---
product_id: 3624967
title: "Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary)"
brand: "optimum nutrition"
price: "¥38021"
currency: JPY
in_stock: true
reviews_count: 13
category: "Optimum Nutrition"
url: https://www.desertcart.jp/products/3624967-serious-mass-weight-gainer-protein-powder-vitamin-c-and-zinc
store_origin: JP
region: Japan
---

# 250g+ Carbs/serving 50g Protein/serving 1,260 Calories/serving Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary)

**Brand:** optimum nutrition
**Price:** ¥38021
**Availability:** ✅ In Stock

## Summary

> 🚀 Bulk Up Like a Boss — Serious Gains, Serious Mass!

## Quick Answers

- **What is this?** Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary) by optimum nutrition
- **How much does it cost?** ¥38021 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/3624967-serious-mass-weight-gainer-protein-powder-vitamin-c-and-zinc)

## 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 1,260 calories per serving—because average just won’t cut it.
- • **Customizable Nutrition:** Mix with fresh fruits, nuts, or peanut butter for a personalized calorie and flavor explosion.
- • **Immune Support Formula:** Enhanced with Vitamin C and Zinc to keep you strong inside and out while you bulk.
- • **Carb Overload for Energy:** Over 250 grams of carbohydrates to keep your energy high and your progress unstoppable.
- • **Muscle-Building Protein Boost:** 50 grams of premium blended protein to support serious muscle growth and recovery.

## Overview

Serious Mass Weight Gainer by Optimum Nutrition delivers a potent 1,260 calories, 50g of protein, and over 250g of carbs per serving, enhanced with 25 vitamins and minerals plus creatine and glutamine. Designed for professionals committed to maximizing muscle growth and recovery, it also supports immune health with Vitamin C and Zinc. Perfect for post-workout or between meals, this 12-pound vanilla powder lets you customize your shake for unstoppable weight gain.

## Description

More calories. More protein. More carbs. SERIOUS MASS by Optimum Nutrition serves up 1,260 calories, 50g of blended protein, and over 250g of carbohydrates per 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. Calories per gram: Fat 9, Carbohydrate 4, Protein 4.

Review: Gainer - The price is right. Taste is pleasant. Sort of thick with the recommended amount of water. 1 serving has me feeling completely full and I can eat a lot. I found I had to use a mixer for a smooth consistency, I wasn’t able to get it to mix well in the shaker bottle.
Review: Good product - Very tasty and rich lovely protein powder

## Features

- Packaging may vary - New look, with the same trusted Quality!
- Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product delivery
- High Calorie Weight Gainer: 1,250 Calories per 2-Scoop Serving
- 50 Grams of Protein per Serving
- Over 250 Grams of Carbohydrates per Serving
- 25 Vitamins & Minerals Plus Creatine & Glutamine
- Using an Electric Blender to Add Fresh or Frozen Fruits, Peanut Butter, Nuts & Other Calorie Dense Foods to Boost Your Weight Gain Potential

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B000GIPJ02 |
| Best Sellers Rank | #14,718 in Health & Household ( See Top 100 in Health & Household ) #13 in Sports Nutrition Weight Gainers #1,417 in Sales & Deals |
| Customer Reviews | 4.5 4.5 out of 5 stars (6,822) |
| Date First Available  | May 27, 2004 |
| Department  | GNC|ALL|ALL|NUTRITIONAL SUPPLEMENTS |
| Is Discontinued By Manufacturer  | Yes |
| Item model number  | 1031920 |
| Manufacturer  | Glanbia Performance Nutrition |
| Product Dimensions  | 11.5 x 5.5 x 16 inches; 12 Pounds |

## Product Details

- **Brand:** Optimum Nutrition
- **Flavor:** Vanilla
- **Item Weight:** 192 Ounces
- **Material Type Free:** Caffeine Free
- **Servings per Container:** 16.0

## Images

![Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary) - Image 1](https://m.media-amazon.com/images/I/510JUtwvEyL.jpg)

## Questions & Answers

**Q: How well does this work? I'm a teen with a high matabalizum and I'm looking to build mass and bulk up**
A: I’m nearly 50 years old, but seeing this question I had to comment.  Until I was around 32 or so, I couldn’t gain weight no matter how much I had to eat; or so it seemed.

