal.** > > If a pre-sleep shake is the easiest way for you to reach your daily protein target, it is a good tool and casein is a sensible choice for it. If you already hit your target, moving protein to bedtime is unlikely to add much on its own. None of this makes casein special in a magic sense. It makes it practical. Many people find it hard to fit in one more protein feeding during the day, and the hours before bed are often free. A slow, thick, filling shake suits that slot, and the research says it does no harm to overnight protein balance and may help. That is the accurate case for buying casein, and it is a decent one. ## 3. The Best Casein Protein Powders Every pick below is built on micellar casein, comes from a different brand and is sold through mainstream US retailers, with most available on Amazon. Nutrition figures are per the label or retailer listing at the time of writing and vary by flavor, so check the tub you buy. We have not tasted or lab-tested these ourselves; comments on taste and mixing are buyer feedback. ### 1. Optimum Nutrition Gold Standard 100% Casein **Award:** Best Overall | **Type:** Micellar casein, flavored - **Protein per serving:** 24 g (label) - **Calories:** About 120 - **Third-party testing:** Banned-substance tested (per brand) - **Best for:** Bedtime shakes, puddings Gold Standard Casein is the most widely sold casein powder in the US and the easiest to find on Amazon. Per the label at the time of writing, a roughly 33 to 34 g scoop gives 24 g of protein from micellar casein at about 120 calories, and the brand describes it as banned-substance tested. It comes in Chocolate Supreme, Creamy Vanilla, Cookies and Cream and Chocolate Peanut Butter, and buyers commonly report it thickens into a good pudding. **Bottom line:** The safe, widely available default casein for a bedtime shake or protein pudding. **Pros:** - 24 g of micellar casein per scoop at about 120 calories - Banned-substance tested, per the brand - Several flavors and large tub sizes widely available **Cons:** - Thick and prone to clumping in a shaker, as buyers report - Mid-range rather than budget cost per 25 g [Check price on Amazon](https://www.amazon.com/dp/B002DYJ0PW?tag=sktiger-20) ### 2. Dymatize Elite Casein **Award:** Best Certified Flavored | **Type:** Micellar casein, flavored - **Protein per serving:** About 25 g (label) - **Calories:** About 120-130 - **Third-party testing:** Informed Choice (per listings) - **Best for:** Tested athletes Dymatize Elite Casein is 100% micellar casein with about 25 g of protein per two-scoop serving of roughly 33 to 36 g, and 120 to 130 calories depending on flavor, per retailer labels at the time of writing. Retailer listings describe it as Informed Choice certified, which makes it a good fit for athletes who want banned-substance testing in a flavored casein. Buyer feedback on taste is mixed by flavor, and reviewers note it contains soy. **Bottom line:** The flavored casein to buy if you want a certification behind it at a mainstream price. **Pros:** - About 25 g of micellar casein per serving - Informed Choice certified, per retailer listings - Often discounted through Subscribe and Save **Cons:** - Contains soy, per reviewers - Two scoops per serving, so tubs empty faster than they look [Check price on Amazon](https://www.amazon.com/dp/B00JXP38MU?tag=sktiger-20&linkCode=ll1) ### 3. Naked Casein Micellar Casein Protein **Award:** Best Unflavored | **Type:** Micellar casein, unflavored - **Protein per serving:** About 26 g (label) - **Calories:** About 110-130 - **Third-party testing:** NSF Contents Certified (per brand) - **Best for:** Baking, clean label Naked Casein is a single-ingredient micellar casein in its unflavored form, with about 26 g of protein per two-scoop serving of roughly 30 g, per the brand at the time of writing; calorie figures are listed at about 110 to 130 depending on the source. Naked says the casein comes from grass-fed cows on US farms and that the unflavored powder is NSF Contents Certified. It is the cleanest base for puddings, baking and mixing into yogurt. **Bottom line:** The pick for anyone who wants pure micellar casein to flavor and cook with themselves. **Pros:** - About 26 g of protein per serving, the most here - Single ingredient in the unflavored version - NSF Contents Certified, per the brand **Cons:** - Bland and chalky in water on its own, as buyers report - Does not mix well in a shaker bottle [Check price on Amazon](https://www.amazon.com/dp/B00NBILDQ8?tag=sktiger-20) ### 4. Transparent Labs Grass-Fed Casein Protein **Award:** Best