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Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla
Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla

Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla

$70.99

(8,035 reviews)

Optimum Nutrition Gold Standard 100% Whey Protein Supplement is one of the world's best-selling whey protein. Gold Standard 100% Whey Protein contains Whey Isolates (WPI) with a rated 90% pure protein - One of the purest and most expensive form of whey protein that exists. As a primary protein source, the Optimum Nutrition whey protein isolates squeeze an amazing 24 grams of the purest, muscle building protein available into each serving. Whey protein is essential to the growth of muscles, without the fat, cholesterol and lactose that is not necessarily required. These Optimum Nutrition protein supplements are absorbed into your system to aid muscle growth. Use first thing in the morning and/or during the 30 minutes just before or immediately after training. Each tasty serving of Gold Standard 100% Whey also contains 5.5g branched chain amino acids and only 1g of fat, sugar and 3g of carbs.

Optimum Nutrition Gold Standard 100% Whey Protein Supplement is one of the world's best-selling whey protein. Gold Standard 100% Whey Protein contains Whey Isolates (WPI) with a rated 90% pure protein - One of the purest and most expensive form of whey protein that exists. As a primary protein source, the Optimum Nutrition whey protein isolates squeeze an amazing 24 grams of the purest, muscle building protein available into each serving. Whey protein is essential to the growth of muscles, without the fat, cholesterol and lactose that is not necessarily required. These Optimum Nutrition protein supplements are absorbed into your system to aid muscle growth. Use first thing in the morning and/or during the 30 minutes just before or immediately after training. Each tasty serving of Gold Standard 100% Whey also contains 5.5g branched chain amino acids and only 1g of fat, sugar and 3g of carbs.

Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla

(8,035 reviews)

Optimum Nutrition Gold Standard 100% Whey Protein Supplement is one of the world's best-selling whey protein. Gold Standard 100% Whey Protein contains Whey Isolates (WPI) with a rated 90% pure protein - One of the purest and most expensive form of whey protein that exists. As a primary protein source, the Optimum Nutrition whey protein isolates squeeze an amazing 24 grams of the purest, muscle building protein available into each serving. Whey protein is essential to the growth of muscles, without the fat, cholesterol and lactose that is not necessarily required. These Optimum Nutrition protein supplements are absorbed into your system to aid muscle growth. Use first thing in the morning and/or during the 30 minutes just before or immediately after training. Each tasty serving of Gold Standard 100% Whey also contains 5.5g branched chain amino acids and only 1g of fat, sugar and 3g of carbs.

Optimum Nutrition Gold Standard 100% Whey Protein Supplement is one of the world's best-selling whey protein. Gold Standard 100% Whey Protein contains Whey Isolates (WPI) with a rated 90% pure protein - One of the purest and most expensive form of whey protein that exists. As a primary protein source, the Optimum Nutrition whey protein isolates squeeze an amazing 24 grams of the purest, muscle building protein available into each serving. Whey protein is essential to the growth of muscles, without the fat, cholesterol and lactose that is not necessarily required. These Optimum Nutrition protein supplements are absorbed into your system to aid muscle growth. Use first thing in the morning and/or during the 30 minutes just before or immediately after training. Each tasty serving of Gold Standard 100% Whey also contains 5.5g branched chain amino acids and only 1g of fat, sugar and 3g of carbs.

$70.99 - $230.94

in 12 offers

The lowest price for Optimum Nutrition Gold Standard 100% Casein 2 lbs Creamy Vanilla right now is $70.99 at Muscle & Strength, compared across 12 retailers.

The all-time low was $54.15 on 1 May 2026 — today's price is 31% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 9 June 2026.

Size:

3.97 lbs
4 lbs

Variety:

Banana
Chocolate Peanut Butter
Chocolate Supreme
Cookies & Cream
Cookies And Cream
French Vanilla
Vanilla

