Review Graph
Top Rated Flavors
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Most Recent
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Most Helpful
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All Reviews (96)
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Verified Buyers (95)

Ali A
Build Muscle
Verified Buyer
CASEIN FROM ON IS THE WAY TO GO, TESTE GOOD, I TAKE IT AROUND 10 PM AND IT KEEPS ME FULL ALL NIGHT.*
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Glenn C
Verified Buyer
This is my go to casein. Clean ingredients list and taste fantastic! Only problem is how OVER priced and expensive it is. Optimum has gotten pricey over the years*
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Todd T
Build Muscle
Verified Buyer
Optimum Nutrition Gold standard natural 100% casein helps me meet my protein goals without a bunch of artificial flavors or ingredients. I often take this before bed because it is a slow digesting protein. The flavor is subtle,but I like it and there isn't a weird after taste.*
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Patrick S
Verified Buyer
Great taste, goes down smooth for end of the day protein meal. *
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John G
Verified Buyer
I use this at night before bed time as my late night snack. Great product *
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James H
Verified Buyer
The flavor is a good vanilla but the smell is like waffles in the morning. This is best when taken at night before bed. *
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Steve S
Healthy Lifestyle
Verified Buyer
Love the French Vanilla flavor. Like all casien, it's very filling and slow digesting.*
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Todd T
Build Muscle
Verified Buyer
Optimum Nutrition Natural 100%Casein has a good, slightl hint of sweet taste. It doesn't taste like an amazing dessert like some other protein powders, but it allows you a chance to cut back on artificial sweeteners or sugar. Casein is a great slowly digested protein.*
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Steve S
Healthy Lifestyle
Verified Buyer
Best Casein I've found. Tastes great and is easy to stack with other supplements*
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Kristian D
Verified Buyer
Mixes well and tatses great!No gritty mouth feel and good amount of aminos. *
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Joseph C
Verified Buyer
Really like this product. I would definitely buy this again.*
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Seagan M
Verified Buyer
Flavor is nice, smells and taste like straight cocoa powder. If you a chocolate fan, this is definitely what you want.*
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Gagandeep S
Verified Buyer
Quality and Results: I am really satisfied with the quality and results while using this casein. It is a bit more expensive than the normal casein from Optimum Nutrition. However, it is naturally flavored, which makes it better than other artificially flavored proteins.
Flavor: Chocolate Creme flavor tastes great.*
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Jac B
Sports Improvement
Verified Buyer
Mixed well, not chunky, vanilla taste is good. I would just recommend mixing with almond Mille or milk rather than water*
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DJ B
Verified Buyer
Fantastic taste! It is like drinking a milkshake when you mix it with milk. *
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Todd T
Build Muscle
Verified Buyer
Optimum Nutrition Natural Casein is a great choice for a slow digesting protein. Especially helpful overnight and the taste is light with just a touch of sweetness. It tastes good , but not like a creamy , sweet shake or dessert if that is what you are looking for.*
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Brett
Healthy Lifestyle
Verified Buyer
I buy optimum nutrition because I want quality, and this doesn't disappoint.*
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DJ B
Verified Buyer
Flavor is good and I love the all natural ingredients! I have definitely seen a difference in muscle mass since starting to use this product. Highly recommended.*
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Ves N
Build Muscle
Verified Buyer
Thick and rich with a slow digestive protein released through your body while you’re rested and asleep. I wake up feeling solid and so do my muscles*
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Mickey L
Verified Buyer
This has got to be the best casein protein on the market and the vanilla is delicious. You can taste the honey powder with the vanilla. This is the only casein protein I have found that is 100% casein like it says.*
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Cyndi K
Verified Buyer
Taste amazing it’s my favorite! I will be purchasing more in the future!*
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DJ C
Verified Buyer
Great all natural product. Just not a fan of the French Vanilla. *
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Todd T
Build Muscle
Verified Buyer
I use Optimum Nutrition casein protein mainly before bed for its slower digestion . The vanilla flavor is more of a hint of honey flavor than vanilla. Honey is listed in the ingredients.*
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Denis
Verified Buyer
Great taste and adds perfect thickness for protein ice cream. *
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Marty A
Verified Buyer
First casein I’ve used so can’t compare. Does not mix nearly as nicely as their whey. Taste when mixed with almond milk is unnoticeable. Tastes like thick milk with powder chunks. *
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Jad S
Verified Buyer
Will keep buying it. the best in my opinion.*
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Jad S
Verified Buyer
Tastes good and mixes well with water. Easy to drink but a bit too sweet *
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Jad S
Verified Buyer
Tastes good and light on the stomach late at night. Bought it again.*
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Jad S
Verified Buyer
Excellent product, will buy again for sure.
French Vanilla tastes good, light. *
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Arek K
Verified Buyer
Tastes good, keeps me full at night, good for protein pudding*
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Jorge R
Verified Buyer
I love this stuff. Tastes great with just water.*
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Dalton D
Verified Buyer
Amazingggggg for in the morning if u dont eat much breakfast*
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Josiah C
Verified Buyer
Great casein product to add to any diet.*
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Eric R
Build Muscle
Verified Buyer
Great product. Works as expected.*
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Pablo D
Verified Buyer
Super product great efficiency*
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Josh P
Build Muscle
Verified Buyer
The vanilla is better than the chocolate in my opinion and this helps me feel less sore when I take it the night of working out *
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Bekhan T
Verified Buyer
Great quality product! Solid flavor too.*
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Pablin wilfe S
Verified Buyer
Combine with casein good sleep!*
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Yuvraj K
Verified Buyer
Love the taste and mixes well even with a spoon . *
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Justin R
Verified Buyer
Great for baking and cooking. *
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tomas v
Increase Endurance
Verified Buyer
Recommended, this case is good, flavor, texture, etc.*
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Patrick R
Verified Buyer
Best mixing casein I’ve used. The flavor is bland but I’ve had worse. *
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Josh P
Build Muscle
Verified Buyer
This has been crucial to my recovery before bed*
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Brian B
Verified Buyer
I like that it seems to have very little sweetener in it. That in itself makes it stand out above the others.*
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Andre A
Verified Buyer
Can’t get in the UK. Wish we could.*
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Michael D
Verified Buyer
A little thicker than other proteins but tasty and great before bed!*
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Brian S
Verified Buyer
Good solid Casein. Mixes and tastes good.*
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evan c
Verified Buyer
Best on the market always fast delivery *
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Ahmed A
Verified Buyer
Sleep and get bigger muscles...*
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akhmetov J
Verified Buyer
VERY GOOD PRODUCT .............*
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* Muscle & Strength does not imply any medical claims from this review. There are no
guarantees of specific results and results may vary.
* These statements have not been evaluated by the Food and Drug Administration. This product is
not intended to diagnose, treat, cure, or prevent any disease.