7 Day Customer Support
  • Live Chat
  • 1-800-537-9910
USD
ON 100% Casein Gold Standard Protein

Optimum Nutrition Gold Standard 100% Casein

An Product
Slow Digesting, Anti-Catabolic Casein Protein High in BCAAs!
  • 24g of slow-digesting micellar casein per serving
  • Over 5g of BCAAs (Leucine, Isoleucine & Valine)
  • Very low levels of fat, sugars & carbohydrates
  • Ideal for use between meals and before bed
Muscle & Strength Rewards

Earn 2 points for every dollar you spend at Muscle & Strength! Spend your points on order discounts, fitness gear and exclusive products.

2 Free Samples

Try before you buy! You can choose 2 free samples with every order you place at Muscle & Strength.

Same Day Shipping

We ship fast! USA orders placed before 6pm EST will be shipped the same day.

International orders placed before 4pm EST will be shipped the same day.

60 Day Guarantee

Not happy with your purchase? No problem. Simply return it to us within 60 days and we'll replace it, credit your account, or give you a full refund.

Contact Us

If you have any questions about products please call us on 1-800-537-9910 or email support@muscleandstrength.com

Buying Options
$33.99 33.9900
2lbs
27 Servings | $1.26 Per Serving
+
$53.98 53.9800
4lbs
55 Servings | $0.98 Per Serving
+
 
Nutrition Info

2lbs Chocolate Peanut Butter

Serving Size: 1 Heaping Scoop (33g)
Servings Per Container: 27
Amount Per Serving
Amt
%DV
Calories
120
Calories From Fat
10
Total Fat
1g
2%
Saturated Fat
0.5g
3%
Trans Fat
0g
Cholesterol
10mg
3%
Sodium
220mg
9%
Total Carbohydrate
3g
1%
Dietary Fiber
1g
4%
Sugars
0g
Protein
24g
Vitamin A
0%
Vitamin C
0%
Calcium
60%
Iron
4%
Typical Amino Acid Profile per Serving
Essential Amino Acids (EAAs)
Tryptophan
 
292mg
Valine
 
1609mg
Threonine
 
1039mg
Isoleucine
 
1312mg
Leucine
 
2129mg
Lysine
 
1822mg
Phenylalanine
 
1144mg
Methionine
 
644mg
Conditionally Essential Amino Acids (CAAs)
Arginine
 
866mg
Cystine
 
79mg
Tyrosine
 
846mg
Histidine
 
688mg
Proline
 
2421mg
Glutamine & Precursors
 
4950mg
Nonessential Amino Acids (NAAs)
Aspartic Acid
 
1589mg
Serine
 
1396mg
Glycine
 
510mg
Alanine
 
664mg
* % Daily Value is based on a 2,000 calorie diet. Your daily values may be higher or lower based on your calorie needs.
† Daily Value (DV) not established.
Ingredients
Micellar Casein, Cocoa (Processed with Alkali), Natural And Artificial Flavors, Salt, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Lecithin, Acesulfame Potassium, Sucralose, Aminogen®.
Allergen Warning
Contains milk and soy (lecithin) ingredients.

Add on 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. Take Gold Standard 100% Casein™ immediately before bed and in between meals when delayed protein delivery is desired. You may drink Gold Standard 100% Whey™ or Pro Complex® proteins before and immediately after workouts for a rapid shot of amino acids.

Do not use as a sole source of nutrition for weight loss or maintenance. Keep out of reach of children.

Directions
Warnings
Expand Info
Product Information

Beyond the Basics

  • 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
  • Very Low Levels of Fat, Sugar & Carbohydrates
  • Ideal for Use Between Meals and Before Bed

Sometimes slower is better - especially when it comes to the rate of protein digestion. While rapid protein absorption is desirable directly before or after exercise, delayed release is probably more beneficial throughout the remainder of the day and night time.