Premium | **Type:** Grass-fed micellar casein, flavored - **Protein per serving:** About 25 g (brand) - **Calories:** About 120 - **Third-party testing:** Informed Choice (per brand) - **Best for:** Premium, stevia-only Transparent Labs uses instantized micellar casein from grass-fed cattle, with about 25 g of protein and roughly 120 calories per scoop, sweetened with stevia and no artificial sweeteners, per the brand at the time of writing. The product page shows Informed Choice certification and links to a certificate of analysis. Flavors are Chocolate and Vanilla. Transparent Labs sells mainly direct, so check whether the Amazon search turns up the brand's own listing before buying there. **Bottom line:** The casein to buy if you want grass-fed sourcing and published testing and accept the premium. **Pros:** - Informed Choice certified, with a published certificate of analysis, per the brand - Grass-fed micellar casein, sweetened with stevia - Instantized for easier mixing than most caseins **Cons:** - Highest cost per 25 g in this guide - Only two flavors [Check price on Amazon](https://www.amazon.com/s?k=Transparent%20Labs%20Grass-Fed%20Casein%20Protein&tag=sktiger-20) ### 5. Nutricost Casein Protein Powder **Award:** Best Budget | **Type:** Micellar casein, unflavored and flavored - **Protein per serving:** About 24-25 g (label) - **Calories:** About 110 - **Third-party testing:** Third-party tested (per brand) - **Best for:** Budget, bulk buyers Nutricost's casein is the cheapest micellar casein per gram we found at typical prices, particularly in the 5 lb unflavored bag. Per retailer labels at the time of writing, a 30 g scoop gives about 24 to 25 g of protein at about 110 calories, with micellar casein and sunflower lecithin as the ingredients in the unflavored version. Nutricost describes it as third-party tested and gluten-free, though it does not carry a sport certification we could confirm. **Bottom line:** The best-value casein if you want plain micellar casein in bulk and do not need certification. **Pros:** - Lowest cost per 25 g of protein in this guide - Two-ingredient unflavored version - Large 5 lb size available **Cons:** - No named sport certification - Flavored versions are less widely stocked than the unflavored [Check price on Amazon](https://www.amazon.com/dp/B07SH19M1S?tag=sktiger-20&linkCode=ll1) ### 6. NOW Sports Micellar Casein (Unflavored) **Award:** Best Lower-Calorie Scoop | **Type:** Micellar casein, unflavored - **Protein per serving:** 19 g (label) - **Calories:** About 90 - **Third-party testing:** Brand in-house lab - **Best for:** Baking, puddings NOW's unflavored micellar casein comes with a smaller scoop: per the brand's label at the time of writing, one 24 g scoop gives 19 g of protein and about 90 calories, with roughly 324 mg of calcium. It is sold only unflavored in a 1.8 lb tub of about 34 servings. NOW runs its own in-house testing lab. It is a practical, inexpensive base for puddings and baking, but you will need two scoops for a research-style bedtime dose. **Bottom line:** A cheap, plain casein for cooking and puddings; double the scoop for a bedtime dose. **Pros:** - Low cost per 25 g of protein at typical prices - Unflavored and unsweetened - About 324 mg of calcium per scoop **Cons:** - Only 19 g of protein per scoop - Unflavored only, and earthy-bland in water, as buyers report [Check price on Amazon](https://www.amazon.com/dp/B00MU73LUC?tag=sktiger-20&linkCode=ll1) ## 4. How We Ranked These Casein Powders We started with the casein powders that dominate US searches and Amazon listings, and kept only products whose main protein source is micellar casein. Blended powders that mix whey, caseinate and egg were excluded, because they do not offer the slow-digesting profile people buy casein for. We also required each product to be currently sold in the US with a published nutrition label. Protein per serving and protein as a share of the scoop came first. A powder giving 24 to 26 g of protein from a 30 to 34 g scoop is roughly 70 to 85% protein by weight, which is what you should expect from a quality micellar casein. Lower ratios usually mean more flavoring, sweetener or filler. We also looked at calories, which should sit around 110 to 130 per serving for a flavored casein. Independent testing carried real weight. Informed Choice and NSF certifications screen for banned substances and, in NSF's case, verify that the label matches the contents. A brand saying its product is tested is less useful unless it names the programme or publishes results, so we report testing claims