Gold Standard 100% Casein Protein
Optimum Nutrition

Gold Standard 100% Casein Protein

Nighttime Use Protein Powder for Building Muscle*
Ideal for Between Meals and Before Bed to Feed Muscles and Fuel Recovery*
8.8  out of 10  (2,618 Reviews)

Ratings & Reviews

Gold Standard 100% Casein Protein
Overall Rating
8.8
2,618 Ratings
Verified Buyer Rating
8.8
939 Ratings
Average Flavor Rating
7.9
14 Flavors
Top Rated Flavor
10
Creme de chocolate
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May 18, 2021
1
Verified Buyer

This is awful. Will not mix in a shaker cup, maybe in a blender I dunno. When I drink it, I'm drinking nothing but clumps. I have bought Casein from Optimum Nutrition before but its been awhile and this is nothing like it. Like other reviewers they have changed the product and definitely not for the better. Sorry Optimum Nutrition I love your whey but I can't even choke your Casein down.

Apr 18, 2021
3
 

I've been using this product for almost 5 years and it was the best casein I've ever tasted. Up untill the latest redesign of the product. The label is just a bit different so it's not that obvious, but as soon as you open the box you can notice a completely different product inside. The powder is no longer a bit 'grainy', but smooth like wheat powder. The smell is almost the same. The old product you could mix it just with a spoon easily. In milk or water. Now with the new product it's almost impossible. Powder sticks to everything. I'll never buy this product again. Note: I'm from Europe and I know it's produced in the UK or Ireland for our market, so maybe in the US you're lucky and they didn't ruin the product

Feb 10, 2021
1
Verified Buyer

Hands down the worst casein I have ever tasted. It taste like as if you are drinking chemicals. Almost as if you didn't wash all the soap out. Its honestly horrible.

Jan 22, 2021
10
 

I train very early in the morning, taking this stuff after I work out gets me to lunch without starving. Otherwise, I am starving by about 0900. I've done carbs and whey but they don't stick with me like this casein does.

Nov 18, 2020
10
Verified Buyer

Chocolate Supreme is great - have been using this forever and love it!!!! I accidentally ordered Chocolate Peanut Butter and I don't like it at all and can barely get through the rest of it.

Aug 05, 2020
10
Verified Buyer

Great taste and thick like a milkshake. Will continue ordering this product

Jul 09, 2020
9
Verified Buyer

Taste great, mixes well.

Jan 29, 2020
10
Verified Buyer

You can never know how bad the artificial sweeteners till you try this product, the taste is amazing like never before ... a real chocolate drink without any after taste. It is the best you may ever try. I use it before bed and so happy with it.

Jan 04, 2020
8
Verified Buyer

I tried this flavor first; better than the second order French Vanilla but, I have the Chocolate Supreme on deck. I like the digestion but, have not found the right flavor yet. There is always cottage cheese.

Nov 03, 2019
10
Verified Buyer

Great in the evening, and to make a protein fluff

Sep 07, 2019
10
Verified Buyer

Very good protein, mixes well. I use this as an evening snack.

Aug 29, 2019
10
Verified Buyer

Of all the supplements on the market, this is absolutely the best and the one that really works! And if for some reason you miss a workout or need to lay off for a while, continue taking this because it will maintain the gains you've made. I never mix anything with this other than occasionally adding a dash of pumpkin pie spice to make it taste exactly like egg nog. I drink this while watching a bit of TV before bed and when I'm finished I always feel a bit pumped. Jump into bed and off I GROW!

Jul 23, 2019
9
Verified Buyer

Mixes very thick but that is to be expected for casein. The vanilla is good for me because I can mix it with various fruits or chocolate powder. The vanilla casein does have a distinct smell. Both me and my daughter separately came to the conclusion the powder smells similar to coconut flour. I'm not sure if this is specific to the vanilla or if that is a smell the other flavors also give off. Either way, it helps my muscles recover and rebuild when I know I won't have protein for long stretches of time.

Jul 16, 2019
1
 

To anyone who is doing research, Casein is a marketing ploy. It is a joke of a product. Protein synthesis does not activate until a minimum of 12 grams of protein are in your body. Casein releases less than 6 grams per hour. Your body does not even enter protein synthesis using this product. It is quite literrally empty calories that will just turn to fat. This product is designed only for marketing. Do not become a sucker to the snake oil that is Casein.

Jun 17, 2019
10
Verified Buyer

Best casein in my opinion

4 Sizes
2 Lbs.
Choose a Size
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4 Flavors
Chocolate Peanut Butter
Choose a Flavor
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Price: $34.99  ($1.35 / Serving)
Flavor Rating: 7.4

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Ideal for Between Meals and Before Bed to Feed Muscles and Fuel Recovery*
Learn more about Micellar Casein Protein.
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