

💥 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a high-calorie weight gainer powder delivering 1,250 calories, 50 grams of protein, and over 250 grams of carbs per serving. Enhanced with creatine, glutamine, and 25 essential vitamins and minerals, it supports muscle growth, recovery, and immune health—perfect for professionals serious about leveling up their physique.






| ASIN | B0015R18SU |
| ASIN | B0015R18SU |
| Age Range Description | Adult |
| Allergen Information | Eggs, Hazelnuts, Milk, Peanuts |
| Best Sellers Rank | #1,166 in Health ( See Top 100 in Health ) #64 in Sports Supplements |
| Brand | Optimum Nutrition |
| Country of origin | USA |
| Country of origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (46,791) |
| Customer reviews | 4.2 4.2 out of 5 stars (46,791) |
| Date First Available | 7 August 2012 |
| Format | Powder |
| Is Discontinued By Manufacturer | No |
| Item model number | 1031913 |
| Manufacturer | Optimum Nutrition |
| Product Dimensions | 39 x 29 x 14 cm; 2.72 kg |
| Product Name | HEALTH_PERSONAL_CARE |
| Serving Recommendation | One Scoop |
| Storage Instructions | Store in a cool and dry place |
| Units | 2720 Grams |
| Weight | 7 Pounds |
H**L
this good
this good
H**L
هل يزيد بالوزن
Good product fast delivery
M**.
Will recommend
It works superbly
B**E
Fast delivery
Not sweet if you are someone who like tasty things though for me i don't use sugar so i prefer the taste cause before i was using other brand and i had to really dilute to reduce the sweetness, just received it today so lets see if it does what is written
M**M
Vanilla tastes awful
I bought the vanilla flavor and it’s one of the worse mass gainers I have drank, the after taste is very bad makes me gag. I have the full bottle and I can’t even return it
R**L
Works well for what it is
I bought this mass gainer two months so I can gain weight and put on muscle mass. Let me tell you it worksssss! Over the two months I’ve been taking it I’ve noticed noticeable size gains across my entire body. Though one thing if you were to take this and not train with intensity you’ll gain fat but me since I train five days a week with high intensity per session this mass gainer works very well as my post workout shake and helped significantly to put on muscle mass as well.
A**N
Loved it
Buy it
W**M
Exceeded
Exceeded expectations, beautiful test, now the gains begin in-shaa-Allah
N**H
Good
M**D
منتج ممتازة وخدمة ممتازة من البائع ظهر الفرق خلال 3 أيام مع التمرين بس للتوضيح اهم حاجة الاستمرار
S**M
I’ve used this product on and off over several years. It really is good not full of garbage like you can find in other products of a similar nature. It’s a very well trusted brand vanilla or banana is my favorite as they both taste really good. You can probably use half of the recommended serving each time and still get great results. Just stick to a really good eating plan and you’ll feel the benefits of this.
M**E
muy bien
ア**M
増量にはこれ。 同じブランドの他のプロテインも使用していましたが筋肉を大きく作るにはやはりこの高カロリーバージョンですね 混ざりづらいのでミキサーを使うといいですね。
Trustpilot
2 months ago
1 month ago