exactly as the brand or retailer states them and point you to the databases to verify your flavor. Cost per 25 g of protein was the tie-breaker. We used typical online prices at the time of writing, rounded into ranges, because Amazon and retailer prices move week to week with Subscribe and Save offers and sales. Treat these figures as a comparison tool between products, not a price quote. ## 5. Casein Powders Side by Side Here are the label figures next to each other. Protein and calories are per serving, per the label or retailer listing at the time of writing, and vary by flavor. Cost per 25 g is an approximate range at typical online prices. | Powder | Protein / serving | Calories | Testing | Approx. cost per 25 g | | --- | --- | --- | --- | --- | | Optimum Nutrition Gold Standard Casein | 24 g | About 120 | Banned-substance tested (per brand) | About $1.45-1.70 | | Dymatize Elite Casein | 25 g | About 120-130 | Informed Choice (per listings) | About $1.30-1.70 | | Naked Casein | 26 g | About 110-130 | NSF Contents Certified (per brand) | About $1.30-1.60 | | Transparent Labs Grass-Fed Casein | 25 g | About 120 | Informed Choice (per brand) | About $1.90-2.20 | | Nutricost Casein Protein | 24-25 g | About 110 | Third-party tested (per brand) | About $0.85-1.10 | | NOW Sports Micellar Casein | 19 g | About 90 | Brand in-house lab | About $1.00-1.45 | The spread in cost is wider than the spread in quality. Nutricost and NOW are the cheapest ways to buy micellar casein per gram, largely because the unflavored versions skip the flavoring and the marketing. Optimum Nutrition, Dymatize and Naked cluster in the middle, and Transparent Labs sits at the top, reflecting its grass-fed sourcing and certification. Protein density is also tight across the field. Every product here delivers roughly 19 to 26 g of protein per serving, and the differences mostly reflect scoop size. NOW's smaller 24 g scoop gives 19 g, while Naked's 30 g double scoop gives 26 g. If you plan to follow the research dose of about 40 g before bed, any of these will need one and a half to two servings, which makes cost per gram more important than it first appears. Testing is where the products really differ. Dymatize and Transparent Labs carry Informed Choice claims, Naked cites NSF Contents Certified status for its unflavored powder, and Optimum Nutrition describes its casein as banned-substance tested. Nutricost and NOW rely on their own testing statements. If you are a drug-tested athlete, start with the certified options and confirm your flavor in the certifier's database. ## 6. Casein vs Whey: Which Should You Buy? The classic comparison is a 1997 study by Boirie and colleagues, which tracked amino acids in the blood after people drank whey or casein. Whey produced a fast, high spike that faded within about three to four hours. Casein produced a lower rise that lasted around seven hours. Whey stimulated protein synthesis more sharply, while casein did more to reduce protein breakdown over the longer window. That is the basis for calling whey fast and casein slow. For a shake right after training, whey is the better default. It is richer in leucine, at roughly 10 to 11% of the protein compared with about 8 to 9% for casein, and it delivers it quickly. It also mixes thinner and costs less per gram in most ranges. Our [best whey protein powder](https://www.best-proteinpowder.com/best-whey-protein-powder/) guide covers that category, and our [whey vs whey isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/) comparison explains when the extra filtering is worth paying for. Casein earns its place when the gap before your next meal is long: overnight, before a long meeting, or when you want a shake that keeps you full. Its thickness and slower emptying from the stomach make it noticeably more filling for many people, which is one reason it appears in our [best protein powder for weight loss](https://www.best-proteinpowder.com/best-protein-powder-for-weight-loss/) picks. Across a whole day the difference shrinks. When total daily protein is matched, studies generally find similar muscle gains whether people use whey, casein or a mix. If you can only buy one tub, whey is the more versatile choice. If you already own whey and want to add a bedtime or between-meals shake, casein is the logical second tub. For the broader picture of building muscle with supplements, see our [best protein powder for muscle gain](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/) guide. Milk itself is a blend of both, which is why a glass of milk or a bowl of Greek yogurt or