# Muscle Milk Protein Powder Review

> Muscle Milk protein powder, label by label: Pro Series, Genuine, 100% Whey and Zero compared on protein per scoop, calories, sweeteners and cost per 25 g.

- **URL**: https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/
- **Updated**: 2026-11-02
- **Author**: [Best Protein Powder Editorial Team](https://www.best-proteinpowder.com/authors/editorial-team/)
- **Publisher**: [Best Protein Powder](https://www.best-proteinpowder.com/)

---

Four Muscle Milk powders, read off the label: how much protein each scoop really gives you, what the extra calories are made of, and which tub earns its place in a muscle-building diet.

**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/)

Muscle Milk is a good protein powder brand with one great product and three that only make sense for specific people. The Pro Series packs 50 g of milk protein into a two-scoop serving and carries NSF Certified for Sport, which makes it one of the cheapest certified routes to a lot of protein. Genuine is a creamy, higher-fat shake that works best as a calorie top-up. The 100% Whey is a sensible everyday scoop. Zero gives you only 15 g of protein per serving and is the one we would skip.

## Our Top Picks

| Award | Product | Why |
| --- | --- | --- |
| Best Muscle Milk Overall | [Muscle Milk Pro Series Protein Powder](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/#muscle-milk-pro-series-protein-powder) | The best-value Muscle Milk tub and a strong certified pick for anyone who needs a lot of protein. |
| Best for Weight Gain | [Muscle Milk Genuine Protein Powder](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/#muscle-milk-genuine-protein-powder) | Buy it to add easy calories while bulking, not as a lean everyday protein. |
| Best Everyday Whey | [Muscle Milk 100% Whey Protein Powder with Probiotics](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/#muscle-milk-100-whey-protein-powder) | A sensible daily whey if you like the brand, though Pro Series at one scoop is often cheaper. |
| Lightest Option | [Muscle Milk Zero Sugar Protein Powder](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/#muscle-milk-zero-protein-powder) | Skip it for muscle gain; one scoop of Pro Series gives more protein for similar calories. |
| Alternative: Leaner Whey | [Optimum Nutrition Gold Standard 100% Whey](https://www.best-proteinpowder.com/muscle-milk-protein-powder-review/#optimum-nutrition-gold-standard-100-whey) | The pick if you want a leaner, more widely loved whey than anything in the Muscle Milk range. |

## 1. The Short Verdict

If you only read one paragraph, read this one. **Buy the Muscle Milk Pro Series** if you want a lot of protein for the money and you train hard enough to use 50 g in a sitting, or you are happy to split the serving into two single-scoop shakes of about 25 g each. It is the product in the range where the label, the price and the certification line up.

Buy **Genuine** only if you are trying to gain weight and actively want the extra fat and carbohydrate. At roughly 270 to 280 calories for 32 g of protein, it behaves more like a light mass shake than a lean protein powder, and that is fine if you know that is what you are buying. If you are cutting, it is the wrong tub.

The **100% Whey** is a perfectly reasonable everyday whey at about 27 g of protein for around 130 calories per scoop, with a probiotic added. **Zero** is where the range loses us: 15 g of protein per two-scoop serving means you need almost two servings to reach a useful dose, and the cost per gram climbs to the top of the range.

Compared with the rest of the market, Muscle Milk is not the cleanest label and not the best-tasting brand by buyer consensus, but it is widely stocked, often discounted on Amazon and certified across its powder line. For a full ranking against other brands, see our guide to the [best protein powder for muscle gain](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/).

> **THE VERDICT**
>
> **Pro Series is the one to buy. Zero is the one to skip.**
>
> Pro Series gives you about 50 g of protein per two-scoop serving at one of the lowest certified costs per 25 g we found. Zero gives you 15 g per two scoops, so you pay far more for every gram of protein.

## 2. Who Makes Muscle Milk

Muscle Milk is made by CytoSport, a California sports-nutrition company that built the brand around a creamy, milk-based shake. Hormel Foods bought CytoSport in 2014, and PepsiCo acquired it from Hormel in 2019. That ownership is why you now see Muscle Milk next to Gatorade and other PepsiCo drinks in gas stations and grocery fridges.

The brand today is better known for its ready-to-drink shakes than its powders, and that matters when you shop. Search results, store shelves and Amazon listings mix the two together, and the bottled shakes have different protein figures from the tubs. This review covers the powders only. If you want a bottle in the fridge, compare shakes against tubs on cost per gram first, because the powder is almost always cheaper.

