---
product_id: 529639504
title: "One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg)"
brand: "reflex nutrition"
price: "$394.51"
currency: USD
in_stock: true
reviews_count: 5
category: "Reflex Nutrition"
url: https://www.desertcart.us/products/529639504-one-stop-xtreme-serious-mass-protein-powder-55g-protein-10
store_origin: US
region: United States of America
---

# One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg)

**Brand:** reflex nutrition
**Price:** $394.51
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) by reflex nutrition
- **How much does it cost?** $394.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/529639504-one-stop-xtreme-serious-mass-protein-powder-55g-protein-10)

## Best For

- reflex nutrition enthusiasts

## Why This Product

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

## Description

One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg)

Review: First Class Quality - My favourite lean gainer .
Review: Good value - Requires a very large cup full of powder for the serving advertised so be aware the flour is decent not bad at all this is my 3rd purchase it’s good value

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07PRSRQB5 |
| Age Range Description | Adult |
| Brand | Reflex Nutrition |
| Brand Name | Reflex Nutrition |
| Customer Reviews | 3.8 out of 5 stars 28 Reviews |
| Flavor | Cookies & Cream |
| Global Trade Identification Number | 05033579013152 |
| Item Dimensions | 7.99 x 7.99 x 11.81 inches |
| Item Weight | 4350 Grams |
| Manufacturer | QJWm |
| Manufacturer Part Number | FID52574 |
| Model Number | One Stop Xtreme |
| Number of Items | 1 |
| Protein Source | Whey |
| Recommended Uses For Product | Muscle Build |
| Unit Count | 1.00 Count |

## Product Details

- **Brand:** Reflex Nutrition
- **Flavor:** Cookies & Cream
- **Item Weight:** 4350 Grams
- **Protein Source:** Whey
- **Unit Count:** 1.00 Count

## Images

![One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) - Image 1](https://m.media-amazon.com/images/I/71PZRm29eJL.jpg)
![One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) - Image 2](https://m.media-amazon.com/images/I/71Og-T6fQDL.jpg)
![One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) - Image 3](https://m.media-amazon.com/images/I/71QOzdSPXIL.jpg)
![One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) - Image 4](https://m.media-amazon.com/images/I/71dh+wGZiNL.jpg)
![One Stop Xtreme Serious Mass Protein Powder 55g Protein 10.3g BCAA'S, 73g Low GI Carbs 5,000mg Creatine & Added Vitamins (Cookies and Cream, 4.35kg) - Image 5](https://m.media-amazon.com/images/I/71odmTlxsmL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ First Class Quality
*by K***. on December 19, 2025*

My favourite lean gainer .

### ⭐⭐⭐⭐⭐ Good value
*by C***E on April 3, 2026*

Requires a very large cup full of powder for the serving advertised so be aware the flour is decent not bad at all this is my 3rd purchase it’s good value

### ⭐ Avoid cookies and cream
*by M***L on May 8, 2026*

It tastes disgusting

## Frequently Bought Together

- Reflex Nutrition One Stop® Xtreme - Serious Mass Gainer - All in One Protein Powder - 55g Protein, 10.3g BCAAs, 5,000mg Creatine - Muscle Building Protein Shake (Cookies & Cream, 4.35kg)
- Reflex Nutrition Reflex Pre Workout Powder 3000 mg Citrulline Malate 1600 mg Beta-Alanine 125 mg Caffeine Plus B Vitamins and Electrolytes (Fruit Punch) (300 g)

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**Shop now:** [https://www.desertcart.us/products/529639504-one-stop-xtreme-serious-mass-protein-powder-55g-protein-10](https://www.desertcart.us/products/529639504-one-stop-xtreme-serious-mass-protein-powder-55g-protein-10)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-11*