cottage cheese, both casein-heavy foods, can do the same bedtime job as a shake. Cottage cheese in particular is mostly casein. A powder is simply more convenient and lower in fat and lactose than the whole-food route. ## 7. How Much Casein to Take, and When The research dose for a measurable overnight effect is about 40 g of casein, taken roughly 30 minutes before sleep. For most products in this guide that is one and a half to two servings. Some studies in younger men also found benefits with around 30 g, so if 40 g feels like too much at night, 30 g is a reasonable middle ground. Daily total matters more than the bedtime dose. For people who lift, a daily intake of around 1.6 g of protein per kilogram of body weight is a widely cited target, and a casein shake is just one way to reach it. Our [daily protein guide](https://www.best-proteinpowder.com/how-much-protein-do-i-need/) and [protein calculator](https://www.best-proteinpowder.com/protein-calculator/) will give you a personal number. Timing during the day is flexible. Casein works between meals, as a mid-afternoon snack, or with breakfast if you know you will not eat again for five or six hours. Our [guide to protein timing](https://www.best-proteinpowder.com/when-to-take-protein-powder/) explains when timing matters and when it does not. The one situation where whey is clearly better is immediately after training, when a faster rise in amino acids is the goal. Older adults may have the strongest case for bedtime casein. Ageing muscle responds less to small protein doses, and the 2017 trial in older men found that 40 g, rather than 20 g, was the dose that clearly raised overnight muscle protein synthesis. Anyone with kidney disease, or anyone taking medication or managing a medical condition, should discuss protein targets with a doctor or registered dietitian before adding supplements. ## 8. Beyond Bedtime: Puddings, Baking and Staying Full Casein's thickness, a nuisance in a shaker bottle, is an asset in the kitchen. Mixed with a small amount of milk or water and stirred, a scoop of micellar casein turns into a thick pudding or mousse that many people eat with a spoon. Chill it for half an hour and the texture firms further. This is the single most common way buyers say they make casein enjoyable at night. In baking, casein holds moisture better than whey, which tends to dry out and toughen muffins and pancakes. Unflavored casein, such as Naked, Nutricost or NOW, can replace part of the flour in many recipes. Because casein absorbs a lot of liquid, you usually need a little extra milk, yogurt or egg to keep the batter workable. For appetite control, casein's slower digestion is a practical advantage. A thick casein shake or pudding between meals or after dinner can curb grazing for many people, and pairing it with fruit or a little nut butter makes it a more complete snack. It will not cause fat loss on its own, but it can make a calorie deficit easier to live with. Casein also suits people who want to cut down on liquid before bed. Because a pudding needs only a few ounces of liquid, it is gentler on anyone who wakes to use the bathroom at night. If a full shake before bed disrupts your sleep, try the pudding method or take your casein an hour or two earlier in the evening. ## 9. Who Should Skip Casein Anyone with a milk allergy should avoid casein entirely. Casein is one of the main allergenic proteins in milk, and micellar casein is concentrated milk protein, so it is not suitable for people with a diagnosed cow's milk allergy. Vegans and anyone avoiding dairy for other reasons should look at plant proteins instead; our [best organic protein powder](https://www.best-proteinpowder.com/best-organic-protein-powder/) guide includes several organic pea and hemp options. Lactose intolerance is a different issue. Micellar casein is filtered to remove most lactose, and products like Dymatize and ON list only a few grams of carbohydrate per serving, so many lactose-intolerant people tolerate it in normal amounts. If you are very sensitive, start with a half serving, or take a lactase supplement with it, and see how you feel. You can also skip casein if you already reach your daily protein target from food. The research does not support casein as a must-have; it supports it as a convenient way to add protein. If your diet already covers your needs, an extra tub is optional, and the money may be better spent on food quality or a good whey for after training. Finally, be wary of casein if you suffer from heartburn or reflux at night. A large, thick shake right before lying