Muscle Milk positions itself as a mainstream, gym-floor brand rather than a clean-label or premium one. You will not find grass-fed claims, organic seals or single-ingredient tubs here. What you will find is a lot of protein per serving, a long ingredient list built for texture, and two artificial sweeteners, acesulfame potassium and sucralose, across the flavored range.

That positioning is not a criticism on its own. Most people buying a 5 lb tub of protein want it to taste like a milkshake, mix easily and not cost a fortune. Muscle Milk is built for that buyer. Readers who want a short ingredient list should look at our [best clean protein powder](https://www.best-proteinpowder.com/best-clean-protein-powder/) picks instead.

## 3. The Range Side by Side

Muscle Milk sells four powders in tubs at the time of writing: Pro Series, Genuine, 100% Whey with probiotics and Zero. They look similar on the shelf, all in the same black-and-color branding, but they are very different products. The table below puts the key label numbers in one place so you can see the gap between them before reading the cards.

| Powder | Protein / serving | Serving | Calories | Best for |
| --- | --- | --- | --- | --- |
| Pro Series | About 50 g | 2 scoops (about 82 g) | About 300-320 | Big doses, value |
| Genuine | About 32 g | 2 scoops (about 70 g) | About 270-280 | Weight gain |
| 100% Whey | About 27 g | 1 scoop | About 130 | Everyday whey |
| Zero | About 15 g | 2 scoops | About 100 | Low-calorie, light shakes |

The most useful way to read that table is protein as a share of calories. Pro Series and 100% Whey both deliver roughly two thirds or more of their calories from protein. Genuine delivers under half, because about 9 g of fat and around 21 g of carbohydrate come along with every serving, per the label at the time of writing. Zero is lean but small.

Serving size matters too. Pro Series and Genuine both use two scoops as the labelled serving, so a single scoop of Pro Series is roughly 25 g of protein, which is a normal post-workout dose. Many buyers report using one scoop and treating the tub as twice as many servings as the label says, which also halves the calorie hit.

Flavor ranges differ by product. Pro Series is the narrowest, with Knockout Chocolate, Intense Vanilla and Slammin Strawberry listed at the time of writing. Genuine carries the widest range, including chocolate, vanilla creme, cookies and creme and strawberries and creme. Availability varies by retailer, so check the flavor before assuming every size is in stock.

## 4. The Muscle Milk Powders, Ranked

We ranked the four powders Muscle Milk currently sells in tubs on protein per serving, cost per 25 g, certification and how much non-protein filler rides along with each scoop. One clearly labelled alternative from another brand is included for readers who want a leaner, isolate-led whey. All figures are per the label at the time of writing and vary by flavor, so check the panel on the tub you buy.

### 1. Muscle Milk Pro Series Protein Powder

**Award:** Best Muscle Milk Overall | **Type:** Milk protein and whey blend, 50 g serving

- **Protein per serving:** About 50 g (2 scoops)
- **Calories:** About 300-320
- **Third-party testing:** NSF Certified for Sport (brand)
- **Best for:** High protein targets, value

Pro Series is the reason to buy Muscle Milk. Per the label at the time of writing, a two-scoop serving of about 82 g delivers 50 g of protein from a blend of milk proteins, caseinates and whey, at roughly 300 to 320 calories depending on flavor, with about 3 g of sugar. The brand lists it as NSF Certified for Sport. One scoop is a normal 25 g dose, which makes the tub stretch a long way.

**Bottom line:** The best-value Muscle Milk tub and a strong certified pick for anyone who needs a lot of protein.

**Pros:**

- About 50 g protein per two-scoop serving, per the label
- NSF Certified for Sport, per the brand
- One of the lowest certified costs per 25 g we found
- Single scoop gives a standard 25 g dose

**Cons:**

- Sweetened with acesulfame potassium and sucralose
- Mixed buyer feedback on vanilla and strawberry flavors
- Milk-protein blend is not low-lactose

[Check price on Amazon](https://www.amazon.com/dp/B0B5L4TJX1?tag=sktiger-20&linkCode=ll1)

### 2. Muscle Milk Genuine Protein Powder

**Award:** Best for Weight Gain | **Type:** Milk protein blend with added carbs and fat

- **Protein per serving:** About 32 g (2 scoops)
- **Calories:** About 270-280
- **Third-party testing:** NSF Certified for Sport (brand)
- **Best for:** Hard gainers, bulking

Genuine is the original creamy Muscle Milk shake. Per the label at the time of writing, two scoops of about 70 g give 32 g of protein at roughly 270 to 280 calories, with around 9 g of fat and 21 g of carbohydrate but only 2 to 4 g of sugar. The protein comes from milk protein isolate, whey concentrate and calcium caseinate, and maltodextrin and creamer give it the thick texture buyers like.

