--- product_id: 18548319 title: "Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB" brand: "optimum nutrition" price: "R7825" currency: ZAR in_stock: true category: "Optimum Nutrition" url: https://www.desertcart.co.za/products/18548319-optimum-nutrition-serious-mass-protein-powder-chocolate-peanut-butter-12lb store_origin: ZA region: South Africa --- # 250g carbs per serving 50g blended protein 1200+ calories/serving Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB **Brand:** optimum nutrition **Price:** R7825 **Availability:** βœ… In Stock ## Summary > πŸ’₯ Bulk smarter, not harder with Serious Mass! ## Quick Answers - **What is this?** Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB by optimum nutrition - **How much does it cost?** R7825 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/18548319-optimum-nutrition-serious-mass-protein-powder-chocolate-peanut-butter-12lb) ## 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 - β€’ **Carb Overload:** 250 grams of complex carbs to keep your energy and bulk on point all day long. - β€’ **Protein Packed:** 50 grams of premium whey blend to amplify muscle growth and recovery. - β€’ **Customizable Fuel:** Blend with fruits, nuts, or peanut butter for a personalized, calorie-dense shake that fits your lifestyle. - β€’ **Calorie Powerhouse:** Fuel your gains with 1,200+ calories per 2-scoop servingβ€”because size matters. - β€’ **Immune Boost Formula:** 20+ vitamins & minerals including Vitamin C & Zinc to keep you strong inside and out. ## Overview Optimum Nutrition Serious Mass Chocolate Peanut Butter is a high-calorie weight gainer delivering over 1,200 calories, 50g of blended whey protein, and 250g of carbohydrates per 2-scoop serving. Enhanced with 20+ vitamins and minerals for immune support, it’s designed for adults aiming to maximize muscle growth and weight gain through convenient, versatile shakes. ## 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. ## Features - HIGH CALORIE WEIGHT GAINER: More than 1,200 calories per 2-scoop serving - 50 grams of blended protein per 2-scoop serving - 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 | B00OV0VYHI | | Age Range Description | Adult | | Allergen Information | Milk, Soy | | Best Sellers Rank | #1,769 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #303 in Sales & Deals | | Brand | Optimum Nutrition | | Brand Name | Optimum Nutrition | | Customer Reviews | 4.5 out of 5 stars 4,970 Reviews | | Diet Type | Vegetarian | | Flavor | Chocolate Peanut Butter | | Global Trade Identification Number | 00748927052572 | | Item Dimensions | 11.5 x 5.5 x 16 inches | | Item Highlight | Weight Gainer Protein Powder, Mass Gainer with Whey Protein, Creatine, Glutamine, BCAAs, Vitamins & Minerals, Easy Mixing | | Item Weight | 12 pounds | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer Part Number | 1056371 | | Material Type Free | Caffeine Free | | Model Name | ON SERIOUS MASS CHOC PB 12LB | | Model Number | 1056371 | | 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 | 748927052572 | | Unit Count | 192 Ounce | | Vitamins And Minerals | 0.9, 3.7, 30, 5, 700 milligrams | ## Product Details - **Brand:** Optimum Nutrition - **Flavor:** Chocolate Peanut Butter - **Item Weight:** 12 pounds - **Material Type Free:** Caffeine Free - **Servings per Container:** 16 ## Images ![Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB - Image 1](https://m.media-amazon.com/images/I/511yjH27xML.jpg) ![Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB - Image 2](https://m.media-amazon.com/images/I/61JYUH2GP3L.jpg) ![Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB - Image 3](https://m.media-amazon.com/images/I/718fy5d-LWL.jpg) ![Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB - Image 4](https://m.media-amazon.com/images/I/6131C1TesqL.jpg) ![Optimum Nutrition Serious Mass Protein Powder, Chocolate Peanut Butter 12LB - Image 5](https://m.media-amazon.com/images/I/61AbYOXhCwL.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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/18548319-optimum-nutrition-serious-mass-protein-powder-chocolate-peanut-butter-12lb](https://www.desertcart.co.za/products/18548319-optimum-nutrition-serious-mass-protein-powder-chocolate-peanut-butter-12lb) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-28*