100% Casein is a nighttime protein in the form of micellar casein. Thanks to this, it will supply your body with slowly digesting proteins that aid in the growth and maintenance of muscles. It is therefore perfect for every sportsmen. It is enriched with magnesium and zinc for a comprehensive effect, which helps to maintain the blood's testosterone levels within the normal range.
100% Casein is a nighttime protein containing slowly digesting proteins that support the growth and maintenance of muscle mass
100% Casein is a nighttime protein that contains slowly digestible proteins in the form of micellar casein. Over a few hours, it slowly breaks down into amino acids during digestion. It is especially excellent for those of you who want maximise support for muscle mass growth and maintenance.
These properties of the protein are mostly linked to its micellar structure, which breaks down in the digestive tract more slowly than is required for whey proteins.
In the ingredients list of the protein, you will also find minerals. The first one is magnesium, which promotes normal protein synthesis. Furthermore, it aids in the maintenance of healthy muscle function and the reduction of fatigue and exhaustion. Its effects are perfectly complemented by zinc, which promotes regular macronutrient metabolism in the form of proteins, carbohydrates, and fats. Furthermore, zinc helps in the maintenance of a healthy level of testosterone in the blood.
100% Casein, thanks to its properties is therefore perfect for anyone who strives for maximum support of muscle mass growth. All strength athletes, especially bodybuilders and weightlifters, will appreciate it. However, it is also appropriate if you want a snack with a high content of slowly digesting proteins.
It comes in the form of a powder that is highly soluble and only has to be combined with water. However, it also tastes fantastic when combined with milk, smoothies, oatmeal, and other meals as it adds flavour and enriches them with essential proteins. Ideal to take before bedtime or at any time during the day for longer periods of time without food.
100% Casein & its benefits
- nighttime protein in the form of micellar casein
- includes slowly digesting proteins
- each serving contains 24 g of protein
- a well-dissolved powder
- protein contributes to the growth and maintenance of muscle mass
- contains magnesium and zinc
- magnesium contributes to the reduction of fatigue
- thanks to zinc has a positive effect on the optimal level of testosterone in the blood
- supports muscle function thanks to zinc
- enriches porridge and other meals with quality proteins
- suitable for a wide range of athletes of different sports orientations
- appropriate in the evening, before sleep or during prolonged fasting.
Ingredients
Cookies & Cream flavour: Micellar casein (88%) [milk] (emulsifier: sunflower lecithin), flavouring [milk], chocolate powder (cocoa mass, sugar, fat-reduced cocoa powder, emulsifier: soy lecithin), sodium chloride, stabilizer (sodium carboxymethylcellulose), magnesium oxide, colour (caramel), sweeteners (sucralose, acesulfame K), zinc oxide.
Creamy Vanilla flavour: Micellar casein (88%) [milk] (emulsifier: sunflower lecithin), flavour [milk], sodium chloride, colour (curcumin), stabilizer (sodium carboxymethylcellulose), magnesium oxide, sweeteners (sucralose, acesulfame K), zinc oxide.
Strawberry flavour: Micellar casein (88%) [milk] (emulsifier: sunflower lecithin), flavour [milk], sodium chloride, stabilizer (sodium carboxymethylcellulose), magnesium oxide, sweeteners (sucralose, acesulfame K), colour (beetroot), zinc oxide.
Exclusive Chocolate flavour: Micellar casein (88%) [milk] (emulsifier: sunflower lecithin), flavouring [milk], sodium chloride, stabilizer (sodium carboxymethylcellulose), magnesium oxide, sweeteners (sucralose, acesulfame K), colour (beetroot), zinc oxide.
Recommended use
Mix 1 scoop (33 g) of protein in 300 ml of cold water and consume.
Nutrition facts
| Nutrition (Cookies & Cream) | 100 g | 1 serving (33 g) | *RDI (33 g) |
|---|---|---|---|
| Energy value | 1486 kj /355 kcal | 490 kj /117 kcal | 6 % |
| Fat | 2.5 g | 0.8 g | 1 % |
| saturated fatty acids | 1.5 g | 0.5 g | 3 % |
| Carbohydrate | 9.6 g | 3.2 g | 1 % |
| sugars | 5.7 g | 1.9 g | 2 % |
| Fibre | 1.3 g | 0.4 g | |
| Protein | 73 g | 24 g | 48 % |
| Salt | 1.5 g | 0.5 g | 8 % |
| Magnesium | 287 mg | 94.8 mg | 25 % |
| Zinc | 7.7 mg | 2.5 mg | 25 % |
| Nutrition (Creamy Vanilla) | 100 g | 1 serving (33 g) | *RDI (33 g) |
|---|---|---|---|
| Energy value | 1482 kj /354 kcal | 489 kj /117 kcal | 6 % |
| Fat | 1.8 g | 0.6 g | 1 % |
| saturated fatty acids | 1.2 g | 0.4 g | 2 % |
| Carbohydrate | 11 g | 3.8 g | 1 % |
| sugars | 4.2 g | 1.4 g | 2 % |
| Protein | 73 g | 24 g | 48 % |
| Salt | 1.4 g | 0.5 g | 8 % |
| Magnesium | 283 mg | 93.5 mg | 25 % |
| Zinc | 7.6 mg | 2.5 mg | 25 % |
| Nutrition (Strawberry) | 100 g | 1 serving (33 g) | *RDI (33 g) |
|---|---|---|---|
| Energy value | 1473 kj /352 kcal | 486 kj /116 kcal | 6 % |
| Fat | 1.8 g | 0.6 g | 1 % |
| saturated fatty acids | 1.1 g | 0.4 g | 2 % |
| Carbohydrate | 11 g | 3.6 g | 1 % |
| sugars | 4.3 g | 1.4 g | 2 % |
| Protein | 73 g | 24 g | 48 % |
| Salt | 1.4 g | 0.5 g | 8 % |
| Magnesium | 283 mg | 93.5 mg | 25 % |
| Zinc | 7.6 mg | 2.5 mg | 25 % |
| Nutrition (Exclusive Chocolate) | 100 g | 1 serving (33 g) | *RDI (33 g) |
|---|---|---|---|
| Energy value | 1463 kj /350 kcal | 483 kj /115 kcal | 6 % |
| Fat | 2.5 g | 0.8 g | 1 % |
| saturated fatty acids | 1.6 g | 0.5 g | 3 % |
| Carbohydrate | 5.8 g | 1.9 g | 1 % |
| sugars | 3.4 g | 1.1 g | 1 % |
| Fibre | 3.5 g | 1.1 g | |
| Protein | 74 g | 24 g | 49 % |
| Salt | 1.9 g | 0.6 g | 10 % |
| Magnesium | 283 mg | 93.5 mg | 25 % |
| Zinc | 7.6 mg | 2.5 mg | 25 % |
*The recommended daily intake value of an average adult (8400 kJ/ 2000 kcal).