Price comparison

Price data powered by pricesAPI.io

Last updated at 09/06/2026 18:13:56

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Muscle & Strength

$70.99

Optimum Nutrition Gold Standard 100% Casein - 2lbs Creamy Vanilla

Delivery $32.99

Supplement Superstore

$71.90

Gold Standard 100% Casein - 26 Serves (909g) / Vanilla

Free next-day delivery

Supplements.co.nz

$74.46

Optimum Nutrition 100% Gold Standard Casein 2lb Vanilla

Delivery $12.38

Mr Supplement

$74.95

Optimum Gold Standard 100% Casein - 825g / 25 Serves Creamy Vanilla

Delivery between Thu – Fri $9.95

Chemist Direct

$75.95

Optimum Nutrition Gold Standard 100% Casein Protein Vanilla 825g

Delivery between Fri – Tue $9.95

Supplement Wholesalers

$79.99

ON Gold Standard 100% Casein Protein by Optimum Nutrition 909g / Creamy Vanilla

Delivery $9.95

Supplement Warehouse

$80.70

Gold Standard 100% Casein by Optimum Nutrition 2lbs / Creamy Vanilla

Delivery $12.90

Nutrition Warehouse

$89.95

Gold Standard 100% Casein by Optimum Nutrition, 825g | 25 Serves / Creamy Vanilla

Delivery between 15–22 June $9.95

Supps247

$89.95

Gold Standard 100% Casein by Optimum Nutrition - Supplements | Supp... 2 lb / Creamy Vanilla

Wicked NRG Supplements & Nutrition Store

$89.95

Optimum Nutrition Gold Standard 100% Casein 2lb / Vanilla

Delivery $9.95

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

2 Gold Standard Casein Protein
29 December 2019Vincent

originally posted on aminoz.com.au

For too long I had relied solely on whey protein to help build muscle, especially after intense work outs. It definitely helped, but often times I would wake up the morning after not feeling that much better. In other words, I wasn't really recovering that well. I considered just doubling up on the whey, basically eating another serving before bed, but then I did some research. I figured it would benefit me to alternate the types of protein supplement, and when I added the Optimum Nutrition Casein protein, it was a game changer. I now wake up in the morning feeling back to 100%. Even though I never train the same muscle groups two days in a row, I feel as if I could. I am making a 100% recovery in less than half the time. As a side benefit, the stuff tastes amazing. ... MoreFor too long I had relied solely on whey protein to help build muscle, especially after intense work outs. It definitely helped, but often times I would wake up the morning after not feeling that much better. In other words, I wasn't really recovering that well. I considered just doubling up on the whey, basically eating another serving before bed, but then I did some research. I figured it would benefit me to alternate the types of protein supplement, and when I added the Optimum Nutrition Casein protein, it was a game changer. I now wake up in the morning feeling back to 100%. Even though I never train the same muscle groups two days in a row, I feel as if I could. I am making a 100% recovery in less than half the time. As a side benefit, the stuff tastes amazing. I mix mine with soy milk (yeah, I drink soy, get over it) and shot of light cream, after reading that a modest amount of fats help the body absorb large amounts of protein. Anyways, the vanilla is a very deep and satisfying flavor. To change it up I sometimes add some cinnamon powder, or some nutmeg and ground clove. On top of that, I eat it just before bed, and I am never super hungry in the morning, and I have eliminated my midnight snack routine. I use a hand crank egg beater to mix this stuff up, because even a little bit quickly turns into a thick mixture, sort of like wet concrete. It needs way more liquid to dissolve into than whey protein powder. Sometimes I also throw in some Greek style yogurt, but this stuff is thick enough already. The labeling says something about how Casein behaves differently when it hits the acid in the stomach, and that it expands, and you see this when you mix it up. If you have been missing something in the protein department, I would absolutely try this Casein.

Best quality casein!
26 March 2023Luke A.

originally posted on discount-supplements.co.uk

Such a great supplement for bodybuilding. Really pleased with the quality, having tried other brands like myprotein which are cheaper but very poor in quality compared to Optimum Nutrition. Blends well with no mess or froth. Great to have before bed for best use. Would recommend again! Strawberry flavour is amazing!

Delicious chocolatey taste
21 February 2023Christopher G.

originally posted on getyokd.com

Optimum's chocolate casein has a delicious taste, take it from a chocoholic. Something special about the casein is it gives your shake or pudding a very thick texture. Much more than any other protein powder I've used. Best to use casein as a meal replacement or before bedtime snack.

