--- product_id: 632075850 title: "Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)" brand: "optimum nutrition" price: "¥39539" currency: JPY in_stock: true category: "Optimum Nutrition" url: https://www.desertcart.jp/products/632075850-optimum-nutrition-serious-mass-weight-gainer-protein-powder-for-muscle store_origin: JP region: Japan --- # 22 vitamins & minerals 50g blended protein 1200+ calories/serving Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) **Brand:** optimum nutrition **Price:** ¥39539 **Availability:** ✅ In Stock ## Summary > 💥 Serious Gains, Serious Flavor — Don’t Just Bulk, Dominate! ## Quick Answers - **What is this?** Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) by optimum nutrition - **How much does it cost?** ¥39539 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/632075850-optimum-nutrition-serious-mass-weight-gainer-protein-powder-for-muscle) ## 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 - • **Power-Packed Protein:** 50 grams of premium blended protein to sculpt muscle and accelerate recovery. - • **Trusted & Top-Ranked:** Join thousands of pros who rate it 4.5 stars and trust Optimum Nutrition for serious results. - • **Massive Calorie Boost:** Fuel your gains with 1,200+ calories per 2-scoop serving—because average just won’t cut it. - • **Customizable Nutrition:** Blend with fruits, nuts, or peanut butter for a personalized calorie surge that fits your lifestyle. - • **Immune-Defending Formula:** 22 essential vitamins & minerals including Vitamin C, D, and Zinc to keep you strong inside and out. ## Overview Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories, 50 grams of blended protein, and 250+ grams of carbs per serving. Enhanced with 22 vitamins and minerals for immune support, this chocolate peanut butter formula is designed for adults seeking rapid muscle gain and recovery. Versatile for blending with calorie-dense add-ins, it’s a top-rated, caffeine-free supplement trusted by fitness enthusiasts worldwide. ## Description Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) : desertcart.ae: Health ## Features - High calorie weight gainer: more than 1,200 calories per 2-scoop serving - 50 grams of blended protein per serving - Over 250 of carbohydrates per serving - 22 vitamins and minerals including Vitamin C, Vitamin D, 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 | B00OV0VYHI | | ASIN | B00OV0VYHI | | Age Range Description | Adult | | Best Sellers Rank | #8,103 in Health ( See Top 100 in Health ) #388 in Sports Supplements | | Brand Name | Optimum Nutrition | | Customer Reviews | 4.5 4.5 out of 5 stars (5,735) | | Customer reviews | 4.5 4.5 out of 5 stars (5,735) | | Diet Type | Vegetarian | | Flavor | Chocolate Peanut Butter | | Global Trade Identification Number | 00748927052572 | | Is Discontinued By Manufacturer | No | | Item Dimensions | 29.2 x 14 x 40.6 centimeters | | Item Weight | 12 Pounds | | Item model number | 1056371 | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer Part Number | 1056371 | | Material Type Free | Caffeine Free | | Model Number | 1056371 | | Number of Items | 1 | | Product Dimensions | 29.21 x 13.97 x 40.64 cm; 5.44 kg | | UPC | 748927052572 | | Unit Count | 5443.1 Grams | ## Product Details - **Brand:** Optimum Nutrition - **Diet type:** Vegetarian - **Flavour:** Chocolate Peanut Butter - **Item weight:** 12 Pounds - **Material type free:** Caffeine Free ## Images ![Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) - Image 1](https://m.media-amazon.com/images/I/511yjH27xML.jpg) ## Available Options This product comes in different **Size, Flavor** options. ## Frequently Bought Together - Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) - Optimum Nutrition Micronized Creatine Monohydrate Powder, Unflavored, 120 Servings, 600 Grams (Packaging May Vary) --- ## 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/632075850-optimum-nutrition-serious-mass-weight-gainer-protein-powder-for-muscle](https://www.desertcart.jp/products/632075850-optimum-nutrition-serious-mass-weight-gainer-protein-powder-for-muscle) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-24*