---
product_id: 556218496
title: "OPTIMUM NUTRITION (ON) Serious Mass Gainer powder (Veg) - Pack of 1 kg (Chocolate) & Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, Unflavored. COMBO"
brand: "optimum nutrition"
price: "¥8885"
currency: JPY
in_stock: true
reviews_count: 8
category: "Optimum Nutrition"
url: https://www.desertcart.jp/products/556218496-optimum-nutrition-on-serious-mass-gainer-powder-veg-pack-1
store_origin: JP
region: Japan
---

# 3g Creatine Monohydrate/serving 50g Protein/serving 1200+ Calories/serving OPTIMUM NUTRITION (ON) Serious Mass Gainer powder (Veg) - Pack of 1 kg (Chocolate) & Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, Unflavored. COMBO

**Brand:** optimum nutrition
**Price:** ¥8885
**Availability:** ✅ In Stock

## Summary

> 🏋️‍♂️ Bulk Up Smart, Perform Harder!

## Quick Answers

- **What is this?** OPTIMUM NUTRITION (ON) Serious Mass Gainer powder (Veg) - Pack of 1 kg (Chocolate) & Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, Unflavored. COMBO by optimum nutrition
- **How much does it cost?** ¥8885 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/556218496-optimum-nutrition-on-serious-mass-gainer-powder-veg-pack-1)

## 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

- • **Trusted & Certified:** Informed Choice certified and trusted by elite athletes for 35+ years—quality you can count on.
- • **Massive Calorie Boost:** Fuel your gains with 1200+ calories per serving—perfect for fast metabolisms craving serious bulk.
- • **Clean, Micronized Creatine:** 3 grams of pure creatine monohydrate per serving, micronized for seamless mixing and peak performance.
- • **Vitamins & Minerals Complex:** 24 essential vitamins and minerals to support overall health while you build serious mass.
- • **Protein-Powered Muscle Recovery:** 50 grams of high-quality protein to accelerate muscle repair and growth post-workout.

## Overview

This combo pack features Optimum Nutrition Serious Mass, a vegetarian-friendly high-calorie weight gainer delivering 1200+ calories, 50g protein, and 250g carbs per serving, enriched with 24 vitamins and minerals to support muscle growth and recovery. Paired with ON Micronized Creatine Powder providing 3g of pure creatine monohydrate per serving, it enhances ATP recycling for improved athletic power and performance. Both products are rigorously tested and trusted by athletes worldwide.

## Description

Optimum Nutrition (ON) Serious Mass High Protein High Calorie Weight Gainer Powder - 1 kg (Chocolate) with Vitamins and Minerals, Suitable for VegetariansNow 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.Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, 3g of 100% Creatine Monohydrate per serve, Supports Athletic Performance & Power, Unflavored.Creatine is naturally produced in our body and it is used in the recycling of ATP which is our body’s energy currency. Creatine monohydrate is one of the most well-researched sports nutrition ingredients. When used in combination with regular weight training, it has been shown to support athletic performance and power.

Review: Who said it’s fake and bad product? - Some in the review says that it was a fake product or it contained worms, however it’s totally not true. So I got the parcel today within the expected delivery date and checked the authentication. It found that it was 100% authentic product and the quality of the powder is very good. So, it’s up to you which reviews you want to trust, however don’t just blindly believe whatever you see. Because I was the one who was disappointed with buying this from this seller after seeing the low stared reviews, but the product I got was true one and the quality is good tho.
Review: Dr Arjun - its a good product but inside scoop missing i want that scoop

## Features

- Product 1: 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
- Product 1: 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
- Product 1: When to Consume: Use post-workout and/or between meals to add calories, carbs and protein to your healthy, balanced diet
- Product 1: 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
- Product 2: What Does it Have - 3 Grams of 100% Creatine Monohydrate per Serving. 100g Powder (33 Servings).
- Product 2: Zero Calories & Zero Carbohydrates. Unflavored can be mixed with your favorite beverage with ease. Micronized for easy mixing.
- Product 2: What Does it Do - Helps Support ATP Recycling, Supports Athletic Performance & Power.
- Product 2: Banned Substance Tested - Informed Choice certified - Standard control measures so you feel comfortable and safe consuming the product. Optimum Nutrition is trusted by the best athletes all over the world for past 35 years.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CHLYN8BJ |
| ASIN  | B0CHLYN8BJ |
| Best Sellers Rank | #1,162 in Health & Personal Care ( See Top 100 in Health & Personal Care ) #2 in Mass & Weight Gainers |
| Customer Reviews | 3.9 3.9 out of 5 stars (3,135) |
| Date First Available  | 8 September 2023 |
| Item Weight | 1 kg |
| Item Weight  | 1 kg |

## Product Details

- **Brand:** Optimum Nutrition
- **Diet Type:** Vegetarian
- **Dosage Form:** Powder
- **Flavour:** Chocolate 1 Kg + Creatine 100 g
- **Item Form:** Powder
- **Item Weight:** 1 Kilograms
- **Number of Items:** 2
- **Package Information:** Tub
- **Primary Supplement Type:** Creatine
- **Product Benefits:** Vegan Friendly

## Images

![OPTIMUM NUTRITION (ON) Serious Mass Gainer powder (Veg) - Pack of 1 kg (Chocolate) & Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, Unflavored. COMBO - Image 1](https://m.media-amazon.com/images/I/61mV5rUx6mL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Who said it’s fake and bad product?
*by S***H on 4 November 2024*

Some in the review says that it was a fake product or it contained worms, however it’s totally not true. So I got the parcel today within the expected delivery date and checked the authentication. It found that it was 100% authentic product and the quality of the powder is very good. So, it’s up to you which reviews you want to trust, however don’t just blindly believe whatever you see. Because I was the one who was disappointed with buying this from this seller after seeing the low stared reviews, but the product I got was true one and the quality is good tho.

### ⭐⭐⭐⭐ Dr Arjun
*by P***N on 2 December 2025*

its a good product but inside scoop missing i want that scoop

### ⭐⭐⭐⭐⭐ Effective Mass Gainer With Noticeable Results and No Side Effects
*by B***R on 24 December 2025*

I purchased the 3 kg pack of Optimum Nutrition Mass Gainer and finished the entire pack before writing this review. Over the course of using it, I gained around 2.5 kg in weight, which is a good and steady result. The product mixed well, was easy to consume, and I did not experience any side effects during or after use. Results may vary depending on diet and workout routine, but in my case it worked effectively as a support supplement for weight gain.

## Frequently Bought Together

- OPTIMUM NUTRITION (ON) Serious Mass Gainer powder (Veg) - Pack of 1 kg (Chocolate) & Optimum Nutrition (ON) Micronized Creatine Powder - 100 Gram, 33 Serves, Unflavored. COMBO
- Optimum Nutrition (ON) Multivitamin for MEN– 60 Tablets, 26 Vitamins & Minerals, Amino Acids & Anti-Oxidants (Green Tea Extract, Beta Carotene, Lutein, Lycopene). Vegetarian.
- Optimum Nutrition BCAA, 5g BCAAs in 2:1:1 Ratio, 30 servings, For Muscle Recovery & Endurance, Intra workout, Informed Choice certified (250gm, Green Apple)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-30*