I remember not caring whether it was fat or ideally muscle, I just didn’t want to be skinny anymore.

Then I hit a point in my life where the metabolism slowed and I couldn’t keep the weight off.  That lasted for nearly 15 years and for some reason my appetite suddenly plummeted and now I’m back looking at weight gainers simply to do nothing more than maintain a healthy weight.

Just try to keep in mind that human physiology typically prohibits putting on large amounts of muscle in a short period of time naturally.  That means that a large portion of quick gains will be fat.  Embrace your high metabolism and shoot for a reasonable goal.

That said, the more calories you intake in a day that exceeds what your body can burn, the quicker you will gain weight.  For the most part, it’s simple math.  Total Intake - Total Burned = Energy Stored Primarily as Fat.  There are about 3500 calories in one pound.  If you were to forge an extra 3500 calories a day, you could theoretically gain 7 pounds a week.  For someone like you, that probably means eating 8,000 calories a day.

Now as far as this product goes, it’s one of the highest calorie per serving gainers I have seen and it’s much quicker to pound a shake than to eat a steak!

Another thing to keep in mind is that supplements that are fortified with vitamins and minerals, have the potential to far exceed recommended safe values for human consumption.  I ran into this when I was your age.  I was drinking over a gallon of milk a day, milk is fortified with vitamin D and that build up led to some freaky painful headaches in me personally.

Too much calcium can also upset your bodies homeostasis and lead to surprising problems.

Being young, your body can handle a lot!  Just wanted you to be aware of the things I wish I knew when I was your age.

If I were young again I would focus on speed, agility and good clean ripped muscle!  Shredded muscle always looks bigger than fat muscle.

Cheers!

**Q: banana**
A: I’m adding my two cents.

Chocolate peanut butter is the truth. Banana was good at first, and then it wasn’t.

**Q: Does it work without work out ?because im so busy all day**
A: First off, I am so sorry that everyone that responded to this question this far hasn't answered your question. I'm seeing you ask if this helps you put on weight without working out. I've seen 3 or 4 people put "no excuses, no short cuts," "no motivation, no nothing" and other meat head answers. I apologize about them =)

Getting to your question. Yes, it does help you gain weight even if you're not working out. I understand you're busy...who's not? Working out and drinking this is without question the best way to gain weight. But, for the last 2 weeks I've been drinking a scoop in the morning, and a scoop at night before bed. And I've gained 3 pounds! Doesn't sound like a lot, but if I don't get 6 eggs every morning, I'll loose 2 pounds. If I don't eat 400 calories everyday, I'll loose 2 pounds. I have such a low fat to muscle ratio that if I type it in, people won't believe me, so ill save it for the haters on YouTube (jk) 😅 

But yeah, this stuff works. Might jist be a pounds a week, but if you're like me, that's great success. This does work without working out as long as you drink it consistently. Best of luck to you my friend.

**Q: will a high intensity sport like basketball plus weight training, 5 days a week  lessen the effectiveness of this product??**
A: The guy who says this causes cancer is lying or is just ignirant. Some other supplements may but even at that mant studies don't say which ones. Powder prorein supplements do not. As do many men, i don't use this product for muscle gain. I use max muscle for that. I use this for belly fat gaining.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Gainer
*by M***X on December 23, 2025*

The price is right. Taste is pleasant. Sort of thick with the recommended amount of water. 1 serving has me feeling completely full and I can eat a lot. I found I had to use a mixer for a smooth consistency, I wasn’t able to get it to mix well in the shaker bottle.

### ⭐⭐⭐⭐⭐ Good product
*by N***E on December 19, 2025*

Very tasty and rich lovely protein powder

### ⭐⭐⭐⭐⭐ Best Protein Powder
*by P***. on August 5, 2025*

excellebt quality protein powder. I been purchasing this powder for the last so many years and it is same great quality. Good amount of protein and it helps build good lean muscle. it is easy to mix, easy to digest, great tasting, good amount of calories. Prices are a bit high but well worth it

## 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
- VOLTRX Premium Electric Protein Shaker Bottle, Made with Tritan - BPA Free - 24 oz Vortex Portable Mixer Cup/USB Rechargeable Shaker Cups for Protein Shakes

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-29*