

💥 Bulk up smart, recover faster, and own your transformation!
Optimum Nutrition Serious Mass is a high-calorie weight gainer designed for adults seeking rapid muscle growth and weight gain. Each serving delivers 1,250 calories, 50 grams of blended protein, and over 250 grams of carbohydrates without added sugar, enhanced with 25 essential vitamins and minerals plus creatine and glutamine to support muscle recovery and immune health. Ideal for post-workout or between meals, this chocolate-flavored powder is a top choice for serious fitness enthusiasts.






| ASIN | B06XH28C1K |
| ASIN | B06XH28C1K |
| Age Range Description | Adult |
| Best Sellers Rank | #1,525 in Health ( See Top 100 in Health ) #100 in Sports Supplements |
| Brand | Optimum Nutrition |
| Country of origin | USA |
| Country of origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (46,770) |
| Customer reviews | 4.2 4.2 out of 5 stars (46,770) |
| Date First Available | 7 April 2017 |
| Format | Powder |
| Is Discontinued By Manufacturer | Yes |
| Item model number | ON Serious Mass Chocolate 6lb |
| Manufacturer | Optimum Nutrition |
| Product Dimensions | 8 x 4 x 6 cm; 2.72 kg |
| Product Name | HEALTH_PERSONAL_CARE |
| Serving Recommendation | One Scoop |
| Serving Size | 2 scoops, 2 scoops |
| Units | 2720 Grams |
| Volume | 0.27 Milliliters |
| Weight | 0.27 Kilograms |
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
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。
K**S
Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product.
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