---
product_id: 49431403
title: "Serious Protein Bulk Protein Powder 4kg Meal Replacement Shake | Protein Powder, 133 Servings, Milk & Soy Isolate, Glutamine Peptides, Low Carb, Low Sugar, Muscle Growth (Chocolate)"
brand: "the bulk protein company"
price: "¥37758"
currency: JPY
in_stock: true
reviews_count: 8
category: "The Bulk Protein Company"
url: https://www.desertcart.jp/products/49431403-serious-protein-bulk-protein-powder-4kg-meal-replacement-shake-protein
store_origin: JP
region: Japan
---

# 24g complete protein per serving Low-carb, low-sugar, low-fat formula 4kg bulk tub with 133+ servings Serious Protein Bulk Protein Powder 4kg Meal Replacement Shake | Protein Powder, 133 Servings, Milk & Soy Isolate, Glutamine Peptides, Low Carb, Low Sugar, Muscle Growth (Chocolate)

**Brand:** the bulk protein company
**Price:** ¥37758
**Availability:** ✅ In Stock

## Summary

> 🔥 Serious Gains, Zero Compromise 💥

## Quick Answers

- **What is this?** Serious Protein Bulk Protein Powder 4kg Meal Replacement Shake | Protein Powder, 133 Servings, Milk & Soy Isolate, Glutamine Peptides, Low Carb, Low Sugar, Muscle Growth (Chocolate) by the bulk protein company
- **How much does it cost?** ¥37758 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/49431403-serious-protein-bulk-protein-powder-4kg-meal-replacement-shake-protein)

## Best For

- the bulk protein company enthusiasts

## Why This Product

- Trusted the bulk protein company brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Up Your Routine:** Massive 4kg tub delivers over 133 servings—serious value for serious gains.
- • **Lean & Clean Nutrition:** Low in carbs, sugar, and fat—perfect for cutting phases and maintaining a lean physique without compromise.
- • **Muscle Fuel, No Filler:** 24g of premium milk & soy protein blend powers muscle repair and recovery every day.
- • **Mixes Smooth, Drinks Easy:** Optimized for shaker or blender use—no lumps, just creamy consistency to fuel your busy day.
- • **Flavors That Fit Your Lifestyle:** From Salted Caramel to Cookies & Cream, enjoy clean, balanced taste without artificial overload.

## Overview

Serious Protein Bulk Protein Powder offers a powerful 24g protein blend per serving from milk protein concentrate, soy isolate, and glutamine peptides, designed to support muscle repair, recovery, and lean muscle maintenance. With low carbs, sugar, and fat, this 4kg tub provides over 133 servings of high-quality, great-tasting protein in multiple flavors, optimized for smooth mixing and daily use by active men and women.

## Description

Product Description SERIOUS PROTEIN by The Bulk Protein Company is designed for anyone who wants reliable, high-quality protein support without unnecessary sugars, fillers or excess calories. Each serving provides 24g of complete protein from a balanced blend of milk protein concentrate, soy protein isolate and glutamine peptides, helping support muscle repair, recovery and strength as part of your daily fitness routine. Whether you train regularly at the gym, follow a high-protein diet or simply want a convenient way to increase your protein intake, SERIOUS PROTEIN delivers dependable nutrition at outstanding value. This large 4kg tub offers over 133 servings, making it ideal for athletes, active individuals and those following structured nutrition plans. The blended protein formula supports steady digestion and sustained amino acid release, helping you stay on track with lean muscle goals, weight management or cutting phases. With low carbs, low sugar and low fat, it is a smart choice for maintaining a high-protein lifestyle without adding unnecessary calories to your day. SERIOUS PROTEIN is available in a range of delicious flavours, including Banana, Choc Peanut Butter, Chocolate, Cookies & Cream, Salted Caramel and Strawberry. Each flavour is crafted for a clean, enjoyable taste without overpowering sweetness or strong artificial aromas often associated with budget protein powders. Enjoy it in protein shakes, smoothies, oats, baking or high-protein recipes to add variety to your routine. For best results, mix with water or milk in a shaker with a mixer ball or use a blender for an even smoother texture. This helps reduce clumps and gritty mouthfeel, creating a more satisfying shake that fits easily into busy lifestyles. Whether used as a daily protein shake, post-workout drink, meal replacement shake, pre-workout boost or as part of meal prep, SERIOUS PROTEIN offers flexibility, consistency and great value for men & women seeking daily protein nutrition. Ingredients SOY Protein Isolate, Glutamine Peptides (WHEAT), MILK Protein Concentrate, Maltodextrin, Cocoa Powder, Flavouring, Sweetener (Sucralose) Directions Directions: Mix 1 rounded scoop (30g) with 250ml of water and shake well before use. Once the shake is prepared consume the same day. Safety Warning Advisory: Intended for use by healthy adults, over the age of 18. Please store in a cool, dry place out of reach of children. Box Contains 1 x The Bulk Protein Company Serious Protein Powder (Chocolate, 4 Kg) Manufacturer Contact Information Distributed by: KBF Enterprises Unit 1, Guinness Rd Trading Est, Guinness Road, M17 1SB, UK

