---
product_id: 1047483
title: "Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate 12LB"
brand: "optimum nutrition"
price: "R7304"
currency: ZAR
in_stock: true
category: "Optimum Nutrition"
url: https://www.desertcart.co.za/products/1047483-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-12lb
store_origin: ZA
region: South Africa
---

# 250g+ carbs per serving 50g blended protein 1200+ calories/serving Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate 12LB

**Brand:** optimum nutrition
**Price:** R7304
**Availability:** ✅ In Stock

## Summary

> 🚀 Fuel your transformation with Serious Mass — because average gains are so last season.

## Quick Answers

- **What is this?** Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate 12LB by optimum nutrition
- **How much does it cost?** R7304 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/1047483-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-12lb)

## 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

- • **Max Out Your Gains:** Over 1,200 calories fuel serious muscle growth and weight gain.
- • **Protein Powerhouse:** 50 grams of premium whey blend to support lean muscle development.
- • **Carb-Load Like a Pro:** 250+ grams of carbs to replenish glycogen and boost energy.
- • **Immune Boost Formula:** Packed with 20+ vitamins & minerals including Vitamin C & Zinc for daily defense.
- • **Customizable Calorie Bomb:** Blend with fruits, nuts, or peanut butter for next-level mass gains.

## Overview

Optimum Nutrition Serious Mass Chocolate 12LB is a high-calorie weight gainer delivering over 1,200 calories, 50g of whey protein, and 250g+ carbohydrates per 2-scoop serving. Enhanced with 20+ vitamins and minerals for immune support, it’s designed for adults seeking serious muscle growth and weight gain. Versatile for blending with calorie-dense add-ins, it’s the go-to formula for post-workout recovery and maximizing daily caloric intake.

## Description

More calories. More protein. More carbs. SERIOUS MASS by Optimum Nutrition serves over 1,200 calories, 50g of blended protein, and over 249g of carbohydrates per 2-scoop serving to help you maximize your daily caloric intake – the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with more tools to help you pack on pounds, when taken in addition to normal calorie intake and over time with regular resistance training.

## Features

- HIGH-CALORIE MASS GAINER FOR SIZE & STRENGTH:Delivers over 1,200 calories per 2-scoop serving to support weight gain, bulking phases, and increased daily energy intake when diet alone isn’t enough
- 50G PREMIUM PROTEIN BLEND: Provides 50 grams of blended protein per serving to help support muscle repair, recovery, and lean mass development after intense training
- HIGH-CARB ENERGY SUPPORT: Packed with over 250 grams of carbohydrates per serving to replenish glycogen stores, fuel workouts, and support sustained energy throughout the day
- ADDED VITAMINS & MINERALS FOR DAILY NUTRITION: Includes 20+ essential vitamins and minerals, including Vitamin C and Zinc, to help support overall nutritional balance and immune system function
- CUSTOMIZABLE, HIGH-CALORIE SHAKE BUILDER: Easily blend with milk, fruits, peanut butter, nuts, or other calorie-dense ingredients to further increase calories, improve taste, and tailor your weight-gain goals
- Optimum Nutrition is the World's #1 Sports Nutrition Brand- Highest quality control measures so you feel comfortable and safe consuming the product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000GIPJ0M |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #1,893 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #304 in Sales & Deals |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.5 out of 5 stars 34,946 Reviews |
| Diet Type | Vegetarian |
| Flavor | Chocolate |
| Global Trade Identification Number | 00748927023800 |
| Item Dimensions | 11.5 x 5.5 x 16 inches |
| Item Highlight | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing |
| Item Weight | 12 pounds |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1101529 |
| Material Type Free | Caffeine Free |
| Model Name | ON SERIOUS MASS CHOCOLATE 12LB |
| Model Number | 1101529 |
| Net Content Volume | 13.88 liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Protein | 50 g |
| Protein Source | Whey |
| Recommended Uses For Product | Calorie Increase, Muscle Growth, Post-Workout, Weight Gain |
| Servings per Container | 16 |
| Supplement Formulation | Multi-Supplement |
| Total Servings Per Container | 16 |
| UPC | 748927023800 748927063592 |
| Unit Count | 192 Ounce |
| Vitamins And Minerals | 0.9, 3.7, 30, 5, 700 milligrams, 100, 100, 1560, 410, 44, 59, 80 percent_daily_value_fda |

## Product Details

- **Brand:** Optimum Nutrition
- **Flavor:** Chocolate
- **Item Weight:** 12 pounds
- **Material Type Free:** Caffeine Free
- **Servings per Container:** 16

## Images

![Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate 12LB - Image 1](https://m.media-amazon.com/images/I/71s646Zb9pL.jpg)

## Available Options

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

## Frequently Bought Together

- Optimum Nutrition Serious Mass, Weight Gainer Protein Powder with Creatine
- Nutricost Creatine Monohydrate Micronized Powder 500G, 5000mg Per Serv (5g) - 100 Servings, 17.9 Oz
- 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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**Shop now:** [https://www.desertcart.co.za/products/1047483-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-12lb](https://www.desertcart.co.za/products/1047483-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-12lb)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-11-01*