--- product_id: 1047483 title: "Serious Mass Weight Gainer Protein Powder, Chocolate 12LB | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing" brand: "optimum nutrition" price: "€ 320.10" currency: EUR in_stock: true reviews_count: 13 category: "Optimum Nutrition" url: https://www.desertcart.hr/products/1047483-serious-mass-weight-gainer-protein-powder-chocolate-12lb-weight-gainer store_origin: HR region: Croatia --- # 250g+ carbs/serving 50g protein blend 1200+ kcal/serving Serious Mass Weight Gainer Protein Powder, Chocolate 12LB | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing **Brand:** optimum nutrition **Price:** € 320.10 **Availability:** ✅ In Stock ## Summary > 💥 Bulk up smarter, not harder with Serious Mass! ## Quick Answers - **What is this?** Serious Mass Weight Gainer Protein Powder, Chocolate 12LB | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing by optimum nutrition - **How much does it cost?** € 320.10 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/1047483-serious-mass-weight-gainer-protein-powder-chocolate-12lb-weight-gainer) ## 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 - • **Calorie Powerhouse:** Fuel your gains with 1,200+ calories per 2-scoop serving—perfect for fast metabolisms and serious muscle builders. - • **Carb-Loaded Energy:** Over 250 grams of carbohydrates to replenish glycogen and keep you energized all day long. - • **Immune Boost Formula:** Enhanced with 20+ vitamins and minerals including Vitamin C and Zinc to keep your defenses strong while you bulk. - • **Customizable Mass Builder:** Blend with fruits, nuts, or peanut butter for a personalized calorie boost that fits your lifestyle and taste. - • **Protein-Packed Performance:** 50 grams of premium blended protein to support muscle recovery and growth after every workout. ## Overview Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories, 50g of protein, and 250g+ carbs per serving, enriched with 20+ vitamins and minerals for immune support. Ideal for adults aiming to increase muscle mass and overall weight, it blends smoothly with customizable add-ins to maximize your daily calorie intake and post-workout recovery. ## Description More calories. More protein. More carbs. SERIOUS MASS by Optimum Nutrition serves over 1,200 calories, 50g of blended protein, and over 249g of carbohydrates per 2-scoop serving to help you maximize your daily caloric intake – the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with more tools to help you pack on pounds, when taken in addition to normal calorie intake and over time with regular resistance training. Review: It helps a lot - Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product. Review: Good Stuff! - Amazing!! After losing 25lbs from an illness, this stuff came in clutch. I’ve been having trouble getting my appetite back, so I started drinking the shakes 2-3 times a day to supplement what I do eat. I’m up 10lbs. The taste is pretty good too. It’s not gritty or chalky either. I really like the chocolate. I mix it with ice and milk. Enjoy 😊 ## Features - HIGH CALORIE WEIGHT GAINER: More than 1,200 calories per 2-scoop serving - 50 grams of blended protein per 2-scoop serving - Over 250 grams of carbohydrates per 2-scoop serving - With over 20 vitamins and minerals including Vitamin C and Zinc to provide immune support - MORE VERSATILITY: Using an electric blender, add fresh or frozen fruits, peanut butter, nuts, and other calorie dense foods to boost your weight gain potential ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000GIPJ0M | | Age Range Description | Adult | | Allergen Information | Milk, Soy | | Best Sellers Rank | #2,028 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #252 in Sales & Deals | | Brand | Optimum Nutrition | | Brand Name | Optimum Nutrition | | Customer Reviews | 4.5 out of 5 stars 34,688 Reviews | | Diet Type | Vegetarian | | Flavor | Chocolate | | Global Trade Identification Number | 00748927023800 | | Item Dimensions | 11.5 x 5.5 x 16 inches | | Item Weight | 12 pounds | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer Part Number | 1101529 | | Material Type Free | Caffeine Free | | Model Name | ON SERIOUS MASS CHOCOLATE 12LB | | Model Number | 1101529 | | Net Content Volume | 13.88 liters | | Number of Items | 1 | | Package Type Name | Tub | | Product Benefits | Immune Support, Muscle Growth, Weight Gain | | Protein | 50 g | | Protein Source | Whey | | Recommended Uses For Product | Calorie Increase, Muscle Growth, Post-Workout, Weight Gain | | Servings per Container | 16 | | Supplement Formulation | Multi-Supplement | | Total Servings Per Container | 16 | | UPC | 748927023800 748927063592 | | Unit Count | 192 Ounce | | Vitamins And Minerals | 0.9, 3.7, 30, 5, 700 milligrams, 100, 100, 1560, 410, 44, 59, 80 percent_daily_value_fda | ## Product Details - **Brand:** Optimum Nutrition - **Flavor:** Chocolate - **Item Weight:** 12 pounds - **Material Type Free:** Caffeine Free - **Servings per Container:** 16 ## Images ![Serious Mass Weight Gainer Protein Powder, Chocolate 12LB | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing - Image 1](https://m.media-amazon.com/images/I/71HjvVnPj5L.jpg) ## Available Options This product comes in different **Size, Flavor** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ It helps a lot *by K***S on December 7, 2025* Optimum Nutrition Serious Mass is a great choice for anyone looking to gain weight, build muscle, or increase overall calorie intake. The Chocolate flavor mixes smoothly—especially if you use a blender—and has a rich, dessert-like taste without being overly sweet. Each serving delivers a very high amount of calories, protein, and carbs, which makes it ideal for people with fast metabolisms or those who struggle to eat enough throughout the day. It also includes added vitamins, minerals, and creatine for extra support. The bag is large and lasts a good amount of time depending on how much you use. The powder is heavy, so mixing by hand can be a bit difficult, but blending solves that problem easily. Overall, Serious Mass is effective for healthy weight gain and muscle-building goals. If you need a calorie boost and don’t mind a thick shake, it’s a solid and reliable product. ### ⭐⭐⭐⭐⭐ Good Stuff! *by A***R on July 31, 2026* Amazing!! After losing 25lbs from an illness, this stuff came in clutch. I’ve been having trouble getting my appetite back, so I started drinking the shakes 2-3 times a day to supplement what I do eat. I’m up 10lbs. The taste is pretty good too. It’s not gritty or chalky either. I really like the chocolate. I mix it with ice and milk. Enjoy 😊 ### ⭐⭐⭐⭐⭐ Great product and price *by C***R on July 10, 2026* Great taste, mixes easy and great price ## Frequently Bought Together - Optimum Nutrition Serious Mass, Weight Gainer Protein Powder with Creatine - Nutricost Creatine Monohydrate Micronized Powder 500G, 5000mg Per Serv (5g) - 100 Servings, 17.9 Oz - VELOMIX -2 Pack- 28 oz Protein Shaker Bottles for Protein Mixes - 2x Wire Whisk | Leak Proof Shaker Cups for Protein Shakes | Protein Shaker Bottle Pack | Shakers for Protein Shakes-Black&Transparent --- ## 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.hr/products/1047483-serious-mass-weight-gainer-protein-powder-chocolate-12lb-weight-gainer](https://www.desertcart.hr/products/1047483-serious-mass-weight-gainer-protein-powder-chocolate-12lb-weight-gainer) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-20*