Casein proteins are pH sensitive and gel in the acidic environment of the stomach. As a result, it can take more than twice as long for caseins to be broken-down into their amino acid subcomponents than whey and other protein sources. Because of their unique time-released traits, caseins are aptly described as anti-catabolic or muscle-protecting proteins.

Casein protein is ideal for use in between meals and before bed. Casein protein is sometimes known as "night time" protein because it's ideal to have just before you go to bed.

Muscle Fuel Around the Clock

Optimum Nutrition has you covered day and night. Try Optimum Nutrition 100% Whey Gold Standard before and immediately after workouts for a fast-acting rapid shot of amino acids right when you need it, and Optimum Nutrition 100% Casein Gold Standard between meals and before bed for prolonged, sustained coverage.

Optimum Nutrition 24-Hour Coverage

Reviews
Overall Rating
4.6 out of 5 stars
Reviews (490)
Verified Buyers (469)
Review Graph
  • 5 star
    79%

  • 4 star
    16%

  • 3 star
    3%

  • 2 star
    1%

  • 1 star
    1%

Top Rated Flavors
  • Blueberries & Cream (5/5 )
  • Mint Chocolate Chip (4.9/5 )
  • Chocolate Supreme (4.7/5 )
  • Strawberry (4.7/5 )
  • Cookies & Cream (4.7/5 )
  • Creamy Vanilla (4.5/5 )
  • Chocolate Peanut Butter (4.5/5 )
  • Chocolate Cake Batter (4.5/5 )
  • Cookies & Cream (4.4/5 )
  • Cookie Dough (4.4/5 )
  • Banana Cream (4.3/5 )
  • Show More +
    Show Less -
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Eric
Burn Fat
Verified Buyer
Does not mix well. Does not taste good. I believe there has to be a better casein protein out there than this.*
Was this helpful?
You found this not helpful
3 of 4 found this helpful
2012-01-28 01:24:49Z
Overall Rating
  • Cookies & Cream
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Anas A
Transformation
Sleep and get bigger muscles.*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2018-01-16 21:28:33Z
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
bruzer
Build Muscle
Calls to mix with 10-12 oz liquid, any less and its pudding. This stuffs thick! I usually stick to plain vanilla cause its the most versatile with smoothies and yogurt but this vanilla was a little off. To me it has a hint of coconut, almost like a pina colada and I dont like coconut. I mix with water now to not enhance flavor with milk, also use a blender stick to make it smooth. Quick chug before bed and Im full with good protein. Overall 4.5 stars because the stuff woks but taste is bad and Im mainly looking for performance.*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2012-11-23 06:34:50Z
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Jordan king
Build Muscle
First casein I've bought and will be the one I stick with. Keeps me full for hours and don't wake up feeling totally empty. Taste great, little thicker then other shakes but isn't a problem at all for me. I take mine down in a shaker bottle and comes out smooth'm big on ON products and this one didn't disappoint.*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2011-01-11 05:09:14Z
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Erin
Other
Verified Buyer
Great product. The best casein hands down. Vanilla is yummy and versatile to seasonings/spices.*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2010-12-21 22:25:31Z
Overall Rating
  • Cookies & Cream
  • Show More +
    Show Less -
User Image
Mark C
Verified Buyer
I already have it in my cart to order again. Great stuff *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2021-01-11 10:57:06Z
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Jeffrey L
Verified Buyer
Tastes great, minimal foaming, I've been using this product in this flavor for a number of years and don't get tired of it.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2021-01-01 19:33:43Z
Overall Rating
    Show More +
    Show Less -
User Image
William V
Verified Buyer
Great taste but a bit expensive.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2020-12-26 22:39:31Z
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Jose V
Verified Buyer
Great taste and flavor.  Will be purchasing more of same product. *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2020-12-25 23:42:08Z
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Vahan G
Burn Fat
Verified Buyer
Great flavor and taste! Highly recommended!*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2020-12-23 18:11:11Z
* Muscle & Strength does not imply any medical claims from this review. There are no guarantees of specific results and results may vary.
* 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.