










🚀 Bulk up smarter, not harder with Serious Mass!
Optimum Nutrition Serious Mass is a scientifically formulated weight gainer delivering 1,250 calories, 50 grams of blended protein, and over 250 grams of carbs per serving. Enhanced with 25 essential vitamins and minerals plus immune-supporting nutrients, it’s designed for serious muscle builders aiming to maximize size and recovery without added sugars.






| ASIN | B0015R18SU |
| ASIN | B0015R18SU |
| Age Range Description | Adult |
| Allergen Information | Eggs, Hazelnuts, Milk, Peanuts |
| Best Sellers Rank | #2,418 in Health ( See Top 100 in Health ) #124 in Sports Supplements |
| Brand | Optimum Nutrition |
| Country of origin | USA |
| Country of origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (47,307) |
| Customer reviews | 4.2 4.2 out of 5 stars (47,307) |
| 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
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.
M**.
Will recommend
It works superbly
K**F
Highly recommended
Awesome product
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
A**N
Loved it
Buy it
A**B
expensive
very expensive as it has only 08 serving.
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
D**R
With weight training and a very physical job I need a ton of calories (around 4000 a day) this mass gainer definitely helps, I find it tastes better with semi skimmed milk than water, and totals more calories consumed with 2 servings. The scoop is quite bigger, larger than what you'd used you put detergent in your washing machine, and the dose is 2 a day, you could just have one after a workout, but I have one at work around 10-11am which helps feel a gap well and being a shame is easier than food or snacks. I got the vanilla one, it tastes a tad different to the normal whey protein by ON, sweeter maybe but after a first few tries it's fairly nice, I don't use a blender just a shaker ball, and about 600ml of milk, it does a clump a bit and needs several shakes between a few swigs. Put the milk or water in first (this is common knowledge) but try and shake it hard/drink quick after dropping the powder in as the longer it fits the more it'll clump at the bottom and it's not fun trying to consume the gloop at the bottom, messy. Or just don't be lazy like my and blend it, might come out better.
A**D
اعجبني فيه ان نتائجه مباشرة وما اعجبني انه مليان سكر وكرياتين
N**H
Good
J**R
Es perfecto para entrenar y efectifidad/calidad/precio. He visto reseñas de personas que lo critican por argumentar que la cantidad de proteina por dosis es inferior a otros productos. No es cierto. Llevo un año usándolo. Es ideal para personas que les cueste comer por que con poco estamos satisfechos. La suplementación vitamínica que incluye también es fabulosa, el gusto en cualquiera de su variedad es exquisita, fina, fina, no empalaga, se deshace perfecto. Recomendable 100% para entrenamiento de fuerza e hipertrofia.
K**Y
Wysoka jakość. Bardzo polecam
Trustpilot
2 months ago
2 weeks ago