---
product_id: 262624290
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: "¥21932"
currency: JPY
in_stock: true
reviews_count: 5
category: "Optimum Nutrition"
url: https://www.desertcart.jp/products/262624290-optimum-nutrition-serious-mass-weight-gainer-protein-powder-mass-gainer
store_origin: JP
region: Japan
---

# 250g Carbs for Maximum Gains 50g Blended Protein Power 1,250 Calories per 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:** ¥21932
**Availability:** ✅ In Stock

## Summary

> 🚀 Bulk Up Boldly with Serious Mass – Because Gains Wait for No One!

## 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?** ¥21932 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/262624290-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

- • **Carb-Loading Champion:** Over 250 grams of clean carbohydrates to supercharge your energy and recovery without added sugars.
- • **Customizable Mass Builder:** Mix with fruits, nuts, or peanut butter for a personalized, calorie-dense shake that fits your lifestyle.
- • **Protein-Packed Powerhouse:** 50 grams of premium blended protein to support lean muscle repair and growth after every workout.
- • **Immune Boost with Every Scoop:** Infused with Vitamin C and Zinc to keep your defenses strong while you bulk up.
- • **Calorie Overload for Serious Gains:** Fuel your muscle growth with a massive 1,250-calorie punch per serving—because average just won’t cut it.

## 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. Enhanced with 25 essential vitamins and minerals including immune-supporting Vitamin C and Zinc, plus creatine and glutamine, it’s designed for adults aiming to maximize muscle growth and recovery. Perfect for post-workout or between meals, this versatile powder lets you customize your shake with calorie-dense add-ins to accelerate your mass-building journey.

## 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.

Review: Ottimi effetti e gusto davvero piacevole. Richiede un po’ più tempo per sciogliersi in acqua, ma le porzioni sono abbondanti e soddisfacenti.
Review: Like the flavour.

## 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 |
| ASIN  | B00GJXA2RS |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #12,118 in Health ( See Top 100 in Health ) #179 in Nutrition Bars & Drinks |
| Brand | Optimum Nutrition |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,576) |
| Customer reviews | 4.5 4.5 out of 5 stars (5,576) |
| Date First Available | 12 March 2014 |
| Format | Powder |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 1114117 |
| Manufacturer  | Glanbia Performance Nutrition |
| Product Dimensions  | 20.48 x 20.48 x 26.4 cm; 2.72 kg |
| Units | 2720 Grams |
| Weight | 7 Pounds |

## Product Details

- **Brand:** Optimum Nutrition
- **Flavour:** 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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***N on 12 October 2025*

Ottimi effetti e gusto davvero piacevole. Richiede un po’ più tempo per sciogliersi in acqua, ma le porzioni sono abbondanti e soddisfacenti.

### ⭐⭐⭐⭐⭐ Review
*by J***T on 10 April 2021*

Like the flavour.

### ⭐⭐⭐⭐⭐ Review
*by K***K on 14 December 2025*

Serious Mass really lives up to its name. If you’re looking to put on size, this is one of the easiest ways to get a huge calorie and protein boost in one shake.. The taste is solid (I’ve tried Chocolate and Vanilla), though it’s definitely thick — I usually blend mine with milk or add a banana/peanut butter to make it smoother. It’s filling, so I don’t use it every day, but on heavy training days it’s perfect. The bag is big and lasts a while, though it can be a bit pricey. Overall, a great option if you’re serious about bulking and need extra calories.

## 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 Japan*
*Store origin: JP*
*Last updated: 2026-03-12*