---
product_id: 52527146
title: "Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary"
brand: "optimum nutrition"
price: "A$291"
currency: AUD
in_stock: true
reviews_count: 11
category: "Optimum Nutrition"
url: https://www.desertcart.com.au/products/52527146-serious-mass-protein-powder-high-calorie-mass-gainer-with-vitamins
store_origin: AU
region: Australia
---

# 3g Creatine for power 50g Protein muscle fuel 1250+ CAL per serving Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary

**Brand:** optimum nutrition
**Price:** A$291
**Availability:** ✅ In Stock

## Summary

> 🚀 Bulk up smarter, not harder with Serious Mass — your ultimate muscle-building sidekick!

## Quick Answers

- **What is this?** Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary by optimum nutrition
- **How much does it cost?** A$291 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/52527146-serious-mass-protein-powder-high-calorie-mass-gainer-with-vitamins)

## 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

- • **Performance Boost:** 3 grams of creatine monohydrate to elevate your workout intensity and recovery.
- • **Calorie Powerhouse:** Fuel your gains with 1250+ calories per serving—because average just won’t cut it.
- • **Muscle Growth Maximizer:** 50 grams of premium protein to sculpt and support serious muscle development.
- • **Vitamin & Mineral Complex:** 25 essential vitamins and minerals to keep your body optimized and energized.
- • **Flavor Variety & Flexibility:** Six crave-worthy flavors plus mix-ins like nut butters for a personalized, delicious shake.

## Overview

Optimum Nutrition Serious Mass is a high-calorie mass gainer protein powder delivering over 1250 calories, 50g of protein, and 3g of creatine per serving. Enriched with 25 essential vitamins and minerals and low in fat, it supports muscle growth, recovery, and performance. Available in six flavors, it’s designed for athletes and fitness enthusiasts aiming for serious size gains with convenient, nutrient-dense shakes.

## Description

Product Description Optimum Nutrition has been helping performance-focused athletes for over 35 years achieve their goals. This time, we bring you the intense and dialled-up version of our muscle-building and weight gain formula. Meet the Serious Mass high-calorie protein powder, designed for true sports enthusiasts and high-performance athletes. Serious Mass is the ultimate muscle-building and mass gainer formula. This protein powder makes the ideal post-workout and between meals shake for sizing up your goals. Every serving of this mass gainer contains 25 essential vitamins and minerals (including vitamin D, B12, E, Biotin and Magnesium), over 1,250 calories to boost your calorie intake, 50 grams of protein to support muscle growth* and 250 grams of carbohydrates helping support muscle recovery**. Plus, every serving has also been enriched with 3 grams of creatine monohydrate that increases your physical performance during high-intensity exercise***. Designed for the goal-focused athlete, our ON Serious Mass High Calorie Weight Gainer protein powder comes in 6 great tasting flavours: banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla. Blend this quality protein with fruit or nut butter for extra calories and discover your optimum taste combination. Serious Mass is quick, convenient, and easy to prepare: simply mix 2 heaped scoops with 710 ml of water or plant milk. Use it after intense training as a part of your recovery routine, between meals, and before bed to add calories, carbs, and protein to your healthy, balanced diet. * Source: EFSA Journal 2010;8(10):1811; 2011;9(6):2203 ** Source: EFSA Journal 2011;9(6):2211 ***Source: EFSA Journal 2011;9(7):2303 Ingredients Corn Maltodextrin Whey Protein Milk (Emulsitier: Lecithin [Soyiy e nced Cocoa Powder, Crecide, Selenum Flayuring, MILK Minerals Complex, Minerals (Magnesium, Iron, Zinc, Manganese, Chromium), Vitamins (C. E. B3, A, B5, B7. B12, B9, D, B6, B1, K, B2), Salt Stabilisers (Cellulose Gum, Guar Gum Carrageenan). Sweetenor (succalose) P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Directions Add 2 heaped scoops (330 g) of Serious Mass to a blender filled with 710 ml (24 oz) of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients (see "Supercharge Your Serious Mass" on the opposite panel) and blend for an additional 30-45 seconds. TIP: New users may find it beneficial to begin with 1/2 a serving daily for the first week and then gradually increase to 1 or more full servings several times a day. Safety Warning Do not exceed the recommended daily dose. Dietary supplements are not a substitute for a balanced and varied diet. Food supplements should be kept out of the reach of children. Manufacturer Contact Information 4 Waterside, Dublin 24, Ireland See more

Review: Good - It's helping me put on weight. I added a tablespoon of peanut butter and a banana, tastes really good with the strawberry one. This seems to be the best mass gainer, I've looked around and this is always said to be the best with approved ingredients. It is sweet tasting but if you add some peanut butter it will tone down the sweetness. I'm just doing pushups, ab crutches, planks and dumbbells. I don't go to a gym. With noticeable growth to my arms and chest, just started working on abs to balance it out. I only started to see results after drinking this stuff. Good price on this bigger bag so I think I'll get this one again in the future.
Review: It’s a must buy ! Best & high quality mass gainer! Imo the best out there - I only use this brand of mass gainer… reason being it sits will in my digestive system, it definitely does what it supposed to do. I have used other brands, cheaper brands but they do not pack the punch this do 💪 I have literally been buying this for over 10 years now & will never use other cheaper products. Yes it’s expensive but quality costs money simple! It mix fairly well. The ingredients are of high quality. In my opinion you will not be disappointed & like I said you will definitely be getting the performance you want. I packed on good quality weight… 2st in 3 months but that’s training 5 days a week keeping meals healthy. Hope you find this review helpful.

