Get Big For Less! Up to 56% off muscle building essentials! Save on protein, creatine, test boosters, and more!
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 Protein for Overnight Muscle Recovery*
  • 24g of slow-digesting micellar casein per serving
  • Nearly 5g of naturally occurring BCAAs
  • Ideal for use between meals and before bed
  • 110-120 calories per serving
M&S Rewards Logo
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.

M&S Promos and Deals Logo
Unbeatable Deals

We run the best deals and discounts on the biggest nutrition and fitness brands!

M&S Delivery Truck
Free Shipping on $99+ Orders*

Spend $99 to get FREE shipping in addition to our unbeatable deals! Plus, 100% money-back guarantee on every product we sell.

*USA Only. Excludes: AK, HI, orders above 25lbs and bulk orders.

Credit Card Logo for Refunds
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.

Mobile Phone Logo
Contact Us

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

Deals
20% DISCOUNT IN CART
20% DISCOUNT IN CART
Take an EXTRA 20% off ON Gold Standard 100% Casein 4lbs! No coupon needed, discount applied in cart.
20% DISCOUNT IN CART
20% DISCOUNT IN CART
Take an EXTRA 20% off ON Gold Standard 100% Casein 2lbs! No coupon needed, discount applied in cart.
Buying Options
$53.99 53.9900
2lbs
25 Servings | $2.16 Per Serving
20% DISCOUNT IN CART
+
$92.99 92.9900
4lbs
53 Servings | $1.75 Per Serving
20% DISCOUNT IN CART
+
 
Secure Transaction
Nutrition Info

2lbs Chocolate Peanut Butter

Serving Size: 34g (About 1 Scoop)
Servings Per Container: 25
Amount Per Serving
Amt
%%DV
Calories
120
Total Fat
1g
1%
Cholesterol
15mg
5%
Sodium
240mg
10%
Total Carbohydrate
4g
1%
Dietary Fiber
1g
4%
Total Sugars
1g
Includes 0g Added Sugars
0%
Protein
24g
48%
Calcium
500mg
40%
Iron
1.4mg
8%
Potassium
200mg
4%
Magnesium
85mg
20%
Zinc
11mg
100%
Not a significant source of saturated fat, trans fat and vitamin D.
* % 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 Powder (Processed with Alkali), Natural And Artificial Flavor, Salt, Gum Blend (Guar Gum, Gum Acacia, Xanthan Gum), Sunflower and/or Soy Lecithin, Magnesium Oxide, Acesulfame Potassium, Sucralose, Zinc Sulfate Monohydrate.
Allergen Warning
Contains: Milk and Soy.

Mix 1 scoop into 8 to 14 fluid ounces of cold water or milk using a shaker cup. For best results, mix up your shake 30 to 60 minutes after your workout, before bed, or use as an anytime snack.

For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and exercise program. Keep out of reach of children.

Directions
Warnings
Expand Info
Product Information

Beyond the Basics

  • 24 Grams of Protein per Serving to Help Build and Maintain Muscle*
  • Nearly 5 Grams of Naturally Occurring BCAAs per Serving to Support Endurance and Recovery*
  • Ideal for Use Between Meals and Before Bed
  • 40% of the Daily Value for Calcium per Serving
  • 110-120 Calories per Serving
  • 0.5-1 Gram of Fat per Serving
  • 1 Gram of Sugar per Serving

Casein, a slower digesting and absorbing protein can be used after exercise, between meals or before bed to help support satiety and muscle recovery. GOLD STANDARD 100% CASEIN™ delivers BCAAs to recovering muscles for several hours. By using only premium micellar casein as a protein source, we’ve created a protein powder that sets the GOLD STANDARD® for slow digesting protein support.

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.

Reviews
Overall Rating
4.7 out of 5 stars
Reviews (563)
Verified Buyers (542)
Review Graph
  • 5 star
    80%

  • 4 star
    15%

  • 3 star
    4%

  • 2 star
    0%

  • 1 star
    1%

Top Rated Flavors
  • Blueberries & Cream (5/5 )
  • Mint Chocolate Chip (4.9/5 )
  • Chocolate Supreme (4.8/5 )
  • Strawberry (4.7/5 )
  • Cookies & Cream (4.6/5 )
  • Creamy Vanilla (4.6/5 )
  • Chocolate Peanut Butter (4.6/5 )
  • 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
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
Eric R
Build Muscle
Verified Buyer
Amazing protein, only product I use. Everything else is inferior,*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-10-01 19:33:10Z
Loading
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Brett D
Verified Buyer
Very good casein but not as sweet tasting as I would like. Bakes well also*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-09-06 12:57:26Z
Loading
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Edlyne B
Burn Fat
Verified Buyer
It is neither good or bad! I like it as a late night dinner *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-08-08 22:42:16Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Cookies & Cream
  • Show More +
    Show Less -
User Image
Kristin Y
Verified Buyer
My favourite brand of Casien by far! The Chocolate Peanut Butter is delicious in my oatmeal!*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-07-23 18:28:09Z
Loading
Overall Rating
  • Chocolate Supreme
  • Cookies & Cream
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Kye C
Build Muscle
Verified Buyer
This protein is amazing! It mixes perfect with milk or water and can be used as a dessert in lieu of ice cream*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-07-18 09:21:13Z
Loading
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Joshua M
Sports Improvement
Verified Buyer
Optimum Casein never disappoints. Flavor is awesome. Mixes great. Gets the job done every time.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-07-05 14:56:53Z
Loading
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Bradley M
Verified Buyer
Insanely great price for my favorite slow digesting protien powder*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-07-05 14:56:53Z
Loading
Overall Rating
  • Creamy Vanilla
  • Show More +
    Show Less -
User Image
Donlupe
Build Muscle
Verified Buyer
Optimum Nutrition Gold Standard 100% Casein Creamy Vanilla Flavor is the best casein I've been ever used. High quality and tastes really good. Keeps me fed all night.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-05-31 14:47:30Z
Loading
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Bradley M
Verified Buyer
My new go to establishment for optimum nutrition, great price.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-05-16 10:44:39Z
Loading
Overall Rating
  • Chocolate Supreme
  • Show More +
    Show Less -
User Image
Brenton P
Verified Buyer
Taste great, works good. I'll keep buying and using this product.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2023-03-16 14:34:58Z
Loading
Loading
* 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.

Which products should we notify you about?


  • Loading product choices...
Text Message Alert
+1