Warning
May contain: gluten, egg, soy, nuts and peanuts. Store in a dry place and protect from heat.
Allergen information: Allergens are indicated in bold type in the ingredients.
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100% Casein - Optimum Nutrition
4.7Serhii
Сергей
Krzysztof
Verified purchase8/27/2026
Flavor: chocolate supremeAmazing taste, perfect consistency, excellent solubility! I will definitely be back!Was this review helpful to you?N. U.
Verified purchase8/26/2026
Flavor: chocolate supremeVery tasty and helps with recoveryWas this review helpful to you?A.K.
Verified purchase8/21/2026
Excellent taste and quality.Was this review helpful to you?I.L.
Verified purchase8/11/2026
Good smellWas this review helpful to you?S. P.
Verified purchase8/2/2026
Flavor: cookies & creamTop.Was this review helpful to you?Сергій П.
Verified purchase7/28/2026
Flavor: vanillagood qualityWas this review helpful to you?Bence S.
Verified purchase7/20/2026
Flavor: chocolateVery delicious.Was this review helpful to you?Andrei V.
Verified purchase7/17/2026
superbWas this review helpful to you?Tttt V.
Verified purchase7/16/2026
Flavor: banana creamgoodWas this review helpful to you?Cristian Ionut I.
Verified purchase7/14/2026
Flavor: chocolateIt is very difficult to mix.Was this review helpful to you?
FAQ
Optimum Nutrition 100% Casein is a nighttime protein powder primarily composed of micellar casein, which makes up 88% of the formula. As a slowly digesting protein, it is designed to provide a sustained release of amino acids to the body over a prolonged period. This gradual supply helps with the growth and maintenance of muscle mass. The product is also enriched with magnesium and zinc, with each serving delivering 24 g of protein to support athletic goals.
A single 33 g scoop of Optimum Nutrition 100% Casein provides 115 kcal and 24 g of protein. Each serving also contains 1.9 g of carbohydrates, of which 1.1 g are sugars. Additionally, the formula includes 0.8 g of fat per serving. These values contribute to the overall nutritional profile designed to support muscle maintenance.
Optimum Nutrition 100% Casein is specifically formulated as a nighttime protein due to its slow-digesting properties. The micellar casein provides a sustained release of amino acids, making it ideal for consumption before going to sleep. To prepare, mix one 33 g scoop with 300 ml of cold water. This timing helps support muscle tissue during the overnight recovery period.
Optimum Nutrition 100% Casein is not intended for children. The formula contains milk allergens and is not lactose-free, so it should be avoided by individuals with a milk allergy or severe lactose intolerance. This product is a food supplement and not a substitute for a balanced diet. Pregnant or breastfeeding women should consult their doctor before use. If you have any pre-existing medical conditions, speak with a healthcare professional before taking this supplement.
Optimum Nutrition 100% Casein is a protein powder derived from milk, with micellar casein as its primary ingredient. The formula is not lactose-free and contains milk, which is a common allergen. Individuals with a known sensitivity to dairy or lactose should be aware of these components. It is always wise to introduce new supplements gradually to assess personal tolerance. If you have concerns about potential side effects or have a pre-existing digestive condition, please consult with your doctor before using this product.
Optimum Nutrition 100% Casein is characterized by its slow-digesting micellar casein content, which affects its absorption rate. Research suggests that proteins with a slower absorption profile typically lead to a more gradual and sustained release of amino acids into the bloodstream compared to fast-acting proteins. This type of release profile generally corresponds to a more moderate metabolic response. For personalized advice regarding specific health conditions, it is best to consult a healthcare professional.
Optimum Nutrition 100% Casein is formulated to support the growth and maintenance of muscle tissue, delivering 24 g of protein per serving. Its primary ingredient, micellar casein, is a slow-release protein that provides a sustained supply of amino acids to the muscles for several hours. This makes it well-suited for consumption before bed to aid muscle recovery overnight. The formula also contains zinc, which helps maintain normal testosterone levels in the blood.
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