Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate
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4.5 out of 5 stars with 177 reviews
5 out of 5 stars
16 October, 2025
originally posted on optimumnutrition.com
Serious mass protein power
I love this stuff! It taste so good and it helps me achieve my goals.
5 out of 5 stars
4 August, 2025
originally posted on optimumnutrition.com
Good Chocolate Taste
taste very good, great for wanting to gain weight.
1 reply from Optimum Nutrition team - 5 months ago
When we say Serious Mass, we mean it! 👍
5 out of 5 stars
27 July, 2025
originally posted on optimumnutrition.com
Wooo!
Great for mass!! This is what you need if you want to get the real gains
5 out of 5 stars
25 June, 2025
originally posted on optimumnutrition.com
Double Chocolate
Tastes amazing and mixes very well in shaker bottle
5 out of 5 stars
2 June, 2025
originally posted on optimumnutrition.com
Serious muscle growth
I've packed on 35lbs of muscle using this product along with weight training. I highly recommend it for a boost in muscle growth.
5 out of 5 stars
19 February, 2025
originally posted on influenster.com
The best during my gym journey
[This review was collected as part of a promotion.] Optimum Nutrition Mass Gainer in Chocolate is a delicious and effective way to boost your calorie intake. It has a rich, smooth chocolate flavor that makes it enjoyable to drink, and it blends easily without clumps. Packed with a good balance of protein, carbs, and essential nutrients, it helps support muscle growth and recovery. Overall, it’s a great choice for those looking to gain weight or build muscle.
1 reply from Optimum Nutrition team - 11 months ago
We settle for nothing less than the best and we're happy to hear Serious Mass is a great addition to your routine! 🙌🙌
5 out of 5 stars
7 January, 2025
originally posted on optimumnutrition.com
Great Taste & Texture. Effective.
Long-time Serious Mass user. I use it as a meal replacement for days when my schedule is jam packed and getting lunch is not an option. Tastes great. Quells my hunger and keeps my muscles fed.
1 reply from Optimum Nutrition team - 1 year ago
We're glad to hear your review as an experienced user of Serious Mass! We're delighted to hear Serious Mass has come in handy during your busy schedule!
5 out of 5 stars
30 December, 2024
originally posted on influenster.com
VERY YUMMY RECCOMEND
[This review was collected as part of a promotion.] Taste really good and it’s very easy to mix and it’s defiantly working the texture is also good and very nice and smooth once mixed and it’s definitely worth its value
5 out of 5 stars
23 December, 2024
originally posted on influenster.com
i need more
[This review was collected as part of a promotion.] super amazing omg i need another one rn i just finished mine!!! it helped me create muscle mass very healthily since i don’t gain weight easy. its great and it lasted so long. tastes yummy like cake!!
1 reply from Optimum Nutrition team - 1 year ago
We're glad to hear that Serious Mass has been helpful in reaching your fitness goals! Congratulations and thanks for the wonderful review!
4 out of 5 stars
8 December, 2024
originally posted on influenster.com
Good taste
[This review was collected as part of a promotion.] The taste was better than I was expecting! I made a strawberry banana chocolate smoothie and it was good! Lots of protein for not too many calories and didn’t leave the smoothie too chunky.
1 reply from Optimum Nutrition team - 1 year ago
Great photo! We're excited to see that Serious Mass has met your expectations and we appreciate the review!
5 out of 5 stars
28 November, 2024
originally posted on optimumnutrition.com
Great all around
I started taking this to help me gain weight and help me eat more and within a week i already started gaining weight. and after a month it’s helped me gain 10 pounds, and I can eat more. The taste is great, it’s like a chocolate shake, I love it!
5 out of 5 stars
26 November, 2024
originally posted on influenster.com
So good
[This review was collected as part of a promotion.] This value pack is amazing. It tastes like chocolate milk and doesn’t have the artificial flavors like other powder. I really like the texture and the effectiveness
5 out of 5 stars
25 November, 2024
originally posted on influenster.com
Great Powder protein
[This review was collected as part of a promotion.] Hi, Me and my boyfriend really love the ON SERIOUS MASS CHOCOLATE 3Lb from Optimum Nutrition. It is so delicious and healthy. We been working out a lot and this protein helps us gain that extra muscles.
1 reply from Optimum Nutrition team - 1 year ago
Excited to see Serious Mass has been helpful in gaining additional muscle! Great progress!
4 out of 5 stars
19 November, 2024
originally posted on influenster.com
Great taste!!
[This review was collected as part of a promotion.] I was super excited to try this Optimum Nutrition protein powder! I had never tried this brand before. I was impressed with the overall taste of this protein powder! It was not chalky like some other brands I had tried. I am excited to see the results with consistent use of this product!!
5 out of 5 stars
13 November, 2024
originally posted on influenster.com
Taste good
[This review was collected as part of a promotion.] Works really good and also taste really good too I have tried other brands and this by far showed the best results faster I highly recommend this stuff
5 out of 5 stars
13 November, 2024
originally posted on influenster.com
BEST PROTEIN!!!
[This review was collected as part of a promotion.] The taste of this is amazing! Very much chocolate and a good texture. It blended nicely in my shaker bottle and I looked forward to making and drinking a shake. It is high calorie and full of protein and helped me achieve my goals for in and out of the gym!
3 out of 5 stars
12 November, 2024
originally posted on optimumnutrition.com
Good but flavour isn't the same
Two scoops can definetly be alot. The flavour is also thicker in a more negative way compared to the regular chocokate protein powder. It's still good, it's just not the phenomonal chocolate flavour that I've always enjoyed from them.
1 reply from Optimum Nutrition team - 1 year ago
Thanks for the review! Some users of Serious Mass opt to split the 2 scoops over the course of a day so that the entire serving does not have to be consumed in a single sitting.
4 out of 5 stars
11 November, 2024
originally posted on influenster.com
Best for Bulks
[This review was collected as part of a promotion.] This protein power is delicious! It is such a good way to help get in more calories for trying to bulk. The taste is also delicious on its own or even good with other fruits mixed in with it!
4 out of 5 stars
11 November, 2024
originally posted on influenster.com
Good
[This review was collected as part of a promotion.] I have already been using this brand and flavor hence why I already have one in the picture. I don’t feel bloated after taking these and it taste good if your a fan of chocolate. I would also use it and make over night oats/yogurt.
5 out of 5 stars
7 November, 2024
originally posted on influenster.com
New favorite!
[This review was collected as part of a promotion.] ON Serious Mass Chocolate is a great choice if you’re looking to add calories and bulk up. The shake mixes well, although it’s a bit thick, so using a blender helps. The chocolate flavor is decent—not overly sweet but satisfying. It’s packed with calories, protein, and vitamins, making it convenient for hard gainers. Just be prepared for a larger portion size!