Specification

Servings Per Container27
Calories120
Calories from Fat10
Total Fat1 g
Saturated Fat0.5 g

Price comparison

Updated about 21 hours ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Muscle & Strength

$70.99

Optimum Nutrition Gold Standard 100% Casein - 2lbs Creamy Vanilla

Delivery $32.99

Supplement Superstore

$71.90

Gold Standard 100% Casein - 26 Serves (909g) / Vanilla

Free next-day delivery

Supplements.co.nz

$74.46

Optimum Nutrition 100% Gold Standard Casein 2lb Vanilla

Delivery $12.38

Mr Supplement

$74.95

Out of stock

Optimum Gold Standard 100% Casein - 825g / 25 Serves Creamy Vanilla

Delivery between Thu – Fri $9.95

Chemist Direct

$75.95

Optimum Nutrition Gold Standard 100% Casein Protein Vanilla 825g

Delivery between Fri – Tue $9.95

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

2 Gold Standard Casein Protein
29 December 2019

For too long I had relied solely on whey protein to help build muscle, especially after intense work outs. It definitely helped, but often times I would wake up the morning after not feeling that much better. In other words, I wasn't really recovering that well. I considered just doubling up on the whey, basically eating another serving before bed, but then I did some research. I figured it would benefit me to alternate the types of protein supplement, and when I added the Optimum Nutrition Casein protein, it was a game changer. I now wake up in the morning feeling back to 100%. Even though I never train the same muscle groups two days in a row, I feel as if I could. I am making a 100% recovery in less than half the time. As a side benefit, the stuff tastes amazing. ... MoreFor too long I had relied solely on whey protein to help build muscle, especially after intense work outs. It definitely helped, but often times I would wake up the morning after not feeling that much better. In other words, I wasn't really recovering that well. I considered just doubling up on the whey, basically eating another serving before bed, but then I did some research. I figured it would benefit me to alternate the types of protein supplement, and when I added the Optimum Nutrition Casein protein, it was a game changer. I now wake up in the morning feeling back to 100%. Even though I never train the same muscle groups two days in a row, I feel as if I could. I am making a 100% recovery in less than half the time. As a side benefit, the stuff tastes amazing. I mix mine with soy milk (yeah, I drink soy, get over it) and shot of light cream, after reading that a modest amount of fats help the body absorb large amounts of protein. Anyways, the vanilla is a very deep and satisfying flavor. To change it up I sometimes add some cinnamon powder, or some nutmeg and ground clove. On top of that, I eat it just before bed, and I am never super hungry in the morning, and I have eliminated my midnight snack routine. I use a hand crank egg beater to mix this stuff up, because even a little bit quickly turns into a thick mixture, sort of like wet concrete. It needs way more liquid to dissolve into than whey protein powder. Sometimes I also throw in some Greek style yogurt, but this stuff is thick enough already. The labeling says something about how Casein behaves differently when it hits the acid in the stomach, and that it expands, and you see this when you mix it up. If you have been missing something in the protein department, I would absolutely try this Casein.

Vincent originally posted on aminoz.com.au
Best quality casein!
26 March 2023

Such a great supplement for bodybuilding. Really pleased with the quality, having tried other brands like myprotein which are cheaper but very poor in quality compared to Optimum Nutrition. Blends well with no mess or froth. Great to have before bed for best use. Would recommend again! Strawberry flavour is amazing!

Luke A. originally posted on discount-supplements.co.uk
Delicious chocolatey taste
21 February 2023

Optimum's chocolate casein has a delicious taste, take it from a chocoholic. Something special about the casein is it gives your shake or pudding a very thick texture. Much more than any other protein powder I've used. Best to use casein as a meal replacement or before bedtime snack.

Christopher G. originally posted on getyokd.com
Favor is meh, not worth the price
18 December 2021

I was looking for a nice flavor high quality casein, to fill my daily protein intake. Wanted to make a sweet pudding casein, as a replacement for some milk product (cottage cheese, yogurt). It is mixed ok (water/milk), but flavor is meh. Did not enjoy it. It is not nearly as tasty as ON whey powders. Also, the price was recently went up very sharply (twice in the last 2 months) for all ON products (why so sharp), which made it very expensive. Not worth it. Choose another brand over this.

iHerb Customer originally posted on iherb.com
Great taste
16 October 2021

I'm relatively new to the protein powder game, but this stuff is great. Even with just water it has a nice creamy texture and great flavor. I usually mix it with coffee and oat milk though, and it's terrific. My girlfriend also made a protein dessert bar with them and it tasted really good. I don't know how to quantify the effects in all honesty. But for me this works and tastes great. Oh and I got the chocolate flavor just for reference

