---
product_id: 306749193
title: "AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds"
brand: "gnc"
price: "27939 kr"
currency: ISK
in_stock: true
reviews_count: 8
category: "Gnc"
url: https://www.desertcart.is/products/306749193-amp-mass-xxx-clinically-proven-weight-gainer-protein-powder-improves
store_origin: IS
region: Iceland
---

# Clinically proven strength boost 50g Protein per serving 780 Calories for mass gain AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds

**Brand:** gnc
**Price:** 27939 kr
**Availability:** ✅ In Stock

## Summary

> 🚀 Bulk smarter, lift stronger, and own your gains with AMP Mass XXX!

## Quick Answers

- **What is this?** AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds by gnc
- **How much does it cost?** 27939 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/306749193-amp-mass-xxx-clinically-proven-weight-gainer-protein-powder-improves)

## Best For

- gnc enthusiasts

## Why This Product

- Trusted gnc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Power-Packed Protein Punch:** Fuel your gains with 50g of high-quality protein per serving to maximize muscle growth and recovery.
- • **Clean & Tested for Champions:** Banned substance tested against 220+ substances, ensuring safe, competition-ready supplementation.
- • **Clinically Proven Performance:** Backed by science, MyoTOR and BETAPOWER accelerate strength and stamina improvements in just 2 weeks.
- • **Calorie Surge for Serious Mass:** Get 780 clean calories designed to help you bulk up faster without compromising nutrition.
- • **Micronized Amino Acids & Creatine:** Enhanced absorption for faster muscle repair and explosive workout energy.

## Overview

AMP Mass XXX is a clinically proven weight gainer protein powder delivering 780 calories and 50g of protein per serving, enriched with MyoTOR, creatine, and betaine to boost muscle strength, size, and endurance. Tested for banned substances, it offers 13 servings of premium mass-building nutrition in a delicious chocolate flavor.

## Description

Buy GNC AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds on desertcart.com ✓ FREE SHIPPING on qualified orders

Review: Great Protein - I love how effective this protein is. Wether it be a replacement for food in the morning or after a Workout, this protein fills me up and taste amazing. Great way to get large amounts of protein and calories in a quick easy way. The cookies and cream taste the best In my opinion but the chocolate is fine. Once I started taking this protein i started seeing progress pretty quick, definitely a game changer.
Review: The best! - This is honestly the best protein powder I’ve ever had.

## Features

- Clinically Proven Gainer: Mass XXX mass gainer combines high-quality protein powder, key nutrients, and science-backed innovations—including MyoTOR, creatine, and BETAPOWER—to fuel proven results and performance
- Increase Mass with 40% Fewer Sets: Delivers 50g of protein, including naturally occurring EAAs, plus carbs, and healthy fats—and it’s clinically proven to help get better results out of workouts
- Improve Muscle Strength in As Early as 2 Weeks: MyoTOR is clinically proven to accelerate improvements in strength with as little as 2 weeks of training and included in every serving of Mass XXX mass gainer
- Improve Stamina: Take resistance training to a new limit with MyoTOR’s clinically studied support for improved muscle endurance and BETAPOWER’s athletic performance benefits
- Banned Substance Tested: Product was tested and monitored for over 220 banned substances on the 2020 World Anti-Doping Agency (WADA) Prohibited list via LGC skip lot testing

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B091D261TY |
| Best Sellers Rank | #85,789 in Health & Household ( See Top 100 in Health & Household ) #50 in Sports Nutrition Weight Gainers |
| Customer Reviews | 4.6 4.6 out of 5 stars (173) |
| Date First Available  | November 28, 2020 |
| Item model number  | 123404 |
| Manufacturer  | GNC |
| Product Dimensions  | 1 x 8 x 10.42 inches; 6.81 Pounds |

## Product Details

- **Brand:** GNC
- **Flavor:** Chocolate
- **Item Weight:** 6.8 Pounds
- **Product Benefits:** Supports overall health and wellness
- **Servings per Container:** 13.0

## Images

![AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds - Image 1](https://m.media-amazon.com/images/I/71N5WqNv6NL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it help you gain weight  ?**
A: it helps a little.  cant rely on it. food helps more obviously.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Protein
*by T***M on August 5, 2023*

I love how effective this protein is. Wether it be a replacement for food in the morning or after a Workout, this protein fills me up and taste amazing. Great way to get large amounts of protein and calories in a quick easy way. The cookies and cream taste the best In my opinion but the chocolate is fine. Once I started taking this protein i started seeing progress pretty quick, definitely a game changer.

### ⭐⭐⭐⭐⭐ The best!
*by K***H on March 16, 2025*

This is honestly the best protein powder I’ve ever had.

### ⭐⭐⭐⭐⭐ Youll grow those muscles!
*by E***H on June 2, 2025*

Love this product! It's just perfect for people who have trouble getting a sweat! This thing will make you sweat!!

## Frequently Bought Together

- GNC AMP Mass XXX, Clinically Proven Weight Gainer Protein Powder, Improves Strength and Size, 780 Calories, 50g Protein, Micronized Amino Acids, Creatine, Betaine, Chocolate, 13 Servings, 6 Pounds
- Optimum Nutrition Micronized Creatine Monohydrate Powder, Unflavored, 120 Servings, 600 Grams (Packaging May Vary)
- Optimum Nutrition Gold Standard 100% Whey Protein Powder, Double Rich Chocolate, 5 Pound (Packaging May Vary)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-06*