Optimum Nutrition Gold Standard 100% Casein

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  • 100% micellar casein for slow, sustained protein release
  • No artificial flavors, sweeteners, or colors
  • Supports muscle recovery and prevents muscle breakdown
  • Ideal for bedtime or between meals
  • Helps maintain lean muscle mass
  • 24g of high-quality protein per serving
  • Orders over $75 get free shipping

The Optimum Nutrition’s Gold Standard 100% Micellar Casein provides a slow-digesting, anti-catabolic protein source to help achieve your health and fitness goals. Its natural formula supports muscle recovery and rebuilds torn muscle fibers while you sleep.

Manufacturer: Optimum Nutrition
Category: Post-workout,Casein

SKU: BBR196 Category: Brand:

Pros & Cons of Optimum Nutrition 100% Casein Standard

What We Like …

  • Provides essential aminos for recovery
  • Enhances energy and metabolic support
  • Uses high-quality, tested ingredients
  • No proprietary blends or fillers
  • Great-tasting ready-to-drink option

What Needs Improvement …

  • More flavor options would be nice
  • Some may prefer powdered form

Product Summary

The Optimum Nutrition’s Gold Standard 100% Micellar Casein is a premium slow-release protein powder ideal for bedtime or between meals. It delivers 24g of high-quality micellar casein per serving to provide a sustained supply of amino acids to muscles over a prolonged period.

This natural formula contains no artificial flavors, sweeteners, or colors. It’s designed to help rebuild torn muscle fibers and prevent catabolism (muscle breakdown) while you sleep or during extended periods without food.

Gold Standard 100% Micellar Casein Specs

Key Ingredients Micellar Casein, Cocoa (chocolate flavor)
Serving Info 53 servings per tub
Flavor Chocolate Peanut Butter, Chocolate Supreme, Cookies & Cream, Creamy Vanilla
Guarantee 30-days money-return guarantee
Dose 1 Scoops (34g) daily, preferably before bed
Special Ingredients Branched-Chain Amino Acid, Green Tea Leaf Extract
Item Form Powder
Item Weight 2lb, 4lb
Type Post-Workout supplement

Asked A Questions for Optimum Nutrition Gold Standard 100% Casein

Q. When should I take this casein protein?

A. It’s best taken before bed or between meals when you’ll go an extended period without food to prevent muscle breakdown.

Q. Can I use this as my only protein source?

A. No, it’s recommended to use a faster-absorbing whey or blend with meals and for post-workout recovery. Casein should supplement those proteins.

Q. Is this good for weight loss?

A. While not specifically a weight loss product, the slow protein release can promote feelings of fullness which may aid weight management when combined with a calorie-controlled diet.

Q. How do I take it?

A. Mix 1 scoop (34g) with 10-12 oz of cold milk, water, or your beverage of choice. A shaker cup or blender works well.

Q. Does it contain lactose?

A. It contains only trace amounts of lactose since it’s produced from milk using an ultra-filtering process.

Q. How long is one container good for?

A. The 4lb tub contains about 49 servings, so it could last over a month and a half with once-daily use.

About the Brand

The Optimum Nutrition is dedicated to providing high-quality supplements that support individuals in achieving their fitness and health goals.

Optimum Nutrition

Owner: Glanbia Global Nutrition

The Optimum Nutrition offer trusted, high-quality protein powders, pre-workouts, and recovery drinks. Fuel your workouts and optimize results with science-backed formulas.

Shop the Brand


  1. Zach Lent

    The ingredients seem decent to good quality, but the flavors I’ve tried, like cookies & cream and chocolate, aren’t the greatest. Cookies & cream mix well, but in taste, it may be not. Chocolate doesn’t blend smoothly and clumps easily, but it tastes better than cookies. ON’s ingredients are solid, but I might mix in some peanut butter powder or cinnamon for better flavor.

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