Tim originally posted on shoppopeyes.com
I've been using this product
18 April 2021

I've been using this product for almost 5 years and it was the best casein I've ever tasted. Up untill the latest redesign of the product. The label is just a bit different so it's not that obvious, but as soon as you open the box you can notice a completely different product inside. _x000d_ _x000d_ The powder is no longer a bit 'grainy', but smooth like wheat powder. The smell is almost the same. The old product you could mix it just with a spoon easily. In milk or water. Now with the new product it's almost impossible. Powder sticks to everything._x000d_ _x000d_ I'll never buy this product again._x000d_ _x000d_ Note: I'm from Europe and I know it's produced in the UK or Ireland for our market, so maybe in the US you're lucky and they didn't ruin the product

originally posted on bodybuilding.com
Loved it till they raised the price massivly
7 November 2022

My son uses this to cook so many of his healthy foods with. He loves it only the last 8 purchases we wondered why it went from $39 to over $55 bucks plus or including tax. We are now going to stop buying from here due to the inflation and go with another product. Sad because we were an every 2 day buyer of this product. Like I said my son loves to be healthy and make healthy yet bad for you looking treats so we stick to healthy over junk. He is 17 and so into this product abd whey protien that he has taught himself so many cool ways to cook. Bake, and use this. Sad to have to go somewhere else for it.

Healthy lover originally posted on Academy Sports + Outdoors
Smells like SunBum spray sunblock
2 October 2022

This smells like SunBum spray sunblock -- tropical, coconut-ish. It's not a bad smell (especially for sun block). But it's off-putting for a food item. It is easy to mix (much easier than the out-of-stock-for-months Beyond Raw ISO Casein PM). Flavor is okay, not terrible. And I could get used to it if I had to. The picture of the ingredients label still shows Yellow #5 but I don't see it on there now, so that's good. Am going to try something else (and since everything at GNC is out of stock re: casein that means a completely different brand). If I had to come back to using this I would.

BRIAN originally posted on gnc.com
Weird consistency, even more weird taste
2 August 2019

IDK how this casein keeps getting such high reviews. Compared to Kaged Muscle (Vanilla) this is garbage. The flavor is just awful. It’s like an artificial vanilla almond? Also, the consistency in the of it (before mixing) is very fine; to ONs whey & and hydro-whey (which I use and enjoy). I’ve not had a problem getting it to mix. Either shake more or don’t use ice cold water! Add ice after it’s mixed.... Bing search “consistency for casein powder: Casein protein powder’s ability to clump up is useful for more than just slow digestion. When the proteins in casein form a clump in the stomach, they keep you feeling full for a longer time. Since that casein powder clump takes up space in the stomach, those hunger signals will be delayed. I would’t recommend this stuff. ... MoreIDK how this casein keeps getting such high reviews. Compared to Kaged Muscle (Vanilla) this is garbage. The flavor is just awful. It’s like an artificial vanilla almond? Also, the consistency in the of it (before mixing) is very fine; to ONs whey & and hydro-whey (which I use and enjoy). I’ve not had a problem getting it to mix. Either shake more or don’t use ice cold water! Add ice after it’s mixed.... Bing search “consistency for casein powder: Casein protein powder’s ability to clump up is useful for more than just slow digestion. When the proteins in casein form a clump in the stomach, they keep you feeling full for a longer time. Since that casein powder clump takes up space in the stomach, those hunger signals will be delayed. I would’t recommend this stuff. I you enjoy it, cool. Different strokes for different folks

Chris originally posted on vitaminshoppe.com
Works Great for Protein Ice Cream!
9 August 2021

I’m getting into making my own ice cream and tried with their whey protein powder with almond milk. Something just always seemed off. I decided to try it using casein because I heard casein has a thicker consistency and omg! Game changer! The mix was nice, creamy and thick! With the whey, it seemed watery and the taste was a little off. With this, I honestly could not tell that it was protein powder. I let my husband taste the ice cream and he thought I bought it! Absolutely delicious. Who knew ice cream good be so healthy and taste so good!

NicheleJ originally posted on walmart.com

Specification

Servings Per Container27
Calories120
Calories from Fat10
Total Fat1 g
Saturated Fat0.5 g

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