---
product_id: 249864769
title: "Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG)"
brand: "optimum nutrition"
price: "€ 42.47"
currency: EUR
in_stock: false
reviews_count: 13
url: https://www.desertcart.ie/products/249864769-optimum-nutrition-on-serious-mass-high-protein-muscle-building-weight
store_origin: IE
region: Ireland
---

# 250g+ carbs with zero added sugar 50g blended protein for muscle growth 1,250 Calories per serving Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG)

**Brand:** optimum nutrition
**Price:** € 42.47
**Availability:** ❌ Out of Stock

## Summary

> 💥 Bulk up smarter, not harder with Serious Mass!

## Quick Answers

- **What is this?** Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) by optimum nutrition
- **How much does it cost?** € 42.47 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/249864769-optimum-nutrition-on-serious-mass-high-protein-muscle-building-weight)

## Best For

- optimum nutrition enthusiasts

## Why This Product

- Trusted optimum nutrition brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Protein Punch:** 50 grams of premium blended protein to accelerate muscle recovery and growth.
- • **Clean Carb Surge:** Over 250 grams of carbs with no added sugar to keep your energy clean and sustained.
- • **Calorie Powerhouse:** Fuel your gains with a massive 1,250 calories per serving—because size matters.
- • **Recovery Amplifiers:** Includes Creatine, Glutamine, and Glutamic Acid for next-level muscle repair.
- • **Immune Boost Formula:** Packed with Vitamin C, Zinc, and Vitamin D to keep you strong inside and out.

## Overview

Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,250 calories, 50 grams of protein, and over 250 grams of carbohydrates per serving. Enhanced with 25 essential vitamins and minerals plus immune-supporting nutrients like Vitamin C, Zinc, and Vitamin D, it’s designed for serious muscle growth and recovery. Ideal for post-workout or between meals, this 12 lb strawberry-flavored powder helps professionals crush their physique goals with clean, powerful nutrition.

## Description

Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique you’ve always wanted.

Review: this good - this good
Review: هل يزيد بالوزن - Good product fast delivery

## Features

- Adding calories has never been this easy or tasted so good
- 1,250 Calories
- 50 Grams of blended protein
- Over 250 Grams of carbohydrates with no added sugar
- Creatine, Glutamine and Glutamic Acid and 25 Vitamins and essential minerals
- Packaging may vary

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0001FSWMM |
| ASIN  | B0001FSWMM |
| Additives | L-Glutamine |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,457 in Health ( See Top 100 in Health ) #59 in Sports Supplements #2,317 in Vitamins, Minerals & Supplements |
| Brand | Optimum Nutrition |
| Country of origin | us |
| Customer Reviews | 4.2 4.2 out of 5 stars (47,085) |
| Customer reviews | 4.2 4.2 out of 5 stars (47,085) |
| Date First Available | 7 August 2012 |
| Department  | unisex-adult |
| Format | Powder |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 1031917 |
| Manufacturer  | Optimum Nutrition |
| Product Dimensions  | 29.21 x 13.97 x 40.64 cm; 5.44 kg |
| Product Name | HEALTH_PERSONAL_CARE |
| Serving Recommendation | 334 Grams |
| Units | 1 Count |
| Weight | 12.83 Pounds |

## Product Details

- **Brand:** Optimum Nutrition
- **Flavour:** Strawberry
- **Item weight:** 12 Pounds
- **Material type free:** Caffeine Free
- **Servings per container:** 16

## Images

![Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) - Image 1](https://m.media-amazon.com/images/I/814o1QYGHDL.jpg)
![Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) - Image 2](https://m.media-amazon.com/images/I/81XVTq-MwQL.jpg)
![Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) - Image 3](https://m.media-amazon.com/images/I/71-KLkmWRBL.jpg)
![Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) - Image 4](https://m.media-amazon.com/images/I/81hx0zdfITL.jpg)
![Optimum Nutrition (ON) Serious Mass: High Protein Muscle Building & Weight Gainer Protein Powder, 50 Grams of Protein, Vitamin C, Zinc And Vitamin D For Immune Support - Strawberry, 12 Lbs (5.44 KG) - Image 5](https://m.media-amazon.com/images/I/81JJIx-w5mL.jpg)

## Available Options

This product comes in different **Size, Flavor** options.

## Questions & Answers

**Q: Can I need one kg**
A: Dear Valued Customer,

I hope this message finds you well.

We wanted to inform you that Optimum Serious Mass in the 1 kg variant is currently not in production by the company. However, we do have the following options available:

Optimum Nutrition (ON) Serious Mass: Chocolate, 12 Lbs (5.44 KG)
Optimum Nutrition (ON) Serious Mass: Chocolate, 6lb (2.73 KG)

Thank You!

**Q: When the date of expiry?**
A: 1 year ahead is the minimum requirement of all nutritional stuff in Amazone

**Q: Is there a version of this product without creatine?**
A: Hi,
This product contains Creatine. There is no version of this product without creatine.

**Q: What is the expiry date ?**
A: October/2022

## Customer Reviews

### ⭐⭐⭐⭐⭐ this good
*by H***L on 29 December 2025*

this good

### ⭐⭐⭐⭐⭐ هل يزيد بالوزن
*by H***L on 10 December 2025*

Good product fast delivery

### ⭐⭐⭐⭐ Will recommend
*by M***. on 3 December 2025*

It works superbly

## Frequently Bought Together

- Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Strawberry, 12 Pound (Packaging May Vary)
- Optimum Nutrition Micronized Creatine Monohydrate Powder, Unflavored, 120 Servings, 600 Grams (Packaging May Vary)
- VELOMIX -2 Pack- 28 oz Protein Shaker Bottles for Protein Mixes - 2x Wire Whisk | Leak Proof Shaker Cups for Protein Shakes | Protein Shaker Bottle Pack | Shakers for Protein Shakes-Black&Transparent

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-02*