---
product_id: 690933551
title: "(ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for Vegetarians"
brand: "optimum nutrition"
price: "KSh19655"
currency: KES
in_stock: true
reviews_count: 5
url: https://www.desertcart.co.ke/products/690933551-on-serious-mass-high-protein-high-calorie-weight-gainer-powder
store_origin: KE
region: Kenya
---

# 250g+ Carbs for energy boost 50g Protein for muscle recovery 1200+ Calories per serving (ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for Vegetarians

**Brand:** optimum nutrition
**Price:** KSh19655
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** (ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for Vegetarians by optimum nutrition
- **How much does it cost?** KSh19655 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/690933551-on-serious-mass-high-protein-high-calorie-weight-gainer-powder)

## 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

- • **Vegetarian & Pure:** Now suitable for vegetarians with triple-sealed purity to ensure freshness and quality in every scoop.
- • **Carb-Loaded Energy:** Over 250 grams of carbohydrates to keep your energy levels maxed and muscles fueled all day.
- • **Massive Calorie Surge:** Fuel your gains with 1200+ calories per 2-scoop serving—perfect for those hard-to-pack-on pounds.
- • **Protein-Powered Recovery:** 50 grams of high-quality protein to accelerate muscle repair and growth post-workout.
- • **Complete Nutrient Support:** Packed with 24 essential vitamins & minerals plus creatine and glutamine for holistic muscle and health support.

## Overview

Optimum Nutrition Serious Mass is a high-calorie, high-protein weight gainer powder designed for adults with fast metabolisms who struggle to gain weight. Each 2-scoop serving delivers 1200+ calories, 50 grams of protein, and over 250 grams of carbohydrates, enriched with 24 vitamins, minerals, creatine, and glutamine. Suitable for vegetarians and sealed for purity, it’s ideal for post-workout recovery and between-meal nutrition to support serious muscle and mass gains.

## Description

Now Suitable for Vegetarians, SERIOUS MASS is the ultimate weight gain and muscle building formula. With 1200 calories per 2-scoop serving and 50 grams of protein to support muscle recovery, this 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 support your weight gains goals.

Review: Packaging is not good as compared to my last order. Product verified and it is genuine but the product taste changes It doesn't taste good as before
Review: Good

## Features

- What is Serious Mass: Suitable for Vegetarians, Optimum Nutrition Serious Mass is a calorie weight gainer which is also high in protein and when taken over time with regular resistance exercise and a balanced diet can help you gain mass and muscle
- Who Needs Serious Mass: People with very active metabolism that struggle to gain weight
- What's in Serious Mass: 1200+ Calories, 50 Grams of Protein and over 250 Grams of Carbohydrates per Serving with 24 Vitamins & Minerals, Creatine & Glutamine
- When to Consume: Use post-workout and/or between meals to add calories, carbs and protein to your healthy, balanced diet
- Purity - The neck of the tub is sealed with an induction vented liner inside the cap. The product has a plastic shrink wrap seal around the cap (outside) for protection

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09QXTRNW6 |
| ASIN  | B09QXTRNW6 |
| Additives | L-Glutamine |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #54,450 in Health ( See Top 100 in Health ) #153 in Weight Loss Supplements |
| Brand | Optimum Nutrition |
| Customer Reviews | 3.9 3.9 out of 5 stars (1,320) |
| Customer reviews | 3.9 3.9 out of 5 stars (1,320) |
| Date First Available | 21 October 2023 |
| Format | Powder |
| Item model number  | 1115238 |
| Manufacturer  | Manufactured for OPTIMUM NUTRITION, INC. By Tirupati Wellness Pvt. Ltd. |
| Product Dimensions  | 25 x 15 x 15 cm; 750 g |
| Serving Recommendation | 2 Scoops |
| Units | 1000.0 Grams |

## Product Details

- **Brand:** Optimum Nutrition
- **Diet type:** Vegetarian
- **Flavour:** Chocolate
- **Item dimensions L x W x H:** 25 x 15 x 15 centimeters
- **Item form:** Powder
- **Item weight:** 750 Grams
- **Primary supplement type:** vitamins
- **Product benefits:** Muscle Growth
- **Special ingredients:** L-Glutamine
- **Unit count:** 1000.0 Grams

## Images

![(ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for Vegetarians - Image 1](https://m.media-amazon.com/images/I/71uXZbooOeL.jpg)

## Customer Reviews

### ⭐⭐⭐ Review
*by L***R on 3 February 2026*

Packaging is not good as compared to my last order. Product verified and it is genuine but the product taste changes It doesn't taste good as before

### ⭐⭐⭐⭐⭐ Review
*by K***A on 28 February 2026*

Good

### ⭐⭐⭐⭐⭐ Review
*by A***A on 26 January 2026*

Good

## Frequently Bought Together

- Optimum Nutrition (ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for Vegetarians
- Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, 3g of 100% Creatine Monohydrate per serve, Supports Athletic Performance & Power, Unflavored.
- OPTIMUM NUTRITION (ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 3 kg (Chocolate) with Vitamins and Minerals, Vegetarian

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**Shop now:** [https://www.desertcart.co.ke/products/690933551-on-serious-mass-high-protein-high-calorie-weight-gainer-powder](https://www.desertcart.co.ke/products/690933551-on-serious-mass-high-protein-high-calorie-weight-gainer-powder)

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-16*