---
product_id: 6626285
title: "Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 6 Pound (Packaging May Vary)"
brand: "optimum nutrition"
price: "€ 80.67"
currency: EUR
in_stock: true
reviews_count: 12
category: "Optimum Nutrition"
url: https://www.desertcart.ie/products/6626285-optimum-nutrition-serious-mass-weight-gainer-protein-powder-mass-gainer
store_origin: IE
region: Ireland
---

# 250g Carbs, no added sugar 50g Blended Protein 1,250 Calories/serving Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 6 Pound (Packaging May Vary)

**Brand:** optimum nutrition
**Price:** € 80.67
**Availability:** ✅ In Stock

## Summary

> 🚀 Bulk smarter, not harder — Serious Mass for serious results!

## Quick Answers

- **What is this?** Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 6 Pound (Packaging May Vary) by optimum nutrition
- **How much does it cost?** € 80.67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/6626285-optimum-nutrition-serious-mass-weight-gainer-protein-powder-mass-gainer)

## 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

- • **Calorie Powerhouse:** Fuel your gains with a massive 1,250 calories per serving—perfect for fast metabolisms and serious bulkers.
- • **Carb-Loaded Energy:** Over 250 grams of clean carbohydrates to keep your energy high and recovery fast—no added sugars.
- • **Mix & Match Mastery:** Blend with fruits, nuts, or peanut butter for a personalized calorie boost that fits your lifestyle and taste.
- • **Immune Boost Formula:** Enhanced with 25 essential vitamins and minerals including Vitamin C and Zinc to keep you strong inside and out.
- • **Protein-Packed Performance:** 50 grams of premium blended protein to support muscle repair and growth after every workout.

## Overview

Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,250 calories, 50g of blended protein, and 250g of carbohydrates per 2-scoop serving. Fortified with 25 vitamins and minerals including immune-supporting Vitamin C and Zinc, plus creatine and glutamine, it’s designed to maximize muscle growth and recovery. Ideal for fast metabolisms and those struggling to meet calorie goals, it blends smoothly and offers versatile mix-in options for a tailored nutrition boost.

## Description

Product 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. Brand Story By Optimum Nutrition

Review: Highly recommend for anyone looking to bulk up effectively! 💪 - This is my 5th time buying Optimum Nutrition Serious Mass, and it continues to deliver great results. It has really helped me maintain a steady calorie surplus and support my weight gain goals. The taste is consistent, it blends well (especially in a smoothie), and I like that it includes added vitamins like Vitamin C and Zinc. I’ve seen noticeable improvements in my weight and muscle size when using it consistently with workouts.
Review: It helps a lot - Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product.

## Features

- HIGH CALORIE WEIGHT GAINER: More than 1,200 calories per 2-scoop serving
- 50 grams of blended protein per 2-scoop serving
- 250 grams of carbohydrates per 2-scoop serving
- With over 20 vitamins and minerals including Vitamin C and Zinc to provide immune support
- MORE VERSATILITY: Using an electric blender, add fresh or frozen fruits, peanut butter, nuts, and other calorie dense foods to boost your weight gain potential
- 1,250 Calories
- 50 gram of Blended Protein
- Over 250 g of Carbohydrates with no added sugar
- Creatine, Glutamine, and Glutamic Acid
- 25 Vitamins and Essential Minerals

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B00GJXA2RS |
| Best Sellers Rank | #2,431 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #329 in Sales & Deals |
| Customer Reviews | 4.5 4.5 out of 5 stars (42,218) |
| Date First Available  | November 8, 2013 |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 1114117 |
| Manufacturer  | Glanbia Performance Nutrition |
| Product Dimensions  | 8.06 x 8.06 x 10.39 inches; 6 Pounds |

## Product Details

- **Brand:** Optimum Nutrition
- **Flavor:** Chocolate Peanut Butter
- **Item Weight:** 6 Pounds
- **Material Type Free:** Caffeine Free
- **Servings per Container:** 8

## Images

![Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 6 Pound (Packaging May Vary) - Image 1](https://m.media-amazon.com/images/I/71aBrpNU4lL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Highly recommend for anyone looking to bulk up effectively! 💪
*by C***Y on February 12, 2026*

This is my 5th time buying Optimum Nutrition Serious Mass, and it continues to deliver great results. It has really helped me maintain a steady calorie surplus and support my weight gain goals. The taste is consistent, it blends well (especially in a smoothie), and I like that it includes added vitamins like Vitamin C and Zinc. I’ve seen noticeable improvements in my weight and muscle size when using it consistently with workouts.

### ⭐⭐⭐⭐⭐ It helps a lot
*by K***S on December 7, 2025*

Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product.

### ⭐⭐⭐⭐⭐ The best
*by D***H on February 10, 2026*

This protein powder is excellent! It mixes very smoothly with water or milk and doesn’t leave any clumps. The taste is really good, not too sweet, which I appreciate.

## Frequently Bought Together

- Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 6 Pound (Packaging May Vary)
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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-26*