Gold Standard 100% Casein
Optimum Nutrition

Gold Standard 100% Casein

Nighttime Use Protein Powder for Building Muscle
Ideal for Between Meals and Before Bed to Promote the Growth and Maintenance of Muscle Mass
8.7 out of 10 (2,742 Reviews)
2 Sizes
907 Grams
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2 Flavors
Chocolate Supreme
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Price: € 30,16 (€ 1,12 / Serving)
Flavor Rating: 8.2
Black Friday Deal
For a limited time, buy 1 Gold Standard 100% Casein, 2 Lbs. & get 1 50% OFF!

Product Overview

gold standard 100% casein

Isolate proteins are desirable immediately before and after exercise to support muscle growth and maintenance, however casein proteins may be more beneficial at other times – including bedtime when your body typically goes for hours without food.

Casein proteins are acid sensitive and thicken in the stomach. Casein is best utilized before bedtime to help maintain muscle mass while your body is in a fasted state. By using only premium micellar casein as a protein source, ON has created a formula that sets the standard for slow digesting protein support.


  • Best-Selling Micellar Casein
  • 75% Protein by Weight (24G of Protein per 32G Serving Size)
  • 24 Grams of Slow-Digesting Micellar Casein per Serving
  • Over 5 Grams of BCAAs (Leucine, Isoleucine and Valine) per Serving
  • Nearly 5 Grams of Glutamine & Glutamic Acid in Every Scoop
  • Very Low Levels of Fat, Sugar & 3.5 Grams of Carbohydrates per Serving
  • Ideal for Use Between Meals and Before Bed

What is micellar casein?

Micellar Casein is one of the highest quality forms of casein. It is separated from milk through an ultrafiltration process. One of Micellar Casein’s unusual properties is its ability to gel during digestion.

24 Hour Protein Coverage. Ameria's Best Selling Protein Combination Click to View Gold Standard 100% Whey



pure whey protein isolates are the primary protein source

Caseine protein for before & between meals

delivers 10 grams of essential amino acids per serving

all micellar casein formula enhanced with digestive enzymes

Ratings & Reviews

Overall Rating
2,742 Ratings
Verified Buyer Rating
918 Ratings
Average Flavor Rating
10 Flavors
Top Rated Flavor
Mint Chocolate Chip
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Verified Buyer
  • 10 Mint Chocolate Chip
  • 10 Mint Chocolate Chip - Exclusive!

I order the 3 sample packets of Mint and it was delicious. I made it with half&half +water (my Keto-friendly version of milk lol) and it tasted delicious, reminded me of a shamrock-shake. Definitely gonna re-order

  • 10 Chocolate Supreme
  • 10 Chocolate Creme

I really like this natural gold standard casein protein, I take it right before bed and mix it with 12oz of fat free milk and 2tbsp of natural peanut butter, next I’m going to try the natural gold standard whey in chocolate

Verified Buyer

My go to nighttime protein, great for making a protein fluff for that nighttime treat.

Verified Buyer
  • 10 Chocolate Supreme
  • 9 French Vanilla
  • 10 Cookies & Cream

I have tried several different casein products including optimum nutrition, dymatize, muscle pharm. And I must say ON really stands out, from my experience the best mixibilty out there for a casein and the taste **** its just so good also the nutrition profile is on point. Simply there is nothing I dont love about this. when mixed with water = AMAZING when mixed with cold milk = MILK SHAKE no different from what you would buy from an ice cream shop when made into a pudding = ONE OF MY FAVORITE SNACKS This definitely is the GOLD STANDARD

Buy 1 Get 1 50% Off
907 Grams
907 Grams
27 Servings | € 1,12 Per Serving
€ 30,16
1.8 Kilograms
1.8 Kilograms
56 Servings | € 0,88 Per Serving
€ 49,05

What's in Optimum Nutrition Gold Standard 100% Casein

2 Lbs. Chocolate Supreme
Supplement Facts
Serving Size1Rounded Scoop(33g)
Servings Per Container27
Per 33g
Energy 484kJ
115 kcal
Protein 24g
Total Carbohydrate 3.5g
Of Which Sugars 1.5g
Total Fat 0.7g
Of Which Saturates 0.3g
Of Which Trans Fat 0g
Dietary Fiber 1g
Sodium 242mg
Micellar Casein* [Contains Emulsifier: Soy Lecithin], Fat-Reduced Cocoa Powder, Flavor, Salt, Thickeners (Cellulose Gum, Carrageenan Gum, Guar Gum), Sweeteners (Acesulfame Potassium, Sucralose), Enzyme Complex (Amylase, Protease, Cellulase, Beta-D-Galactosidase, Lipase).
*From Milk

Directions For Gold Standard 100% Casein:

Using a shaker cup is the easiest and most convenient way to mix up a consistently great casein shake every time. Just add one heaping scoop of Gold Standard 100% Casein™ to a shaker cup filled with 10-12 oz of your preferred beverage. Cover and shake for 25-30 seconds. TIP: Adjust the intensity of your Gold Standard 100% Casein™ by varying the amount of liquid that you use to prepare it. For a bolder flavor with slightly more body and sweetness, mix one heaping scoop with 8-10 oz of water, milk, or your favorite beverage. For a milder tasting, less sweet shake, use 12-14 oz of liquid per scoop.

PACKETS: Add one Packet of Gold Standard 100% Casein™ to a blender filled with 10-12 oz. of water, milk, or your favorite beverage. Blend for 20-30 seconds. Then add 3-4 ice cubes and blend for an additional 30 seconds.

BLENDER: Add one heaping scoop of Gold Standard 100% Casein™ to a blender filled with 10-12 oz of water, milk, or your favorite beverage. Blend for 20-30 seconds. Then add 3-4 ice cubes and blend for an additional 30 seconds.
SHAKE UP YOUR SHAKE: By adding a few high-energy ingredients to your shake you can blend up a delicious meal: try adding fresh or frozen fruits (strawberries, bananas, peaches, etc.), peanut butter, flaxseed oil, yogurt, coconut, slivered almonds, or other ingredients.
STACK YOUR SHAKE: By adding supplements like Micronized Creatine, Glutamine, Taurine, and/or INSTANTIZED BCAA powders, you can make Gold Standard 100% Casein™ an even more powerful recovery product.

SPOON STIRRED: If you forgot your shaker cup or don't have time to get out the blender, you can just add one heaping scoop of Gold Standard 100% Casein™ to a glass filled with 10-12 oz of cold water, milk, or your favorite beverage. Then mix it up with a spoon for about 30 seconds or until powder is dissolved.

SUGGESTED USE: Consume approximately 1 gram of protein per pound of body weight per day through a combination of high protein foods and supplements. For best results, consume your daily protein allotment over several small meals spread evenly throughout the day. TIP: Try using "slower" Gold Standard 100% Casein™ with "faster" proteins like Gold Standard 100% Whey™ or Pro Complex® at different times for maximum effectiveness. Take Gold Standard 100% Casein™ immediately before bed and in between meals when delayed protein delivery is desired. Drink Gold Standard 100% Whey™ or Pro Complex® proteins before and immediately after workouts for a rapid "shot" of amino acids.


* 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.
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