Optimum Nutrition, Pro Gainer Protein Powder, Vanilla Custard 5.09lb
$84.99
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- $9.99 - $25.49Lower price on select items4.4 out of 5 stars with 1328 ratings
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Guests are saying
This product is highly regarded for its smooth texture and great taste, making it an excellent choice for guests looking to gain weight without excessive calories. Many appreciate its ability to mix well with various liquids, including water and almond milk, and its effectiveness in supporting lean bulking. While some guests noted a change in flavor, the overall consensus is that it is a reliable option for hard gainers and those seeking to manage their calorie intake effectively.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.7 out of 5 stars with 12 reviews
5 out of 5 stars
25 October, 2025
originally posted on optimumnutrition.com
Great
Good product smooth and not heavy at all. it’s easy mix and drink.
2 out of 5 stars
17 October, 2025
originally posted on optimumnutrition.com
The flavor is off
The flavor has changed and not for the better. It used to have a really good vanilla flavor now it tastes way off.
1 reply from Optimum Nutrition team - 7 months ago
We are sorry to hear of the experience you’ve had with GS Pro Gainer. We greatly appreciate you bringing your concern to our attention and will be reaching out shortly to resolve with you directly.
5 out of 5 stars
4 October, 2025
originally posted on optimumnutrition.com
Solid gainer
I’m a hard gainer but loved the high protein and I didn’t need the 1,300 calories like in other shakes. Putting on about .5 pounds per week since using! It tastes great as well
1 reply from Optimum Nutrition team - 8 months ago
Gains incoming! 💪
5 out of 5 stars
12 September, 2024
originally posted on optimumnutrition.com
Great overall product
I use this stuff to easily switch between bulking and cutting phases. I take two protein shakes per day and when I'm bulking I'll use about a half serving of this per shake, when I'm cutting I'll use a simple protein (I prefer egg white protein but ON gold standard is hard to argue with). It mixes well in both water and almond milk, even with a relatively small amount, goes down easy tastes good and doesn't bother my stomach like some protein powders do. Love the stuff and will definitely be buying more as needed
5 out of 5 stars
26 July, 2024
originally posted on optimumnutrition.com
Good Powder
Good taste. Mixes very well. Let’s see how the gains go!
5 out of 5 stars
22 July, 2024
originally posted on optimumnutrition.com
Tastes great. Works great.
Mixes great with whole or reduced fat milk. Good macros. I usually take half a serving immediately after working out. And half a serving in the morning before work. This helps if you want to keep your bulk relatively "clean." Been using it since I was 130 lbs. I'm now 158 lbs at 5' 7". A good diet and this gainer should get me to 170 lbs easy.
5 out of 5 stars
31 May, 2024
originally posted on optimumnutrition.com
Amazing product
I’ve been using the pro gainer for about a year and it’s the only gainer i’ll use or recommend, usually I would say you’re wasting your money buying gainers but this really is a great product.
5 out of 5 stars
28 February, 2021
originally posted on https://www.optimumnutrition.com
Very good product! Highly recommended
Great for hard gainers. Would recommend instead of regular mass gainers if you don't want to necessarily have too much liquid calories in your body.
5 out of 5 stars
19 February, 2021
originally posted on https://www.optimumnutrition.com
Would buy again
Taste good and doesn't make you feeling bloated
5 out of 5 stars
6 February, 2021
originally posted on https://www.optimumnutrition.com
Great Product and Tastes Great
Helps with getting my daily calories in.
4 out of 5 stars
23 January, 2021
originally posted on https://www.optimumnutrition.com
Yes I would buy again.
Great taste and helps combat late night hunger and cravings.
5 out of 5 stars
7 January, 2021
originally posted on https://www.optimumnutrition.com
One of the best mass gainers if not the best.
This product is great for a "lean" bulking, taste amazing, and dissolves well. One thing I noticed is that the serving scope included do not fit the serving size if 165 grams. If you want to get to 165g you are better off weighting it because the scope fits only around 100g. Other than that the product is great and I am loving it.