**Bottom line:** Buy it to add easy calories while bulking, not as a lean everyday protein.

**Pros:**

- About 32 g protein per serving, per the label
- Creamy texture buyers consistently praise
- Wide flavor range
- NSF Certified for Sport, per the brand

**Cons:**

- Under half its calories come from protein
- Maltodextrin, creamer and artificial sweeteners
- Wrong tool for a cut

[Check price on Amazon](https://www.amazon.com/dp/B0B5L5T76W?tag=sktiger-20&linkCode=ll1)

### 3. Muscle Milk 100% Whey Protein Powder with Probiotics

**Award:** Best Everyday Whey | **Type:** Whey protein with added probiotic

- **Protein per serving:** About 27 g (1 scoop)
- **Calories:** About 130
- **Third-party testing:** NSF claim applies to brand powders; check database
- **Best for:** Everyday post-workout shakes

The 100% Whey is Muscle Milk's straight whey product and the leanest scoop in the range. Per the retailer label at the time of writing, one scoop gives about 27 g of protein at roughly 130 calories, with a Bacillus subtilis probiotic added. It uses the same acesulfame potassium and sucralose sweetener pair as the rest of the line. It suits buyers who want a normal single-scoop whey from a brand they can find in any store.

**Bottom line:** A sensible daily whey if you like the brand, though Pro Series at one scoop is often cheaper.

**Pros:**

- About 27 g protein per scoop for around 130 calories
- Straight whey rather than a milk-protein blend
- Single-scoop serving is simple to dose

**Cons:**

- Probiotic adds little for most buyers
- Fewer flavors and patchier availability than Pro Series

[Check price on Amazon](https://www.amazon.com/s?k=Muscle%20Milk%20100%25%20Whey%20Protein%20Powder%20with%20Probiotics&tag=sktiger-20)

### 4. Muscle Milk Zero Sugar Protein Powder

**Award:** Lightest Option | **Type:** Low-calorie milk protein powder

- **Protein per serving:** About 15 g (2 scoops)
- **Calories:** About 100
- **Third-party testing:** NSF claim applies to brand powders; check database
- **Best for:** Light protein drinks

Zero is Muscle Milk's light shake: two scoops give about 15 g of protein for roughly 100 calories with zero sugar, per the label at the time of writing. That is lean, but it is also a small dose, and the label itself carries a note that it should not be used for weight reduction. Sweeteners include sucralose and acesulfame potassium alongside stevia. You need nearly two servings to reach 25 g, which pushes its cost per gram to the top of the range.

**Bottom line:** Skip it for muscle gain; one scoop of Pro Series gives more protein for similar calories.

**Pros:**

- About 100 calories per serving with zero sugar
- Easy, light shake for people who do not want a big dose

**Cons:**

- Only about 15 g protein per two scoops
- Highest cost per 25 g in the range
- Still uses artificial sweeteners

[Check price on Amazon](https://www.amazon.com/dp/B00KQTLSBK?tag=sktiger-20&linkCode=ll1)

### 5. Optimum Nutrition Gold Standard 100% Whey

**Award:** Alternative: Leaner Whey | **Type:** Whey blend (isolate + concentrate)

- **Protein per serving:** About 24 g (1 scoop)
- **Calories:** About 120
- **Third-party testing:** Informed Choice (confirm flavor)
- **Best for:** Everyday whey, flavor choice

If you want a straight whey with fewer texture additives than Muscle Milk, Gold Standard is the obvious alternative. Per the label at the time of writing, a scoop of roughly 30 g gives about 24 g of protein at around 120 calories, with whey isolate listed first in the blend. It is promoted as Informed Choice certified and comes in a far wider flavor range. It usually costs a little more per 25 g than Pro Series.

