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💥 Bulk up smarter, not harder — Serious Mass means serious results!
Optimum Nutrition Serious Mass is a high-calorie, high-protein weight gainer designed for adults aiming to build muscle and increase body mass efficiently. Each serving delivers 1,250 calories, 50 grams of blended protein, and over 250 grams of carbohydrates without added sugar, complemented by creatine, glutamine, and 25 essential vitamins and minerals including immune-supporting Vitamin C, D, and Zinc. Ideal as a post-workout or between-meal shake, it supports muscle recovery, growth, and overall immune health.






| ASIN | B0015R18SU |
| ASIN | B0015R18SU |
| Age Range Description | Adult |
| Allergen Information | Eggs, Hazelnuts, Milk, Peanuts |
| Best Sellers Rank | #8,060 in Health ( See Top 100 in Health ) #421 in Sports Supplements |
| Brand Name | Optimum Nutrition |
| Country of Publication | USA |
| Country of origin | USA |
| Customer Reviews | 4.4 4.4 out of 5 stars (4,188) |
| Customer reviews | 4.4 4.4 out of 5 stars (4,188) |
| Diet Type | Vegetarian |
| Flavor | Banana |
| Global Trade Identification Number | 00748927028867 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions | 39 x 29 x 14 centimeters |
| Item Nype Name | HEALTH_PERSONAL_CARE |
| Item Weight | 2.72 Kilograms |
| Item model number | 1031913 |
| Manufacturer | Optimum Nutrition |
| Manufacturer | Optimum Nutrition |
| Manufacturer Part Number | 1031913 |
| Material Type Free | Caffeine Free |
| Model Name | Optimum Nutrition Serious |
| Model Number | 1031913 |
| Net Content Volume | 11.91 Liters |
| Number of Items | 1 |
| Package Type Name | Bottle |
| Product Benefits | Muscle Growth |
| Product Dimensions | 39 x 29 x 14 cm; 2.72 kg |
| Recommended Uses For Product | Immune Support |
| Total Servings Per Container | 8 |
| Unit Count | 2720 Grams |
G**G
2nd time buyer!
Effective!!! Try it now!
Z**I
Genuine
Its a genuine product.
M**.
Will recommend
It works superbly
A**D
ليس كما اعتقد
M**N
Best
Good taste genuine products
R**R
Taste is so bad, its unbearable!
Literally, everything about the product is great, the quality, the brand, the packaging and the delivery. But.. when it comes to the taste; it's a whole different story, imagine someone puked and made it into powder for you to taste, A big NO from me.
W**M
Near to expiry product
Product is near to expiry, pls be cautious.
N**R
I recommend it for all
Some how not power full than vanilla flavor. But its fine and working.
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.
B**A
Il prodotto è buono
D**O
Llevo tomándolo desde febrero y se ven los resultados,igual se notarían más, pero como no tengo una dieta estricta. Pero atléticamente me veo muy bien
K**2
Also ich habe immer nur eine halbe Portion getrunken sozusagen. Zwei scoops waren für mich und meine Zwecke viel zu viel gleich am Morgen 😅 Aber sonst nichts auszusetzen, schmeckt und tut was es soll
A**L
I used chocolate flavored before and wanted to change the taste. It’s really good.
Trustpilot
1 month ago
5 days ago