--- product_id: 52551546 title: "The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg" brand: "the bulk protein company" price: "¥37955" currency: JPY in_stock: true reviews_count: 8 category: "The Bulk Protein Company" url: https://www.desertcart.jp/products/52551546-the-bulk-protein-company-serious-gainz-mass-gainer-protein-powder store_origin: JP region: Japan --- # 74g carbs complex 27g protein blend 460 kcal per serving The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg **Brand:** the bulk protein company **Price:** ¥37955 **Availability:** ✅ In Stock ## Summary > 🔥 Bulk smarter, not harder with Serious Gainz! 🍫 ## Quick Answers - **What is this?** The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg by the bulk protein company - **How much does it cost?** ¥37955 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/52551546-the-bulk-protein-company-serious-gainz-mass-gainer-protein-powder) ## 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 - • **Indulgent Daily Ritual:** Enjoy a dessert-style Black Forest Gateau flavor that turns bulking into a treat, not a chore. - • **Carb-Loaded Energy Boost:** 74g of complex carbs from oat flour and maltodextrin to replenish glycogen and sustain workouts. - • **Calorie-Packed Powerhouse:** Fuel your gains with 460 calories per serving—perfect for hardgainers chasing serious mass. - • **Mixes Smooth, Drinks Easy:** Optimized for milk blending—shake or blend for a creamy, clump-free texture that fits your busy lifestyle. - • **Multi-Source Protein Fusion:** 27g of fast & sustained-release proteins (whey, soy, casein) to maximize muscle recovery and growth. ## Overview Serious Gainz by The Bulk Protein Company is a 5kg high-calorie mass gainer designed for hardgainers and muscle builders. Each serving delivers 460 calories, 27g of a premium protein blend, and 74g of carbs to support muscle growth, recovery, and steady weight gain. Its rich Black Forest Gateau flavor and smooth mixability make it a delicious daily staple for professionals committed to serious bulking. ## Description Product Description SERIOUS GAINZ by The Bulk Protein Company is a high-calorie mass gainer designed for hardgainers and anyone who struggles to maintain a calorie surplus. Delivering approximately 460 calories, 27g of protein and 74g of carbohydrates per serving, it supports size, strength and steady progress during bulking phases.Each serving combines soy protein, whey isolate, casein and oat flour to provide both fast and sustained amino acid release, helping support muscle recovery, lean muscle growth and improved training performance. Formulated as a versatile bulking protein powder, SERIOUS GAINZ can be mixed with water or milk depending on preference. Many users prefer milk for a smoother, richer texture, while adding liquid first and shaking thoroughly helps reduce clumps and improve consistency. Designed to support consistency, SERIOUS GAINZ helps meet increased nutritional demands throughout your bulking journey. The combination of protein sources and carbohydrates helps refuel muscles, restore glycogen levels and maintain daily calorie intake. Available in a range of flavours including Chocolate, Cookies & Cream, Vanilla, Strawberry and Banana, it fits easily into shakes, oats, smoothies and high-calorie recipes. Ingredients Ingrediens: Ultra-Fine OAT Flour, Ultra-Premium Maltodextrin, SOY Protein Isolate, Coooa Powier, Flavouring, Anti-Caking Agent (Silicon Dioxide), Pea Protein Isolate, Hemp Protein, Sweetener (Sucralose) Directions Mix 3 Scoops (125g) with 400-500ML of water. Once shake 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 Gainz Mass Gainer Protein Powder Black Forest Gateau 5 kg Manufacturer Contact Information Guinness Road Trading Estate, Unit 1& 3, Guinness Rd, Trafford Park, Stretford, Manchester M17 1SB Review: Amazing - Great taste, easy to mix, not lumpy or gritty, gives you a full feeling and makes recovery better Review: Great value for money and no rubbish in the ingredients - Have been using since 20th Jan. I am a vegetarian not vegan so this fits the bill. I think this is the cheapest bulking product that I've found minus the sugar and rubbish so that's a big plus. Everyone will have different results