down does not suit everyone. Taking it an hour or more before bed, or using a smaller dose, may help. If you have ongoing digestive symptoms, see a doctor rather than self-treating with supplements. ## 10. How to Read a Casein Label Before You Buy Check the first ingredient. It should say micellar casein. If it says protein blend, look at the breakdown: blends that list whey concentrate, calcium caseinate and milk protein ahead of micellar casein are not true slow-release casein powders, even if casein is in the product name. Blends are fine as general protein, just not what this guide is about. Divide protein by serving weight. A quality micellar casein should be about 70 to 85% protein by weight; ON lists 24 g in about 34 g, Naked 26 g in about 30 g. A lower ratio means more of the scoop is flavoring, sweetener or other ingredients. It is a quick way to judge value between flavors, too, because chocolate and cookie flavors often have slightly lower protein per gram. Look for a named certification rather than a vague claim. Informed Choice, Informed Sport and NSF Certified for Sport all have public databases searchable by product and flavor. A Certificate of Analysis from an accredited lab is useful, but only if it is recent and for the product you are buying. Our brand reviews of [Optimum Nutrition](https://www.best-proteinpowder.com/optimum-nutrition-protein-powder-review/), [Dymatize](https://www.best-proteinpowder.com/dymatize-protein-powder-review/), [Naked Nutrition](https://www.best-proteinpowder.com/naked-nutrition-protein-powder-review/) and [Transparent Labs](https://www.best-proteinpowder.com/transparent-labs-protein-powder-review/) go deeper on each brand's range and testing. Finally, on Amazon, buy from the brand's own storefront or from listings shipped and sold by Amazon where you can. Supplement counterfeits and expired stock do turn up from third-party sellers. Check the seller name, compare the label photo to the brand's site and avoid listings priced far below every other retailer. If you want a casein outside this list, Legion's Casein+ is another micellar option sold mainly on the brand's own site. Legion describes it as Truly Grass Fed certified micellar casein from Ireland and says it is lab-tested with a published certificate of analysis. We left it out of the main picks because its listed protein per serving varied between sources at the time of writing. ## 11. Common Mistakes to Avoid ### Buying casein to replace your post-workout whey Casein digests slowly and has a little less leucine than whey, so it is the weaker choice right after training. Use whey after workouts and casein for long gaps such as overnight. If you can only afford one tub, buy whey and use milk, yogurt or cottage cheese for bedtime protein. ### Taking a 20 g bedtime dose and expecting the research result The overnight muscle studies mostly used around 40 g of casein, and in older men 20 g did not produce the same clear effect. One scoop of most powders gives 19 to 26 g. If bedtime protein is your plan, take one and a half to two servings, or pair a scoop with Greek yogurt. ### Buying a blend labeled casein Some powders put casein on the front but list whey concentrate, calcium caseinate or milk protein first in the ingredients. Those blends digest faster and are not true slow-release products. If slow release is why you are buying, make sure micellar casein is the first ingredient, not a minor part of a blend. ### Mixing casein like whey Micellar casein thickens as it hydrates and clumps in a shaker with too little liquid. Add powder to liquid rather than the other way round, use at least 10 to 12 oz for a shake, or use a blender. Better still, use less liquid on purpose and eat it as a pudding. ### Expecting bedtime casein to beat a good daily total When total daily protein is matched, studies find little extra benefit from moving casein to bedtime. A pre-sleep shake helps mainly by adding protein. If you are already eating enough, the shake is optional, and your money may do more for you as better food or a whey for training days. ## 12. Frequently Asked Questions ### What is the best casein protein powder? For most people, Optimum Nutrition Gold Standard 100% Casein is the best all-round pick: 24 g of micellar casein per scoop at about 120 calories, banned-substance tested per the brand, and easy to find. Dymatize Elite Casein suits tested athletes, Naked Casein is the best unflavored option, and Nutricost is the budget choice. ### Does taking casein before bed build more muscle? It can help, mainly by adding protein to