

💤 Fuel your gains while you rest — the ultimate overnight protein hack!
Optimum Nutrition Gold Standard 100% Casein is a premium slow-digesting protein powder delivering 24g of micellar casein and 10g essential amino acids per serving. Enhanced with zinc and magnesium, it supports muscle repair, immune health, and protein synthesis overnight. With 55 servings per tub and a smooth chocolate flavor, it’s designed for fitness-focused professionals seeking effective recovery and sustained muscle growth.
















| ASIN | B002DYJ0M0 |
| Age Range Description | Adult |
| Allergen Information | Contains: Milk, Soy |
| Benefits | muscle recovery |
| Best Sellers Rank | 3,885 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 2 in Casein Nutrition Protein |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Country Of Origin | United Kingdom |
| Customer Reviews | 4.4 out of 5 stars 12,502 Reviews |
| Diet Type | Keto |
| Diet type | Keto |
| Flavour | Chocolate |
| Global Trade Identification Number | 00748927024227 |
| Item Dimensions | 20.5 x 20.5 x 28.4 centimetres |
| Item Weight | 64 Ounces |
| Item height | 28.38 centimetres |
| Item weight | 64 Ounces |
| Manufacturer | OPTIG |
| Manufacturer Contact Information | 4 Waterside, Dublin 24, Ireland |
| Material Type Free | No Artificial Colors, No Artificial Flavors, No Artificial Sweeteners |
| Net Content Volume | 11.14 Litres |
| Number of Items | 1 |
| Package Type Name | Tub |
| Recommended Uses For Product | Post-Workout |
| Servings per container | 53 |
| Total Servings Per Container | 53 |
| UPC | 748927024227 |
| Unit Count | 1820.0 Grams |
R**T
5+ stars
Optimum Nutrition's Gold Standard 100% Casein is a top-tier product in the world of protein supplements. As someone who values slow-digesting protein sources, this product has been a game-changer for my fitness routine and overall nutrition. One of the standout features of this casein protein is its slow-release formula. It's perfect for those looking to maintain a steady supply of amino acids throughout the day or to support muscle recovery during the night. This slow digestion not only helps with muscle growth but also keeps me feeling fuller for longer, which is a great bonus if you're watching your calorie intake. The taste and mixability are impressive. It mixes easily with water or milk, creating a smooth and creamy shake without clumps. Quality is paramount when it comes to supplements, and Optimum Nutrition is a trusted brand known for its commitment to quality and purity. The Gold Standard 100% Casein is no exception. It's made from high-quality micellar casein, providing a clean source of protein without unnecessary fillers or additives. I also appreciate the versatility of this product. It's not just limited to shakes; I've used it in recipes like protein pancakes and yogurt, adding a delicious protein boost to my meals. While it's a bit pricier compared to some other protein options, the quality and performance make it worth the investment, especially if you prioritize slow-digesting protein for your fitness goals. Overall, Optimum Nutrition Gold Standard 100% Casein is a reliable and effective choice for those seeking a premium casein protein supplement.
H**K
Great taste and works well to relieve pain
I used this as a muscle pain reliever, worked almost immediately after first night use. It is very gelatenous when mixed in water or my preferred Milk. The powder does dissolve well and tastes great.
G**3
Nice taste, but thick texture. A bit difficult to dissolve for shakes but is brilliant to make protein pudding dessert!
My first attempt to make a protein shake with this Casein powder wasn't very successful, as it doesn't dissolve as well as whey protein, even with a shaker (I found that mixing it first in a bowl/glass with a small amount of liquid then adding more liquid is easier to dissolve it properly. I actually took advantage of the thick-high absorbing properties to use it to make protein pudding, with the following proportions: 20g of casein powder, 70ml of unsweetened almond milk (or other milk), 50g of fat-free yogurt, 3g of unsweetened cocoa powder, 5g of peanut butter, mix well and chill in the fridge for 30min at least, it will get smoother and thicken even more resulting in a delicious chocolate peanut butter mousse/pudding. It tastes like an indulgent dessert for only150kcal : 21g protein, 6g carbs of which 3g of sugar, 4g of fat (good unsaturated fat from the peanut butter). Being low in sugar, it's healthier than most desserts and it has also replaced my usual chocolate fix! I agree with another customer on a kind of "cappuccino"-like smell of the dry powder, but once dissolved the chocolate taste is nice. I have also tried the vanilla as a sample, which tastes like vanilla ice cream. Both are properly sweetened for most people taste I think, however I have cut my sugar consumption for the past two months and being more sensitive to any sweetness, I now find it a bit too sweet to my taste, but I will keep buying it anyway.
J**K
Good product
Can’t fault the fact that it does keep me feeling fuller for longer, as I don’t eat when I’m working (I’m a carpenter). But compared to normal whey protein this stuff is very dry tasting and a little powdery. Also it’s a super fine dust that sticks to absolutely everything if you spill it 😂 besides that it tastes good and can feel a difference
D**D
Good quality
Works well
G**L
Optimum nutrition gold standard 100% casin.
Very good for taking just before bed. It releases slow amino acids to keep your muscles fuel doing the night up to 7-8 hours. That's why I have casin just before bed.
D**S
What happened
I used the ON Casein regularly in the past but had to take a rest from training for a while. Now that I am back, I am disappointed that they have changed the formula. I used to wish to use this as my only protein supplement as the taste and mixability were excellent. What we have now is simply terrible in comparison. If you have not had it before, you may think it is fine, but it used to be so much better. This stuff used almost to mix itself, but now it is full of lumps that are hard to mix without a blender. I would no longer recommend this to anyone with the new flavour and difficulty to mix. This review relates to vanilla. However, sadly, I purchased the chocolate flavour too and felt the same about it, but I had not tried this before.
J**R
Tastes well
Didn’t receive this order but I’ve had it before. Usually tastes pretty well.
Trustpilot
1 month ago
1 month ago