Short Dated Optimum Nutrition 100% Casein Protein With a Best By Date 09/23


Size: 4 Pounds

Sometimes slower is better – especially when it comes to the rate of protein digestion. While rapid protein absorption is desirable immediately before or after exercise, delayed release is probably more beneficial throughout the remainder of the day. 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 proteins. Casein is the most abundant protein present in milk. It is considered a high-quality protein because it is easily assimilated and it supplies sufficient quantities of amino acids that cannot be synthesized by the body.

Another benefit is increased satiety (feeling of fullness or satisfaction). Casein exerts a slight pressure on the stomach walls. In effect, this pressure signals to the

Size: 4 Pounds

Slow and steady wins the race - this also happens to be true in the protein race as well. Typically, athletes, bodybuilders, and fitness enthusiasts resort to Whey Protein for its fast-acting properties and benefits. But, when wanting a meal replacement, snack, or protein shake before bedtime, Whey protein just can't cut it! Therefore, in spite of finding a solution to the lacking timing of whey protein, Optimum Nutrition has Gold Standard 100% Casein.

The Benefits of Casein Protein

Although the most popular protein is Whey Protein for its fast rate of absorption, you can effectively only use Whey protein before and after exercise. Because of this, an extended-release protein is much more desirable and beneficial for daily or nightly uses. Casein protein is known to be pH sensitive, causing it to be digested more than twice as slow than Whey protein alone.

Casein is first found in the form of milk, as the most abundant protein derived from the milk. Due to its ability to assimilate very easily during digestion, Casein is considered a very high-quality source of protein.

Along with its benefits of slower digestion, Casein protein is known to cause a fullness far greater than Whey Protein. This fullness is both physical and mental; allow me to explain. Because of the slow digestion, it exhibits pressure onto the walls on the stomach, causing your body to send a signal to our brain that says your stomach is full.

With these numerous benefits of Casein Protein, the most important benefit by far is the slow and steady release of amino acids. This release occurs throughout the many hours it takes for your body to breakdown the Casein Protein, therefore our bodies receive amino acids to our muscles for hours

Casein Research

The Biore study is a clinical study performed on the effects Casein Protein has on the body.

The first set of results (perhaps the most important) shows that Casein causes a 31% increase in protein synthesis and reduces catabolism (muscle loss) by 34%. Along with these great pair of percentages, Casein was proven to increase Nitrogen balance for an average of 7 hours post-consumption!

The second set of results had shown that in the ingestion of Casein Protein vs. Whey Protein, individuals were shown to have lost almost 40% more fat and gained more than 50% more muscle by consuming Casein protein.

The results are in if you're ready to take your physique to the next level, then get Gold Standard 100% Casein by ON today!


Discuss with your physician before taking if you have a medical condition or are taking any prescription medications. Stop use and discuss with your physician if any negative effects occur. Do not exceed the suggested dose. Do not take if pregnant or lactating. Must be 18 years old to use this product. Keep away from children. Do not use if the seal has been tampered with. Store in a cool, dry place.

Allergen Statement: This product was made in a facility that processes Milk, Whey, Soy, and Fish. Contains Milk & Soy. Gluten-Free.

Supplement Facts

28 servings per container
Serving size
One heaping scoop
Amount per serving
Amount Per Serving
% Daily Value
Total Fat
1 g
Saturated Fat
0.5 g
10 mg
250 mg
Total Carbohydrate
4 g
Dietary Fiber
1 g
Total Sugars
1 g
23 g
450 mg
636 mg
830 mg
617 mg
Aspartic Acid
1523 mg
Phenylalanine –
1096 mg
76 mg
2320 mg
4744 mg
1338 mg
489 mg
996 mg
659 mg
280 mg
1257 mg
811 mg
2040 mg
1542 mg

Daily Value not established.

Other Ingredients:

Protein Blend (Micellar Casein, Calcium Caseinate), Cocoa (processed with alkali), Natural & Artificial Flavors, Salt, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan), Sucralose.

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Use ON 100% Casein Protein first thing in the morning, immediately before bed, in place of small meals, and/or any other time when delayed protein absorption is desired. To encourage a positive nitrogen balance, consume approximately 1 gram of protein per pound of body weight per day from a combination of high protein foods and supplements. For even better results, consume your daily protein allotment over several small meals spread evenly throughout the day.

Additional information

Weight 35.2 oz
Dimensions 10 × 6 × 6 in

4 Pounds