your day. Studies show about 40 g of casein before sleep is digested overnight and can raise overnight muscle protein synthesis. But when total daily protein is matched, trials comparing bedtime and daytime casein have found little difference in muscle gains. Hitting your daily target matters most. ### How much casein should I take before bed? The research dose is about 40 g, taken roughly 30 minutes before sleep, which is one and a half to two servings of most powders. Around 30 g has also shown benefits in younger adults. If you have kidney disease or a medical condition, check protein targets with a doctor or registered dietitian before adding a nightly shake. ### What is the difference between micellar casein and calcium caseinate? Micellar casein is filtered from milk with its natural micelle structure intact, which is why it clots in the stomach and digests slowly. Calcium caseinate is made by acid-precipitating casein and neutralising it, which breaks up the micelles. Caseinate mixes more easily but is generally considered less slow-digesting, so choose micellar casein for bedtime use. ### Is casein better than whey? Neither is better overall; they suit different times. Whey digests fast and is richer in leucine, so it is the better post-workout choice and usually cheaper per gram. Casein digests slowly and is more filling, so it suits bedtime and long gaps between meals. Across a full day with matched protein, muscle gains tend to be similar. ### Can I take casein if I am lactose intolerant? Often, yes. Micellar casein is filtered to remove most lactose, and most products list only a few grams of carbohydrate per serving. Start with half a serving to test your tolerance. Casein is not suitable for anyone with a cow's milk allergy, though, because casein is one of the main milk allergens, so check with a doctor if unsure. ### Can casein help with weight loss? Indirectly. Casein's thick texture and slow digestion make it more filling than many protein shakes, which can make it easier to avoid evening snacking while eating in a calorie deficit. It does not burn fat on its own. Our [weight-loss protein guide](https://www.best-proteinpowder.com/best-protein-powder-for-weight-loss/) covers how to fit it into a lower-calorie diet. ## Related Protein Powder Guides - [Best Whey Protein Powder](https://www.best-proteinpowder.com/best-whey-protein-powder/): The fast-digesting partner to casein, ranked on real value per gram. - [When to Take Protein Powder](https://www.best-proteinpowder.com/when-to-take-protein-powder/): What the research says about timing, from post-workout to before bed. - [Best Protein Powder for Muscle Gain](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/): Seven picks by lifter type, including where casein fits in. ## The Bottom Line The best casein protein powder is a plain micellar casein with a solid protein-per-scoop ratio, a named testing claim and a price that lets you take a proper dose. For most people that is Optimum Nutrition Gold Standard 100% Casein. Dymatize Elite Casein is the certified flavored alternative, Naked Casein the cleanest unflavored base, and Nutricost the cheapest gram of micellar casein we found. Use casein for what it is good at: a slow, filling protein feeding before bed or across a long gap, at about 30 to 40 g. It works mainly by helping you reach your daily protein target, so if a bedtime shake or pudding makes that easier, it is worth buying. If you already hit your number, it is optional. ## More in Specialty Protein Guides in this category that pair with what you just read. - [Best Protein Powder for Recovery](https://www.best-proteinpowder.com/best-protein-powder-for-recovery/) - [Best Cookies and Cream Protein Powder](https://www.best-proteinpowder.com/best-cookies-and-cream-protein-powder/) - [Best Protein Powder for Oatmeal](https://www.best-proteinpowder.com/best-protein-powder-for-oatmeal/) - [Best Protein Powder Before Bed](https://www.best-proteinpowder.com/best-protein-powder-before-bed/) - [Best Protein Powder for Baking](https://www.best-proteinpowder.com/best-protein-powder-for-baking/) - [Best Lactose-Free Protein Powder](https://www.best-proteinpowder.com/best-lactose-free-protein-powder/) - [Best Organic Protein Powder](https://www.best-proteinpowder.com/best-organic-protein-powder/) - [How Much Protein Do I Need?](https://www.best-proteinpowder.com/how-much-protein-do-i-need/) - [Optimum Nutrition Protein Powder Review](https://www.best-proteinpowder.com/optimum-nutrition-protein-powder-review/) 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/)