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100% Casein Protein

By Optimum
100% Casein Protein Optimum
Overall Score:
(Weighted average based on 139 Reviews)

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100% Casein Protein ranks #3 of 22 in (Protein > Casein Protein) and is rated better than 90% of all products in this category.


Trust: 100%

Optimum just continues to impress me!

Overall: 10 | Effectiveness: 10 | Value: 10

After finishing my second 4lb jug I thought it was time for a review. This has become my favorite Optimum Protein. Just like all other Optimum Proteins it has a great amino acid profile. 1 scoop contains 5g of BCAA's and 5g of glutamine. Whats amazing, is that the total release of amino acids can last...


Trust: 100%

Hated the taste, but might give it another whirl.

Overall: 7 | Effectiveness: 7 | Value: 7

I bought this from a GNC while purchasing other powders, having never tried ON casein in the past, and decided to give it a try. The kid at the store had told me for that particular flavor (Cookies and Cream) he liked it by itself in milk at night.

Effectiveness: I'd rank it a 7/10, as it tended to...


Trust: 100%

Mediocre taste—but no protein farts!

Overall: 7 | Effectiveness: 9 | Value: 6

Understanding there’s no shortage of reviews for Optimum Nutrition’s Gold Standard 100% Casein, I nevertheless feel compelled to do a review as this has been a staple of mine for a while. If you don’t understand the reasoning behind having casein in your daily arsenal, it basically boils down to...


Trust: 100%

It is a bit more expensive than some other casein powders out there but it is worth it

Overall: 9 | Effectiveness: 9 | Value: 9

If you are looking for a casein protein to take before bed then you should go with Optimum 100% Casein for sure. It is a bit more expensive than some other casein powders out there but it is well worth it. One of the reasons I used to have a hard time sleeping through the night was that I would get...

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RodrigoRM's 100% Casein Protein Review

Overall: 10 | Effectiveness: 9 | Value: 9

Well I am on my third tub of Optimum casein and I like almost everything about it. It is a time released protein formula which comes in handy in special times of the day, bedtime mostly. I strongly believe that it should be a staple supplement on every serious athlete.

Convenience - I find this protein...


Trust: 10%

nmucha01's 100% Casein Protein Review

Overall: 9 | Effectiveness: 10 | Value: 10

ON does it again for me.

I just finished my huge tub of Casein, 55 serving I think. I had chocolate.

Taste: 10/10. I usually don't get chocolate If I can avoid it, and I'm kind of a *** when it comes to taste, I'll admit. But ON Casein tasted awesome, it was smooth and chocolatey, I would actually...


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shinndigg's 100% Casein Protein Review

Overall: 9 | Effectiveness: 9 | Value: 8

Purchased this along with Optimum's 100% Whey Protein as part of the "Performance Stack" you can buy on bb.com, which also includes a free 90 count bottle of Opti-Men vitamins. Everything I had read about casein protein indicated it is best used before bed due to it's slower digestion rate, which is...

Trust: 0%

CharlesAFerg's 100% Casein Protein Review

Overall: 10 | Effectiveness: 9 | Value: 9

One thing I must begin with, is that you don't necessarily need a blender to mix this properly. You can use a whisk in a mug, and spin it between your palms to create a great mix with this product. I don't have to use the blender to have a clump-free blend. Wonderful!
(Be sure to use enough liquid,...


Trust: 100%

kingmeat's 100% Casein Protein Review

Overall: 8 | Effectiveness: 9 | Value: 7

I started off with a two pound tub of casein because this was my first time using it. I wasn't sure if it would be worth the money to spend being that cottage cheese is a much cheaper route and also there are less expensive casein proteins but I trust Optimum to deliver on what they sell.

I love that...

Trust: 12%

I've clearly noticed improved recovery and none of the muscle "burnout"

Overall: 9 | Effectiveness: 10 | Value: 8

I hate giving a product a ten, but I really CANNOT find a flaw with this protein.

Most people don't realize the importance of a casein protein. This is great for retaining the anabolic state necessary for muscle building while recovering from your workout overnight. Obviously since the target sleep...