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Optimum Nutrition Gold Standard 100% Casein


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Optimum Nutrition Gold Standard 100% Casein provides a slow-digesting protein source with pure micellar casein.

Ideal for night-time use, it supports sustained muscle protein synthesis and recovery. Fuel overnight recovery with Gold Standard 100% Casein.

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Product Description:

Product Description:

Optimum Nutrition Gold Standard 100% Casein

In the pursuit of optimal muscle development and recovery, the timing and quality of protein intake are critical factors. Optimum Nutrition understands this and introduces Gold Standard 100% Casein. A premium protein supplement designed to provide a sustained release of amino acids, particularly during periods of rest such as sleep.

Why Choose Optimum Nutrition Gold Standard 100% Casein?

  • Sustained Release of Amino Acids: The key benefit of Gold Standard 100% Casein lies in its ability to deliver a prolonged release of amino acids. This slow digestion mimics the natural release of nutrients from whole foods, providing a sustained elevation of amino acids for up to several hours.
  • Ideal for Night-time Use: Night-time is a period of extended fasting for most individuals. Gold Standard 100% Casein serves as an excellent protein source, supplying the muscles with amino acids throughout the night. This supports muscle protein synthesis and minimizes the risk of muscle breakdown.
  • Muscle Recovery and Growth: The amino acids delivered by micellar casein are essential for promoting muscle recovery and growth. This makes Gold Standard 100% Casein an invaluable tool for individuals engaged in strength training or endurance activities.
  • Reduced Muscle Protein Breakdown: By providing a slow and steady supply of amino acids, Casein helps reduce muscle protein breakdown. This anti-catabolic effect contributes to overall muscle preservation and is ideal during periods of caloric deficit or intense training.
  • Enhanced Feeling of Fullness: The gel-like consistency formed by micellar casein in the stomach can contribute to a feeling of fullness. This can be beneficial for individuals aiming to manage their appetite or support weight management goals.

Optimum Nutrition Gold Standard 100% Casein sets the benchmark for night-time protein supplementation. By harnessing the power of micellar casein, it provides a sustained release of amino acids, supporting muscle recovery and growth during crucial rest periods. Elevate your night-time nutrition with the gold standard—Gold Standard 100% Casein.

Serving Size: 1 Scoop (33 g) – Servings Per Container: 33

Ingredient Per (100 g) Per (33 g)
Energy 1482 kJ/354 kcal 489 kJ/117 kcal
Fat 1.8 g 0.6 g
of which Saturates 1.2 g 0.4 g
Carbohydrate 11 g 3.8 g
of which Sugars 4.2 g 1.4 g
Fibre 0 g 0 g
Protein 73 g 24 g
Salt 1.4 g 0.46 g
Magnesium 283 mg 93.5 mg
Zinc 7.6 mg 2.5 mg

How to use Optimum Nutrition 100% Casein:

  1. Add 1 scoop (33g) to 300 – 360 ml of cold water and stir until powder is completely dissolved.
  2. Can also added to smoothies, protein balls, muffins, porridge or other meals as another great way to get a protein hit.

Optimum Nutrition 100% Casein Ingredients:

  • Micellar Casein (Milk): The sole ingredient in Gold Standard 100% Casein, micellar casein is a high-quality protein derived from milk. Micellar casein is slow-digesting and forms a gel-like structure in the stomach, allowing a gradual release of amino acids into the bloodstream.

Allergen Information:

Suitable for most dietary preferences and restrictions. However, if you have known allergies or specific dietary concerns, it’s advisable to consult with a healthcare professional before incorporating this product into your fitness routine. Produced in a facility which processes products containing nuts, milk, gluten, egg, soya, shell fish and peanuts.


  • Stick to the recommended serving size, and avoid exceeding it.
  • Intended for individuals aged 18 and older.
  • Discontinue use and seek advice from a healthcare professional if you experience any adverse reactions.
  • Not recommended for pregnant or nursing mothers.
  • Keep out of reach of children.
UK & Ireland Shipping

Free UK Mainland delivery on all orders over £50.00.

Orders under £50.00 will be charged at a flat rate of £3.98.

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