Review: Serious protein, Serious value - Extremely good value protein powder, I've always paid under £30.00 for this product and in my opinion it's very tasty when mixed with milk, its not as nice with water but still drinkable, it mixes easily with a shaker mug no lumps with a vigorous shake,I've now reordered this 4 times, iam seeing good results and iam more than happy with it,
Review: Great price compared to alternatives - I read a lot of reviews before deciding to take a chance on this product, hopefully this is useful to someone else. I've been using the product for a few weeks now, here are my thoughts. When I came to the end of my last batch of protein powder and looked to replace it I was shocked at the price and started looking for alternatives, and Serious Protein came up. There were mixed reviews and I thought long and hard about it, but the price was so attractive I decided to give it a go and I'm glad I did. There were two main issues I saw raised by other reviewers: lumps and taste. Lumps: The product is a lot thicker than the far more expensive alternative I was using before. I now use at least 300ml of water in the shaker, and shake for a good hard 30 seconds. I now have minimal lumps which I don't find to be a problem. I suggest that anyone having problems with lumps is not using enough water (I used to use 200-250ml) and/or not shaking enough. Taste: This is far less sweet than that other product, but I really don't find it offensive. I'm also happier to have less artificial sweetener every day. My rating: This is so much cheaper than the other product I was using that I'm happy to put up with the extra water, extra shaking, and less sweetness. Well worth it in my opinion.

## Features

- HIGH-PROTEIN SHAKE FOR DAILY MUSCLE SUPPORT – Each serving of The Bulk Protein Company's SERIOUS PROTEIN provides 24g of complete protein from a blend of milk protein concentrate and soy protein isolate, supporting muscle repair, recovery and everyday strength goals. Ideal for post-workout shakes, high-protein diets, meal prep or maintaining lean muscle. Mixes best in a shaker or blender for a smoother, more satisfying protein drink you can enjoy anytime.
- BLENDED PROTEIN DRINK FORMULA FOR BETTER ABSORPTION & BALANCE – A high-protein blend made with milk protein concentrate, soya protein isolate and glutamine peptides to support steady muscle repair, recovery and strength throughout the day. This bulk 4kg protein powder offers over 133 servings, giving excellent value for daily high protein shakes, high-protein diets, meal prep and maintaining lean muscle goals while fitting easily into any fitness routine.
- LOW-CALORIE, EVERYDAY PROTEIN FOR MEN & WOMEN – A high-quality protein blend designed with low carbs, low sugar and low fat to support lean goals, weight management and active lifestyles. Ideal for high-protein diets, cutting phases, gym training and daily fitness routines, offering a simple way to increase protein intake without unnecessary calories. Perfect for adding into shakes, smoothies, oats or high-protein meal prep.
- DELICIOUS FLAVOURS WITH A SMOOTHER, MORE BALANCED TASTE – Available in Banana, Choc Peanut Butter, Chocolate, Cookies & Cream, Salted Caramel and Strawberry, this protein powder delivers a clean, enjoyable flavour without overpowering sweetness or strong artificial aromas. Ideal for daily protein shakes, smoothies, oats or high-protein recipes, giving you flexible ways to enjoy each flavour in your routine.
- EASY-MIX SHAKE WITH IMPROVED TEXTURE & CONSISTENCY – Designed for smoother mixing, this high-protein blend works best in a shaker with a mixer ball or a blender to help reduce clumps and gritty texture. Many customers enjoy the creamy consistency when mixed with water or milk, making it ideal for daily protein shakes, meal replacement shake, pre workout powder, post-training recovery, meal prep or adding extra protein to oats, smoothies and high-protein recipes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01CCSJRP6 |
| Age Range Description | Adult |
| Allergen Information | Contains: Peanuts, Soy, Wheat |
| Benefits | Muscle Growth |
| Best Sellers Rank | 962 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 19 in Whey Nutrition Protein |
| Brand | The Bulk Protein Company |
| Brand Name | The Bulk Protein Company |
| Country Of Origin | United Kingdom |
| Customer Reviews | 3.9 out of 5 stars 1,305 Reviews |
| Diet Type | Vegetarian |
| Diet type | Vegetarian |
| Flavour | Chocolate |
| Item Dimensions | 28.5 x 28.5 x 26 centimetres |
| Item Nype Name | Serious Protein |
| Item Weight | 4 Kilograms |
| Item weight | 4 Kilograms |
| Manufacturer | KBF Enterprises |
| Manufacturer Contact Information | Distributed by: KBF Enterprises Unit 1, Guinness Rd Trading Est, Guinness Road, M17 1SB, UK |
| Manufacturer Part Number | B150 |
| Material Type Free | Fat Free |
| Model Name | Serious Protein |
| Model Number | B150 |
| Number of Items | 1 |
| Package Type Name | Tub |
| Protein Source | Casein, Egg, Whey |
| Recommended Uses For Product | Post-Workout |
| Servings per container | 133.0 |
| Total Servings Per Container | 133.0 |
| Unit Count | 4000.0 gram |

