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  (2,612 Reviews)
Save 25%
Order and automatically receive 25% Off in your cart on Select Optimum Nutrition Products!

Product Overview

There is only one Gold Standard
Optimum Nutrition Gold Standard 100% Casein
  • 24 GRAMS OF PROTEIN
  • 9+ GRAMS OF ESSENTIAL AMINO ACIDS
  • 40-50% OF THE DAILY VALUE FOR CALCIUM
  • DELIVERS BCAAs FOR UP TO 8 HOURS
  • DELIVERS ESSENTIAL AMINO ACIDS UP TO 7 HOURS
  • DELIVERS LEUCINE OVER 6.5 HOURS

THERE'S ONLY ONE GOLD STANDARD

THE INDUSTRY'S FIRST ALL MICELLAR CASEIN POWDER
  • The Original All Casein Protein Powder
  •  Bodybuilding.com 2013 & 2015 Casein Supplement of the Year
  • Made Exclusively With Micellar Casein
  •  24 Grams of Slowly Digesting Protein Per Serving
  • Use Between Meals to Support Satiety and/or Before Bed as Your PM Protein*
Optimum Nutrition Isolate
OPTIMUM TRUE STRENGTH

True Strength is a journey. It never rests, it never quits. It's about overcoming obstacles, accomplishing goals, and recognizing achievements. And then it resets to achieve again. As your trusted sports nutrition partner in goal achievement, ON demonstrates that same passion while crafting our products. From the raw materials we source to our state-of-the-art manufacturing processes, no compromises are made. You set the bar higher after every workout, we set the bar higher to redefine the industry standards and ensure you realize optimum results.

QUALITY

After training, you want a fast-acting whey protein shake to kick-start the recovery process. But that process can take up to 48 hours to complete. Supplementing your healthy, balanced diet with slowly digesting Gold Standard 100% Casein™ can help support a feeling of fullness while providing a slow, steady flow of Essential Amino Acids including the BCAAs to muscle tissues.* With nine different flavors to choose from, this is the standard all other slowly digesting proteins are measured against.

Optimum Nutrition Essential Amino Energy
CONSISTENCY

As one of the few companies to operate state-of-the-art manufacturing facilities that are GMP compliant, ON assures that every shake will mix up effortlessly because of its first-to-market instantization process.

HISTORY & HERITAGE

Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world's best-selling whey protein, ON's Gold Standard 100% Casein™ introduced slow-digesting nighttime protein to the weight training world and Essential Amino Energy™ created the anytime energy category in sports nutrition. When technology makes advancements possible, ON will be the company bringing it first to your shaker cup.

Gold Standard at a glance. What: Slower digesting Protein. When: Between meals or before bed. Why: Muscle Building and Statiety
NATURAL ALTERNATIVES
NO ARTIFICIAL FLAVORS, SWEETENERS OR COLORS
Optimum Nutrition Gold Standard 100% Casein Natural Flavors NATURAL ALTERNATIVES. NO ARTIFICIAL FLAVORS, SWEETENERS OR COLORS

Ratings & Reviews

Gold Standard 100% Casein Protein
Overall Rating
8.8
2,612 Ratings
Verified Buyer Rating
8.8
935 Ratings
Average Flavor Rating
7.9
13 Flavors
Top Rated Flavor
8.4
Chocolate supremo
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.
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
  • 8 Creamy Vanilla

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
  • 10 Creamy Vanilla

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

Aug 29, 2019
10
Verified Buyer
  • 10 Creamy Vanilla

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
  • 7 Creamy Vanilla

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
  • 9 Chocolate Supreme

Best casein in my opinion

Jun 06, 2019
8
Verified Buyer
  • 6 Cookies & Cream

Great product, for someone that is very limited on time in the day-to-day basis. Also perfectly for periods of fasting and/or right before sleep. Maybe a different flavor next time

May 08, 2019
10
 
  • 9 Banana Cream

Fast shippingand great customer service. Mixed the banana cream protein with greek yogurt and water and the flavor is close to that of a real banana smoothie. I'm a fan!

Apr 26, 2019
10
Verified Buyer
  • 10 Chocolate Supreme

Delicious and smooth.

Apr 25, 2019
9
Verified Buyer
  • 10 Chocolate Supreme
Apr 24, 2019
10
Verified Buyer
  • 10 Chocolate Supreme

Straight 10 for me, only tried chocolate supreme and love the taste. Mixes great and tastes like cake mix when I drink it with the egg whites. Great way to get in some slow digesting protein.

Apr 24, 2019
9
Verified Buyer

Love the quality of ingredients in this casein! I especially like that they do not use sucralose. Flavor is great, but I would say an 8/10 in that area! I eat this as chocolate pudding every night before bed as I'm in contest prep right now. I do think it has helped me maintain as much muscle as I can while dieting down!

Apr 09, 2019
9
Verified Buyer
  • 8 Chocolate Supreme

Pretty good! Not too sweet and mixes well.

4 Sizes
2 Lbs.
Choose a Size
{{vm.group.name}}
{{group.violatorText}} {{group.name}}
{{group.skus[0].inventory.labelDisplay}}
{{group.salePriceDisplay}}
{{group.strikePriceDisplay}}
6 Flavors
Chocolate Supreme
Choose a Flavor
{{vm.sku.name}}
{{sku.name}}
Flavor Rating: {{sku.flavorRating | flavorRating}}
{{sku.inventory.labelDisplay}}
{{vm.group.violatorText}}
Save 25% in Cart
Was:  {{vm.group.strikePriceDisplay}}
Price: $34.99  ($1.30 / Serving)
Flavor Rating: 8.4
Ideal for Between Meals and Before Bed to Feed Muscles and Fuel Recovery*

What's in Optimum Nutrition Gold Standard 100% Casein Protein

2 Lbs. Chocolate Supreme
Serving Size About 1 Scoop (34g)
Servings Per Container26
Amount Per Serving
Calories 120       
% Daily Value *
Total Fat 1 g 1%
Saturated Fat .5 g 3%
Cholesterol 15 mg 5%
Sodium 290 mg 13%
Total Carbohydrate 4 g 1%
Dietary Fiber 1 g 4%
Total Sugars 1 g       
Includes 0g Added Sugars 0%
Protein 24 g 48%
Calcium 540 mg 40%
Iron 1.2 mg 6%
Potassium 220 mg 4%
Not a significant source of trans fat and vitamin D.
* The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Ingredients:
Micellar Casein, Cocoa Powder (Processed with Alkali), Natural and Artificial Flavor, Salt, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Lecithin, Acesulfame Potassium, Sucralose, Protease (Aminogen®).
CONTAINS: MILK AND SOY.

Directions For Gold Standard 100% Casein Protein:

Add about 1 scoop (34g) casein protein powder to 10-12 fl. oz. of cold water, milk or your favorite beverage. Stire, shaker or blend for 30 seconds until dissolved.

For best results, mix up your shake 30-60 minutes before bed, or have it between meals as an anytime snack in your balanced, high-protein diet.

Warnings: STORE IN A COOL, DRY PLACE. SERVING SCOOP INCLUDED, BUT MAY SETTLE TO THE BOTTOM DURING SHIPPING.

* 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.
Learn more about Micellar Casein Protein.
Check out other Performance Products.