**Bottom line:** The pick if you want a leaner, more widely loved whey than anything in the Muscle Milk range.

**Pros:**

- About 24 g protein for around 120 calories, per the label
- Whey isolate listed first; less filler than Genuine
- Promoted as Informed Choice certified

**Cons:**

- Usually pricier per 25 g than Pro Series
- Flavored versions use artificial sweeteners

[Check price on Amazon](https://www.amazon.com/dp/B000GISTZ4?tag=sktiger-20&linkCode=ll1)

## 5. Cost per 25 g of Protein

Cost per 25 g of protein is the only fair way to compare a 50 g serving with a 15 g one. Prices move constantly, especially on Amazon where Subscribe and Save coupons come and go, so treat the figures here as approximate ranges from the listings we checked rather than prices you will see today.

Pro Series is the clear value pick. A 5 lb canister holds about 28 two-scoop servings, and at the per-serving prices we saw on Amazon, that works out to roughly $1.00 to $1.30 per 25 g of protein. That is in the same range as budget whey brands and cheaper than most certified isolates, which usually land between $1.30 and $2.00 per 25 g.

Genuine's 4.94 lb tub holds about 32 servings of 32 g. Its list price is high, but it is frequently discounted, so the cost per 25 g swings from around $1.00 on a good deal to $1.80 or more at full price. The 100% Whey sits in the middle at roughly $1.20 to $1.60 per 25 g. Zero, with only 15 g per serving in a smaller 1.65 lb tub, typically costs the most per gram of protein in the range.

> **Approximate cost per 25 g of protein**
>
> - **$1.00-1.30**: Pro Series
> - **$1.00-1.80**: Genuine (deal-dependent)
> - **$1.20-1.60**: 100% Whey
> - **$1.70+**: Zero

If price is your first filter, compare these numbers with our [best cheap protein powder](https://www.best-proteinpowder.com/best-cheap-protein-powder/) guide, which covers the lowest-cost tubs on the market. Pro Series holds its own there, mainly because NSF certification at that price is unusual.

## 6. What Is in the Protein Blend

Muscle Milk powders are not pure whey. Pro Series and Genuine both use a milk-protein blend, which per the labels we checked combines milk protein isolate or concentrate, calcium or sodium caseinate and whey protein concentrate, with whey isolate also listed in some Pro Series flavors. The exact order of ingredients varies by flavor and label version.

That blend is not a weakness. Milk protein is roughly 80 percent casein and 20 percent whey, so these powders digest more slowly than a straight whey isolate. For a post-workout shake the difference is small in practice, and for a shake between meals or before bed a slower release is arguably an advantage. Research on muscle protein synthesis consistently finds that total daily protein matters far more than the exact type.

Where the blend does matter is lactose and digestion. Concentrates and caseinates carry more lactose than isolates, so readers who bloat on regular milk may react to Genuine or Pro Series. If that is you, the 100% Whey, a pure isolate or one of the picks in our [whey versus whey isolate](https://www.best-proteinpowder.com/whey-vs-whey-isolate/) comparison is a safer start.

The 100% Whey is the only straight whey product in the range, and Zero is built on milk protein too. None of the powders are vegan, and all carry a milk allergen warning. If you need dairy-free, Muscle Milk is simply the wrong brand, and our [Sunwarrior review](https://www.best-proteinpowder.com/sunwarrior-protein-powder-review/) covers a plant-based alternative.

## 7. Where the Calories Come From

Read the ingredient list on a Genuine tub and you will see maltodextrin, a non-dairy creamer blend and oils high up. Those are what give the shake its thick, milkshake-like texture, and they are also where most of the 270 to 280 calories per serving come from. Sugar is low, around 2 to 4 g depending on flavor, but carbohydrate is not.

Pro Series carries some of the same texture ingredients, including maltodextrin and MCTs, which is why a two-scoop serving lands around 300 to 320 calories. The difference is that 50 g of protein accounts for about 200 of those calories, so the non-protein share is much smaller. Per gram of protein, Pro Series is the leaner of the two by a wide margin.

For someone trying to gain weight, those extra calories are a feature. A hard gainer who struggles to eat enough can drink a Genuine shake with whole milk and add 400 to 500 calories without much effort. For that use, Muscle Milk competes with lighter gainers, and our [best protein powder for weight gain](https://www.best-proteinpowder.com/best-protein-powder-for-weight-gain/) guide covers the heavier options.

For someone cutting, the calculus flips. Every 100 calories of maltodextrin and creamer is 100 calories you could have spent on food. If you are in a calorie deficit, choose the 100% Whey or Pro Series at one scoop, or an isolate. Muscle Milk Zero is lower in calories, but you pay for that with less protein per serving.

