Optimum Nutrition Serious Mass Reviews

Loaded with 1,250 Calories, 250g of Carbs, & 25 Vitamins and Minerals to Pack on Pounds*

View Product Info
Overall Rating
8.4
Out of 10
Good
1019 Total Ratings
Verified Buyer Rating:
8.6
377 Verified Buyer Ratings
Average Taste Rating:
7.8
View Flavor Ratings
6.6
Strawberry
9.1
Chocolate Peanut Butter
- -
Vanilla
8.2
Chocolate
7.6
Banana
7.5
Vanilla
1-20 of 1,019 Reviews

eviljonasguty's Rating
10/10

This is so good.



brianrorr's Rating
8/10
Chocolate Peanut Butter
8/10

Serious Mass was a little heavy on the carbohydrates, however it really helped me jumpstart getting into working out and into the gym. With one bag of Serious Mass over probably 6 months, I gained 10 pounds. Mostly of fat probably :D But I have kept that weight and built more muscle using now Natural Gold Standard whey. Thank you for the jump start! I stopped using this product because I wanted to manage my carb intake and get my carbs from eating food rather than a supplement.



RyanSayed92's Rating
2/10

Worst Product, Guys dont buy it . Horrible experience !!



Jarred98's Rating
10/10
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For about 12 months I had tried to gain weight. Being an ectomorph this was very, very hard for me. I thought I tried everything and then my friend suggested I try serious mass. My weight was around 112lb and for a 5 ft 8 guy that was tinyyyy. I didn't have any scales while using it and working out so I originally thought it wasn't working because didn't see any noticeable gains but just tonight my uncle told me how I looked a bit bigger. I bought a scale and weighed in at 134 pounds! For the first time since I was 9 I am not underweight according to bmi pages. I still look very skinny but this stuff has worked like a charm. If anyone is skeptical about getting this, don't be. It works. And trust me I went through a year of trying so much stuff. If a 112lb 18 year old with 5.5 inch wrists can do it then it's possible for everyone. Strawberry tastes like sh*t but I made smoothies out of them so wasn't bad afterwards. Chocolate is unbelievably good. Take 1 scoop in the morning, 1 with milk before bed and it bumped my daily intake up to 3,700 calories and 240g of protein. Love this stuff.



Jablackmamba's Rating
10/10
Chocolate Peanut Butter
10/10
Banana
10/10

Jablackmamba did not leave a written review for this product.



Jamcys's Rating
9/10
Strawberry
8/10

Jamcys did not leave a written review for this product.



chrisflem1's Rating
10/10

I highly recommend this product If you're trying to pack on some mass and gain some weight. I purchased four 12 pound bags and I gained 20 pounds and my strength skyrocket



elmagic12's Rating
10/10
Chocolate
10/10

elmagic12 did not leave a written review for this product.



Morse999's Rating
9/10

This stuff is the business. I have been using this for 2 weeks now (vanilla flavour) and already have gained 7lbs. Mind you I have beefed up my own "recipe" I use whole milk, and 2 scoops of vanilla ice cream and 2 scoops of Serious Mass into the blender. It makes a fabulous tasting shake that I have in between regular meals and the taste is excellent. No powdery aftertaste at all. It's filling so don't drink it before your meals. It WORKS a treat and I will be ordering more for sure.



simply8's Rating
7/10
Chocolate
8/10

It is a good gainer, however as somebody mentioned before, you are gaining lots of fat as well. I took less than half of dosage once a day for about 6 weeks and I gained some kilos, but not that lean of course. If you are in the gym 6 days per week and 1 day off, this is the thing for you, otherwise I would pick something with less calories. Mixing was all right and taste as well.



Ahmad202's Rating
10/10

I think is better than some prodets, it's helpful to get muscle



415stayloyal's Rating
10/10

415stayloyal did not leave a written review for this product.



kimani111's Rating
9/10
Chocolate
8/10

kimani111 did not leave a written review for this product.



buareshtaha's Rating
7/10
Strawberry
7/10

buareshtaha did not leave a written review for this product.



Mwokas83's Rating
10/10
Chocolate
10/10

This is my first time trying this product and I love it and it tastes great. I have the chocolate one and I highly recommend if you wanna gain muscle fast.



punnusingh's Rating
9/10
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i gave it to one of my skinny friend he gain 1kg in first week.



aaakens's Rating
10/10
Vanilla
8/10

I've been trying to gain weight for the longest and nothing seemed to work. I tried this out and took 2 scoops a day for 7 days straight along with 4 meals a day and moderate lifting for 4 days. I managed to gain 8 pounds during that short time. Next 2 weeks I didn't use the protein, didn't lift and ate about twice a day. In that time only lost 3 pounds. In my experience this products works and works well. The weight stayed on and wasn't temporary. Very pleased with this and will continue to buy more!



Michaeldoung's Rating
8/10
Chocolate Peanut Butter
8/10

I ordered this because I feel like no matter how much or what I eat, I never seem to gain weight. My metabolism is at lightning speed (which is a good thing) but I wanted to gain weight. I wanted to get bigger and buffer so i ordered the serious mass gainer. Honestly, this thing works FAST. I gained weight in a very short amount of time. 2 pounds in 1 week, taking one serving a day, 4-5 times a week. This is something u use if u need to gain weight fast. The one thing I hated was that it takes very very long to dissolve. If u shake in a blender bottle, be prepared to shake for 2-3 mins if u don't want any clumps. Personally, I like to blend it in a blender with water. Gets the work done real fast.



JocyH's Rating
10/10
Chocolate
10/10

I bought the choco peanut butter and it was good but after a while there was that bitter (?) taste from the PB that I got tired of.. I ordered the choco one and it's delicious! My 13 yr old who needs to gain weight thinks it's a milkshake and can't taste anything " strange" I love it!



Matiasalvarez's Rating
7/10
Chocolate
7/10

Im having the worst experience with this website. I ordered the 6llb chocolate flavor and it's been on back order for 3 weeks now. Terrible !!!


1-20 of 1,019 Reviews