## Features

- Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
- No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
- Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
- To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
- Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B015WMRVKW |
| ASIN  | B015WMRVKW |
| Age Range Description | Adult |
| Allergen Information | Contains: Egg may contain, Gluten may contain, Milk, Peanuts may contain, Soy, Tree nuts may contain |
| Best Sellers Rank | 1,020 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 18 in Whey Nutrition Protein |
| Brand | Optimum Nutrition |
| Country of origin | United Kingdom |
| Country of origin  | United Kingdom |
| Customer Reviews | 4.4 4.4 out of 5 stars (30,489) |
| Customer reviews | 4.4 4.4 out of 5 stars (30,489) |
| Date First Available | 28 Sept. 2015 |
| Format | Powder |
| Is discontinued by manufacturer  | No |
| Item model number  | 1101534 |
| Manufacturer  | Optimum Nutrition |
| Manufacturer contact | 4 Waterside, Dublin 24, Ireland |
| Product Dimensions  | 30 x 14 x 42 cm; 5.45 kg |
| Serving Recommendation | One Scoop |
| Units | 5450.0 Grams |
| Weight | 5.44 kg |

## Product Details

- **Brand:** Optimum Nutrition
- **Diet type:** Vegetarian
- **Flavour:** Chocolate Peanut Butter
- **Item weight:** 5.45 Kilograms
- **Material Type Free:** Sugar Free
- **Number of items:** 1
- **Product benefits:** Muscle Growth, Weight Gain
- **Recommended uses for product:** Post-Workout, Pre-Workout
- **Servings per container:** 16
- **Unit count:** 5450.0 Grams

## Images

![Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary - Image 1](https://m.media-amazon.com/images/I/71IB0L5MThL.jpg)

## Questions & Answers

**Q: What's new with Serious Mass?**
A: Not only does Serious Mass have a fresh new look, but it also has added 3 grams of creatine to support your performance.

**Q: The label looks different compared to the previous one I got, is it still the same OPTIMUM NUTRITION product?**
A: As you evolve, so do we. The part of our mission is to help active individuals better understand OPTIMUM NUTRITION products. Now choosing the right product for you is easier with more visible product benefits, features and flavours on each tub.

**Q: The tub is not full to the brim when opened, why is that?**
A: This is completely normal and is to do with the way the powder is vacuum packed into the tub. The powder settles over time. This does not impact the weight or number of servings listed on the label.

**Q: What is the best way to prepare Serious Mass drink?**
A: To get the optimal consistency and prepare your drink in easy and convenient way, we recommend using a blender. For optimal use, follow serving instructions on pack.

**Q: Are the ingredients tested and safe?**
A: All of the ingredients in our products have been approved and considered safe for consumption by the European Food Safety Authority.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by T***S on 23 November 2025*

It's helping me put on weight. I added a tablespoon of peanut butter and a banana, tastes really good with the strawberry one. This seems to be the best mass gainer, I've looked around and this is always said to be the best with approved ingredients. It is sweet tasting but if you add some peanut butter it will tone down the sweetness. I'm just doing pushups, ab crutches, planks and dumbbells. I don't go to a gym. With noticeable growth to my arms and chest, just started working on abs to balance it out. I only started to see results after drinking this stuff. Good price on this bigger bag so I think I'll get this one again in the future.

### ⭐⭐⭐⭐⭐ It’s a must buy ! Best & high quality mass gainer! Imo the best out there
*by L***G on 27 November 2025*

I only use this brand of mass gainer… reason being it sits will in my digestive system, it definitely does what it supposed to do. I have used other brands, cheaper brands but they do not pack the punch this do 💪 I have literally been buying this for over 10 years now & will never use other cheaper products. Yes it’s expensive but quality costs money simple! It mix fairly well. The ingredients are of high quality. In my opinion you will not be disappointed & like I said you will definitely be getting the performance you want. I packed on good quality weight… 2st in 3 months but that’s training 5 days a week keeping meals healthy. Hope you find this review helpful.

### ⭐⭐⭐⭐⭐ Excellent for Weight and Mass Gain
*by B***N on 19 October 2025*

This protein powder is an excellent for anyone serious about gaining mass. The large size offers fantastic value, and the mix is effective and potent. It mixes well, taste good and is essential for hitting those high-calorie and high-protein goals. Highly recommended for fast, reliable results!

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-02*