but I train 5 times a week and have seen my weight go up from around 14.7st to 16.5st. Not saying that's down to this product....I take two servings per day so 6 scoops so that may be helping. I also lost a fair amount of weight prior to this year so I am at my natural weight now and looking to bulk up and build additional muscle before cutting. Overall... Great product... decent taste... for extra thickness and calories mix with milk and shake well! ## Features - HIGH-CALORIE MASS GAIN FORMULA WITH ~27G PROTEIN PER SERVING – SERIOUS GAINZ by The Bulk Protein Company delivers approximately 460 calories, 27g protein and 74g carbs per serving, helping support a consistent calorie surplus. Designed for hardgainers and anyone looking to increase size and strength, it supports muscle recovery, training performance and steady weight gain when combined with a structured nutrition plan. - SUPPORTS MUSCLE GROWTH & POST-WORKOUT RECOVERY – Each serving provides a balanced blend of protein and carbohydrates to replenish energy after training and support lean muscle growth. The combination of soy protein, whey isolate, casein and oat flour delivers both fast and sustained amino acid release, helping refuel muscles, restore glycogen levels and maintain a high daily protein intake. - MIXES BEST WITH MILK FOR A SMOOTHER, MORE ENJOYABLE SHAKE – As a bulking protein powder, SERIOUS GAINZ can be prepared with water or milk, though many users prefer milk for a smoother, richer and more consistent texture. Adding liquid first, shaking thoroughly or using a blender helps reduce clumps and creates a creamier shake that’s easier to drink during heavy bulking phases. - SMOOTH, SWEET FLAVOUR EXPERIENCE YOU CAN ENJOY DAILY – This mass gainer delivers a rich, dessert-style taste that makes each shake enjoyable as part of your daily bulking routine. Available in flavours such as Chocolate, Cookies & Cream, Vanilla, Strawberry and Banana, it suits both classic and indulgent preferences. - FILLING FORMULA DESIGNED TO SUPPORT A DAILY CALORIE SURPLUS – This mass gainer delivers a dense, satisfying shake that helps maintain daily calorie targets during bulking phases, supporting consistent nutrition intake. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01AEWOIBU | | Age Range Description | Adult | | Best Sellers Rank | 720 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 15 in Whey Nutrition Protein | | Brand | The Bulk Protein Company | | Brand Name | The Bulk Protein Company | | Customer Reviews | 4.3 out of 5 stars 383 Reviews | | Diet Type | Vegetarian | | Diet type | Vegetarian | | Flavour | Black Forest Gateau | | Global Trade Identification Number | 05060424703654 | | Item Dimensions | 29 x 29 x 26 centimetres | | Item Nype Name | Serious Gainz | | Item Weight | 5 Kilograms | | Item weight | 5 Kilograms | | Manufacturer | Warrior | | Manufacturer Contact Information | Guinness Road Trading Estate, Unit 1& 3, Guinness Rd, Trafford Park, Stretford, Manchester M17 1SB | | Manufacturer Part Number | B142 | | Material Type Free | Fat Free | | Model Name | Serious Gainz | | Model Number | B142 | | Number of Items | 1 | | Package Type Name | Tub | | Protein Source | Whey | | Recommended Uses For Product | Post-Workout, Pre-Workout | | Servings per container | 40 | | Total Servings Per Container | 40 | | UPC | 754465271917 776578406635 | | Unit Count | 5000.0 gram | ## Product Details - **Brand:** The Bulk Protein Company - **Diet type:** Vegetarian - **Flavour:** Black Forest Gateau - **Item weight:** 5 Kilograms - **Material Type Free:** Fat Free - **Number of items:** 1 - **Protein source:** Whey - **Recommended uses for product:** Post-Workout, Pre-Workout - **Servings per container:** 40.0 - **Unit count:** 5000.0 gram ## Images ![The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Image 1](https://m.media-amazon.com/images/I/61ys3QbBscL.jpg) ![The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Image 2](https://m.media-amazon.com/images/I/61TUMxTHQGL.jpg) ![The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Image 3](https://m.media-amazon.com/images/I/615YnBUQ5FL.jpg) ![The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Image 