## 8. NSF Certification

This is Muscle Milk's strongest selling point and the one most buyers overlook. Per the brand, its protein powders are NSF Certified for Sport, which means each certified product is screened for more than 270 substances banned in sport, checked for label claim accuracy and reviewed for contaminants. The program also audits the manufacturing facility.

For tested athletes, from college players to anyone competing in a drug-tested federation, NSF Certified for Sport is the certification most governing bodies point to. It is unusual to find it on a powder at Muscle Milk's price. Many budget tubs carry no third-party certification at all, and many premium brands charge twice as much for the same seal.

Certification status can change by flavor and size, and it is not a guarantee about every lot. If you are a tested athlete, look up the exact product and flavor in the NSF Certified for Sport database before you buy, and keep the lot number. The brand claim is a good sign, but the database is the record.

Certification is not the same as a clean label. NSF checks that the product contains what it says and nothing banned. It does not judge artificial sweeteners, maltodextrin or creamer. A powder can be certified and still not be the one you want to drink every day, which is why we rank Pro Series above Genuine despite both carrying the same claim.

## 9. Who Should Skip It

**Skip Muscle Milk if you want a short ingredient list.** Every flavored powder in the range uses acesulfame potassium and sucralose, and the larger tubs add maltodextrin, creamer and oils. If you prefer unflavored or stevia-sweetened powders, look at our [best unflavored protein powder](https://www.best-proteinpowder.com/best-unflavored-protein-powder/) guide.

**Skip it if you are lactose sensitive.** The milk-protein and concentrate blends in Pro Series and Genuine are not low-lactose products. An isolate such as Dymatize ISO100, covered in our [Dymatize review](https://www.best-proteinpowder.com/dymatize-protein-powder-review/), is the more comfortable choice for most people who react to dairy.

**Skip Genuine if you are cutting**, and skip Zero if cost per gram matters to you. Neither is a bad product, but each is built for a narrow use. Genuine is a calorie product, and Zero is a light shake that delivers barely half a normal post-workout dose per serving.

**Skip it if taste is your top priority.** Buyer feedback on Pro Series flavor is mixed, with chocolate generally preferred over vanilla and strawberry. Genuine gets warmer reviews for creaminess. If you want a powder that buyers consistently rate as dessert-level, our [best tasting protein powder](https://www.best-proteinpowder.com/best-tasting-protein-powder/) guide is a better place to shop.

## 10. How to Use It for Muscle Gain

Most adults building muscle do well on roughly 1.6 g of protein per kg of body weight per day, with benefits tapering above about 2.2 g per kg, according to a widely cited 2018 meta-analysis. A protein powder is just a convenient way to hit that number. Our [protein needs guide](https://www.best-proteinpowder.com/how-much-protein-do-i-need/) walks through the maths for your weight.

Use Pro Series as one scoop, not two, for most shakes. One scoop gives roughly 25 g of protein, which is the dose most studies use after training. Save the full 50 g serving for days when you are replacing a meal or you are a larger lifter with a high daily target. Splitting the serving doubles the life of the tub and halves the cost per shake.

Use Genuine as a calorie tool. Mix two scoops with whole milk and a banana, and you have a 500-plus calorie shake for a hard gainer. Use 100% Whey as your daily scoop if you want a straight whey, and keep Zero for people who want a light protein drink rather than a muscle-building dose.

Whatever you choose, the shake is a supplement to meals, not a replacement for them. People with kidney disease, those who are pregnant, and anyone on medication or with a milk allergy should check with a doctor or registered dietitian before adding a high-protein powder. This page is label analysis, not medical advice.

## 11. Common Mistakes to Avoid

### Comparing per serving instead of per gram

Pro Series lists 50 g per serving and Zero lists 15 g, so a price per tub or per serving tells you nothing. Divide the price by total grams of protein in the tub and multiply by 25. That single number makes every Muscle Milk product, and every rival, directly comparable.

### Taking two scoops of Pro Series by default

The labelled serving is two scoops and 50 g of protein, which is more than most people need in one sitting. One scoop gives about 25 g, the dose most research uses after training. Using one scoop halves the calories and doubles the number of shakes you get from the tub.

### Using Genuine on a cut

Genuine is a good shake, but under half its calories come from protein, with maltodextrin, creamer and oil making up much of the rest. In a calorie deficit those extra 100 to 150 calories per serving add up quickly. Switch to the 100% Whey or a single scoop of Pro Series while cutting.

