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  • 24 Grams of Casein 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

Product Overview


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.




  • 24 Grams of Casein Protein per Serving to Help Build and Maintain Muscle

  • 100% of the protein from Micellar Casein, slow digesting for round the clock protein coverage
  • Nearly 5 Grams of Naturally Occurring BCAAs per Serving to Support Endurance and Recovery
  • Low levels of sugar (1 gram) and fat (0.5-1 gram) and less than 120 calories
  • Available in a range of different serving sizes and flavours Informed-choice certified product

Suggested Use

Casein is best enjoyed in the evening. Enjoy before bed to support muscle growth & repair while you rest or have it between meals as an anytime snack in your balanced diet. Mix 1 rounded scoop in 300-360 ml of cold water or milk using a shaker cup and stir, shake or blend for 30 seconds or until dissolved. For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplementation throughout the day as part of a balanced, diet and exercise program.

Nutritional Information

Nutritional information will be shown when a flavour and/or size is selected.

Customer Reviews

Overall Rating (4.8)
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Review by James Land on Sep. 16, 2021
I've used ON for years and it has helped with recovery after training. After increasing training to 5/6 days a week I've added ON casein to my nutrition on a night and I can feel the benefit on a morning, no aches on a morning. Tastes great and mixes easy.

Really nice

Review by Seb on Sep. 12, 2021
Very good product, 100% recomend and the flavor (strawberrry in my case) is tasty !

Super tasty

Review by Phil on Sep. 5, 2021
Tastiest protein I have tried, has really helped to ensure my body fully recovers between workouts. Means I can push stronger for longer!

Love this product!

Review by Rebecca Atkin on Sep. 4, 2021
Works great! It has made all the difference in our workouts!

Too dense and doesnt mix well

Review by Manish on Aug. 27, 2021
Does not mix nicely at all. I use a spoon to mix it with a glass of water. Of all the ON, product i have tries this one is the most difficult for me to swallow and mix.


Review by Marcelo on Aug. 26, 2021
Good flavour and excellent quality. I totally recommend!

Will buy again

Review by Anonymous on Aug. 24, 2021
I got the Cookies and Cream flavour. Tastes good and mixes well, forming a rich shake without being too gloopy or chalky. I'd recommend adding a fair amount of water to make sure you get a consistency that works for you, probably 300+ml; casein likes to form a gel when suspended in liquid (good micellar casein is supposed to do this). Also quite filling!

Excellent taste and consistency

Review by Fawad Karim on Jul. 31, 2021
I use ON Casein daily as directed. Great texture and always dissolves completely in about 250ml of water. I really like the taste and its properties of slow release of protein overnight. Great for me as an endurance runner who just can’t get enough protein during the day from meals and whey protein supplements.

Fantastic overnight Protein

Review by Gary Gorman on Jul. 29, 2021
I use this product every night to get that constant feed of slow release protein. Absolute game changer and tastes amazing

A bit sweet for my tastes, but otherwise excellent

Review by Anonymous on Jul. 20, 2021
I found the "Creamy Vanilla" flavor to be a bit more "white sheet cake" flavored than a true vanilla, and quite a bit sweeter than I would have liked. But otherwise it performs as exactly promised: Mixes quickly and thoroughly, creates a nice rich shake without being chalky, grainy, or unctuous, and the casein keeps you satiated for a decent amount of time. I like to blend mine with frozen fruit or berries for a nice summer smoothie, which is why the vaguely cheap-grocery-store-cake flavor overtones were somewhat disappointing. It's not horrible, especially considering some of the other shake brands I've tried. But as someone who is perpetually on the hunt for a minimally-sweet and more real vanilla tasting protein smoothie base, I likely won't buy this particular flavor again, and I really wish they offered an unflavored option in the casein version.