4](https://m.media-amazon.com/images/I/61zReBR0OxL.jpg) ![The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Image 5](https://m.media-amazon.com/images/I/61mBzg3Xd6L.jpg) ## Available Options This product comes in different **Flavor** options. ## Questions & Answers **Q: Ordered black forest received chocolate.....cant stand chocolate flavour powders disappointing** A: yes i was send the wrong flavour. amazon should accept return **Q: I am used to the chocolate. Not available tho. Wots the other flavours like** A: I’m not sure what is available on Amazon but you can get them from bodybuilding warehouse! I think it’s quite cheap at the moment with £39 for 4kg. I had vanilla and banana before and they were ok. **Q: How many of the plastic scoops is a 125g. Serving??** A: To which scoop do you refer to? You get 2 different size scoops in the tub. Both are graduated, 3 of the small scoops areare equal to large scoop. 1 large scoop or 3 small scoops are 1 dosage. I mix with semi-scimmed milk instead of water and put some frozen strawberries in (I got strawberry flavour) tastes lush, piles the weight on. Hope this helps. **Q: Do these products actually help people gain weight as this is what I'm after** A: Couldnt answer that as i gave it away,its minging. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing *by A***0 on 22 February 2026* Great taste, easy to mix, not lumpy or gritty, gives you a full feeling and makes recovery better ### ⭐⭐⭐⭐⭐ Great value for money and no rubbish in the ingredients *by M***N on 14 March 2021* Have been using since 20th Jan. I am a vegetarian not vegan so this fits the bill. I think this is the cheapest bulking product that I've found minus the sugar and rubbish so that's a big plus. Everyone will have different results but I train 5 times a week and have seen my weight go up from around 14.7st to 16.5st. Not saying that's down to this product....I take two servings per day so 6 scoops so that may be helping. I also lost a fair amount of weight prior to this year so I am at my natural weight now and looking to bulk up and build additional muscle before cutting. Overall... Great product... decent taste... for extra thickness and calories mix with milk and shake well! ### ⭐⭐⭐⭐ A very good supplement *by C***Z on 6 August 2018* Okay, so I bought the 'Black Forest Gateau' flavour because people said it tastes like Bakewell Tart and I've been addicted to Bakewell Tarts most of my life! And it is the exact flavour. BUT with the almond frangipan flavour ranked up to 11. I find that adding a big glob of peanut butter [I use Meridian's 'natural brand] helps to take the edge off and also to thicken it as for a weight gainer it has a VERY weak texture and stays quite watery compared to other [almost thickshake] brands. The tub is huge and will last a long time for the price and I don't think it would be possible to get better. The texture is a little rough and not completely smooth but that is because they use actual oat flour [which will NEVER be smooth] in the mix for the carb element instead of 'mega doses of pure sugar' that most weight gainers tend to go with. My power levels within a fortnight were extremely good in their progression, it feeds well. I should add that when I add a new supplement I make it the only change to my regimen for at least a month in order to make sure it is that supplement that I am recording benefits from rather than adding a few at a time and then claiming one specific one doesn't work! This will now become my 'weight gainer of choice' though I may experiment with other flavours. I've only knocked the one star off due to the frangipan being a bit over the top! But all in all a fantastic product and I would not hesitate to recommend it. ## Frequently Bought Together - The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Black Forest Gateau 5kg - Warrior Protein Shaker Bottle, Includes Wire Mixball Blender – 600ml – Perfect for Mixing Powdered Shakes, Clear, BPA Free, Dishwasher Safe --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/52551546-the-bulk-protein-company-serious-gainz-mass-gainer-protein-powder](https://www.desertcart.jp/products/52551546-the-bulk-protein-company-serious-gainz-mass-gainer-protein-powder) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-06*