### Confusing the shakes with the powders

Muscle Milk sells bottled shakes and tubs under similar names, and the protein figures differ. A search for Muscle Milk on Amazon often mixes both. Read the listing title and the serving size before you add to cart, and compare cost per 25 g, because bottles almost always cost more per gram.

### Trusting the certification claim without checking

The brand says its powders are NSF Certified for Sport, which is a real advantage. But certification can vary by flavor and size, and tested athletes carry the risk personally. Look up the exact product in the NSF database before competition and keep the lot number from the tub.

## 12. Frequently Asked Questions

### Is Muscle Milk protein powder good for building muscle?

Yes, as long as you pick the right tub. Pro Series and 100% Whey both deliver a full dose of protein with most of their calories coming from protein, which is what matters for muscle gain. Genuine works too but adds a lot of carbohydrate and fat. Total daily protein and consistent training matter far more than which Muscle Milk product you choose.

### Is Muscle Milk real milk?

The powders are built on milk proteins, including milk protein isolate or concentrate, caseinates and whey, so they are dairy products and carry a milk allergen warning. They are not simply dried milk, though. Maltodextrin, creamer, oils, flavors and sweeteners are added for texture and taste. None of the powders are suitable for vegans or people with a milk allergy.

### How much protein is in a scoop of Muscle Milk Pro Series?

The labelled Pro Series serving is two scoops of about 82 g, which gives about 50 g of protein at the time of writing. That means one scoop is roughly 25 g of protein, a standard single dose. Calories run about 300 to 320 for the full serving depending on flavor, so a single scoop is roughly half that.

### Is Muscle Milk NSF Certified for Sport?

Per the brand, its protein powders are NSF Certified for Sport, and retailer listings for Pro Series and Genuine repeat the claim. The program screens for more than 270 banned substances and checks label accuracy. If you are a drug-tested athlete, confirm your exact product and flavor in the NSF Certified for Sport database before buying, because status can vary.

### Does Muscle Milk have artificial sweeteners?

Yes. The flavored powders we checked list acesulfame potassium and sucralose, and Zero also lists stevia. These sweeteners are approved for use in food in the US and keep sugar low, around 2 to 4 g per serving in most flavors. If you avoid artificial sweeteners, Muscle Milk is not the brand for you; look for unflavored or stevia-only powders.

### Is Muscle Milk good for weight loss?

Not especially. Genuine is too calorie-dense for most cutting diets, and Zero gives so little protein per serving that it does a poor job of keeping you full. If you are losing weight, a single scoop of Pro Series or the 100% Whey is the better choice from this brand, or look at a lean isolate. This is general information, not medical advice.

### Who owns Muscle Milk?

Muscle Milk is made by CytoSport. Hormel Foods bought CytoSport in 2014, and PepsiCo acquired it from Hormel in 2019, so the brand is now part of PepsiCo. That is why Muscle Milk shakes and powders are so widely distributed, from grocery stores and gas stations to Amazon and warehouse clubs, and why discounts are frequent.

## Related Muscle-Building Guides

- [Best Protein Powder for Muscle Gain](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/): Our full ranking of powders for building muscle, across brands and budgets.
- [Dymatize Protein Powder Review](https://www.best-proteinpowder.com/dymatize-protein-powder-review/): ISO100, Elite Whey and Elite Casein compared on label, cost and certification.
- [Best Protein Powder for Weight Gain](https://www.best-proteinpowder.com/best-protein-powder-for-weight-gain/): Mass gainers and calorie-dense shakes for hard gainers.

## The Bottom Line

Muscle Milk is worth buying, but mostly for one product. The Pro Series gives you about 50 g of protein per two-scoop serving, NSF Certified for Sport per the brand, at a cost per 25 g that rivals budget whey. Use it one scoop at a time and it is one of the better-value certified powders on Amazon.

Buy Genuine only if you want the calories, treat the 100% Whey as a reasonable everyday option, and skip Zero if you are buying for muscle. If artificial sweeteners, lactose or a long ingredient list put you off, the brand is not for you, and our [muscle-gain rankings](https://www.best-proteinpowder.com/best-protein-powder-for-muscle-gain/) have cleaner alternatives.

## More in Brand Reviews

Guides in this category that pair with what you just read.

- [Optimum Nutrition Protein Powder Review](https://www.best-proteinpowder.com/optimum-nutrition-protein-powder-review/)
- [Premier Protein Powder Review](https://www.best-proteinpowder.com/premier-protein-powder-review/)
- [Pure Protein Powder Review](https://www.best-proteinpowder.com/pure-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/)