Gold Standard Natural 100% Casein
Currently Unavailable
Optimum Nutrition

Gold Standard Natural 100% Casein

Slow Protein Digestion!*
Natural Slow Digesting, Anti Catabolic Miceller Protein!*
8.5 out of 10 (154 Reviews)

Product Overview

Rapid protein use is desirable immediately before and after exercise to help refuel recovering muscles, but delayed digestion and absorption may be more beneficial at other times - including bedtime when your body typically goes for hours without food.* Casein proteins are sensitive and tend to thicken in the stomach. Because of this, it can take more than twice as long for our Gold Standard Natural 100% Casein to be broken down into its amino acid subcomponents than other proteins.* Gold Standard Natural 100% Casein is also free of artificial flavors, sweeteners, and synthetic colors and uses only premium micellar caseins to create a protein that is truly time-released.*

Beyond The Basics

  • No Artificial Flavors, Sweeteners, or Synthetic Colors.
  • Loaded with Micellar Casein.
  • 24 grams of time-released protein per serving.*
  • Contains AMINOGEN® digestive enzymes to enhance utilization.*
  • Nearly 5 grams of BCAAs (Leucine, Isoleucine, and Valine).
  • Nearly 5 grams of Glutamine Precursors in every scoop.

Ratings & Reviews

Overall Rating
8.5
154 Ratings
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
7
Verified Buyer

At first I didn't like it at all, I mix it with milk and it was very thick and a very strong vanilla flavor then I start mixing it with water and I could tolerate it after all it's protein and I wasn't going to waste it!!

10
Verified Buyer

keeps me filled up and taste great

8
 

This is a good protein to drink just before bed. As others have mentioned, the chocolate creme doesn't taste anything like chocolate. Keep with it, though, as it will grow on you. I mix mine in a shaker cup with unsweetened, plain almond milk. I add cinnamon and 1 packet of raw monk fruit (0 calories, natural...get at Target or WF), and I leave it in the fridge for the day. It won't be lumpy if you let it sit for a while. This is not one to mix and drink right away because it will have some lumps. Also can add PB2 for extra flavor. I have high metabolism and usually get hungry at night. This helps so I don't wake up starving.

9
Verified Buyer

I use a mix of casein and whey to mix my own blended protein shakes. While the taste of this protein is not as good as some of the others i have tried, it does not contain sucralose; which is the main reason i switched. I have a shake for breakfast and one post-workout. I blend almond milk, almond butter, protein blend I described above, oat mill, greek yogurt and fresh fruit. This serves as a meal/calorie supplement. I work out 5 days a week and run about 10-15 miles per week. Due to my high activity level, i have to increase my calorie intake to maintain my weight. This provides me with a clean protein supply that works perfect for me.

8
Verified Buyer

Kept me full during the night, great when mixed with a fast absorbing protein for a optimal release of protein!

8
Verified Buyer
No written review.
9
Verified Buyer

This was my first Casein I have ever taken, so I did not know what to expect. Overall, I would say this is not a bad product for those who don't mind a very subtle taste with not much flavor. The best way I could describe it is mixing cocoa powder with milk or water. I do not recall it being at all sweet or having much in the way of flavor. That being said though, I had no issue with it because it was not difficult to drink. If you do add milk though beware not to add too much powder because it will thicken up like yogurt. I added almost two scoops to a blender bottle along with all milk and it was like drinking a thick, powdery milk...ewww. All in all though, if you want something super simple and light on taste this may be just for you. Was a great starter powder for me

5
 

The flavor of this protein was absolutely horrible, and I am unable to use this product due to the poor taste. Either I got a bad batch or the flavor rating scale is flawed.

10
 
No written review.
10
Verified Buyer
No written review.
1
 
No written review.
7
 

I bought this product once thinking that I would explore supplements with more natural profiles to avoid so many artificial sweeteners and colors in my diet. While the performance was as expected, coupled with my diet/exercise plan, I wasn't overly impressed. The flavor profile of Vanilla was not at all something I looked forward to drinking on a nightly basis, with water or milk. Also, I think the sugars are a bit high for this type of product, even if avoiding artificial sweeteners.

6
 

I have had a 4 lb tub of this Casein for at least 8 months as I just can't get past the texture and flavor without mixing it with a better tasting powder. Still have about 1 lb left to go and will not be reordering. I love ON's Whey just not their Casein.

8
Verified Buyer

At first I opened up the tub and it smelled like... French Vanilla (pretty good). But, I tried this with just using it with the recommended amount of water (the basics) and I thought it tasted absolutely horrible. It tasted like some household cleaner. Then I tried it again with milk and tasted similar to the first taste test. Then, after I was about to give up with it and store it away for good or throw it out, I thought maybe I will try it with Almond Milk. It tasted 10X better than with water or milk! It completely fixed the taste. So, in conclusion: If you think French Vanilla flavor tastes bad, try it with Almond Milk before you dump it. Even Unsweetened Almond Milk does the trick!

8
Verified Buyer
No written review.
Learn more about Micellar Casein Protein.
Check out other Build Muscle Products.