## Product Details

- **Brand:** The Bulk Protein Company
- **Diet type:** Vegetarian
- **Flavour:** Chocolate
- **Item weight:** 4 Kilograms
- **Material Type Free:** Fat Free
- **Product benefits:** Muscle Growth
- **Protein source:** Casein, Egg, Whey
- **Recommended uses for product:** Post-Workout
- **Servings per container:** 133.0
- **Unit count:** 4000.0 gram

## Images

![Serious Protein Bulk Protein Powder 4kg Meal Replacement Shake | Protein Powder, 133 Servings, Milk & Soy Isolate, Glutamine Peptides, Low Carb, Low Sugar, Muscle Growth (Chocolate) - Image 1](https://m.media-amazon.com/images/I/61x5nn+PdOL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be a hot drink?**
A: I guess it could be. Not sure how nice it would be.

**Q: my package arrived without the safety sealed tab on tub, is this normal?**
A: No this is not normal. Best to contract the supplier.

**Q: So it’s all soy now, not a mixture of the 3, if so I won’t be buying anymore**
A: Yeah the main protein is soy isolate with a bit of milk protein. It's rubbish now so I don't use it anymore .

**Q: how much  milk based % protein is inside?**
A: Does contain milk protein see video

## Customer Reviews

### ⭐⭐⭐⭐⭐ Serious protein, Serious value
*by J***S on 14 July 2026*

Extremely good value protein powder, I've always paid under £30.00 for this product and in my opinion it's very tasty when mixed with milk, its not as nice with water but still drinkable, it mixes easily with a shaker mug no lumps with a vigorous shake,I've now reordered this 4 times, iam seeing good results and iam more than happy with it,

### ⭐⭐⭐⭐⭐ Great price compared to alternatives
*by K***R on 20 July 2026*

I read a lot of reviews before deciding to take a chance on this product, hopefully this is useful to someone else. I've been using the product for a few weeks now, here are my thoughts. When I came to the end of my last batch of protein powder and looked to replace it I was shocked at the price and started looking for alternatives, and Serious Protein came up. There were mixed reviews and I thought long and hard about it, but the price was so attractive I decided to give it a go and I'm glad I did. There were two main issues I saw raised by other reviewers: lumps and taste. Lumps: The product is a lot thicker than the far more expensive alternative I was using before. I now use at least 300ml of water in the shaker, and shake for a good hard 30 seconds. I now have minimal lumps which I don't find to be a problem. I suggest that anyone having problems with lumps is not using enough water (I used to use 200-250ml) and/or not shaking enough. Taste: This is far less sweet than that other product, but I really don't find it offensive. I'm also happier to have less artificial sweetener every day. My rating: This is so much cheaper than the other product I was using that I'm happy to put up with the extra water, extra shaking, and less sweetness. Well worth it in my opinion.

### ⭐ 1 star is Generous, Truly Horrible
*by S***W on 17 April 2026*

This is actually my first ever 1 star review. Normally I’d just move on, but I genuinely feel like I need to warn others about this. I only bought it because it seemed like great value 4kg for around £30 is much cheaper than most other brands. I read a mix of reviews and decided to take a chance, thinking at worst it would be okay for the price. Unfortunately, it was far worse than expected. On the positive side, it arrived quickly and when I first opened the bag it actually smelled quite nice. I couldn’t find a scoop inside, but I had a spare so not a huge issue. However, the taste is absolutely terrible. There’s no real hint of chocolate at all, and the aftertaste is honestly like smelly feet, really unpleasant. I gave it another chance using 2 scoops with 500ml of water, but that made things even worse. The consistency turned thick and glue like, and the taste somehow became even more unbearable. I even tried giving it away to friends, and every single one refused after trying it. It’s so bad I couldn’t even give it away for free. Really disappointing purchase, cheap for a reason. Avoid.

## Frequently Bought Together

- SERIOUS PROTEIN – Protein Powder – 4kg – Low Carb – Supports Lean Muscle Growth – Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)
- Warrior Protein Shaker Bottle, Includes Wire Mixball Blender – 600ml – Perfect for Mixing Powdered Shakes, Clear, BPA Free, Dishwasher Safe

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-13*