--- product_id: 632075850 title: "Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)" brand: "optimum nutrition" price: "R5512" currency: ZAR in_stock: true reviews_count: 5 category: "Optimum Nutrition" url: https://www.desertcart.co.za/products/632075850-serious-mass-weight-gainer-protein-powder-for-muscle-gain-added store_origin: ZA region: South Africa --- # 22 vitamins & minerals 50g protein blend 1,250 calories/serving Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary) **Brand:** optimum nutrition **Price:** R5512 **Availability:** ✅ In Stock ## Summary > 💥 Bulk smarter, recover faster, and own your transformation! ## Quick Answers - **What is this?** 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?** R5512 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/632075850-serious-mass-weight-gainer-protein-powder-for-muscle-gain-added) ## 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 a massive 1,250 calories per 2-scoop serving—perfect for serious bulkers. - • **Muscle Recovery Boost:** 50 grams of premium blended protein to accelerate muscle repair and growth post-workout. - • **Trusted Bulk Solution:** A top-ranked, caffeine-free formula favored by thousands for rapid, effective weight gain. - • **Customizable Nutrition:** Blend with fruits, nuts, or peanut butter to tailor your shake and maximize calorie intake effortlessly. - • **Immune Defense Formula:** Packed with 22 essential vitamins and minerals including Vitamin C, D, and Zinc to keep you strong. ## Overview Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering 1,250 calories and 50 grams of protein per serving, enhanced with 22 vitamins and minerals for immune support. Designed for adults seeking rapid muscle gain, this vegetarian-friendly, caffeine-free powder offers versatile blending options to customize your nutrition and accelerate your bulk with trusted quality. ## Description Serious Mass is the ultimate in weight gain formulas. With 1,250 calories per serving and 50 grams of protein for muscle recovery support, this instantized powder makes the ideal post-workout and between meals shake for sizing up your goals. Serious Mass provides you with the tools you need to pack on the pounds and help you develop the physique you’ve always wanted. Review: Bon produit - BIEN Review: IF YOU DONT CARE ABOUT CHEMICALS BUY THIS - when I was younger I would pound a couple of these protein shakes before school. However now that I’m older I’ve been a lot more conscious of what I put in my body and I would never buy this product because of the long list of chemicals. Look, if you want to put on muscle FAST get it. However, don’t rely on bs products to keep your body up. We Americans tend to see FAST RESULTS and jump on any product. Read the ingredients NOT the calories (in general) Quality: pretty good 👍🏼 Taste: the peanut butter one is my favorite 9/10 The vanilla is HORRIBLE 1/10 The chocolate is decent 6/10 Dissolves/mixability: not the BEST but it get the job done. ! DIGESTION ! : everyone knows the drill. It’s a bit taxing on your stomach if you know what I mean Scoop size: humongous when I first saw the TWO scoops you need for the protein I was like yeaaa definitely splitting this jawn in to two protein shakes. Summary: don’t rely on weight gainers for ever, only if you need to put muscle FAST or have issue with weight and are really skinny. For moms looking to help their kids and make them feel more confident I think this is a great product. However, eat real food. My biggest advice. You can’t shortcut what nature intended. (I put on a great deal of muscle using this and really did help me bulk up) ## 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 | | Age Range Description | Adult | | Best Sellers Rank | #7,908 in Health ( See Top 100 in Health ) #421 in Sports Supplements | | Brand | Optimum Nutrition | | Brand Name | Optimum Nutrition | | Customer Reviews | 4.5 out of 5 stars 5,795 Reviews | | Diet Type | Vegetarian | | Diet type | Vegetarian | | Flavor | Chocolate Peanut Butter | | Flavour | Chocolate Peanut Butter | | Global Trade Identification Number | 00748927052572 | | Item Dimensions | 29.2 x 14 x 40.6 centimeters | | Item Weight | 12 Pounds | | Item weight | 12 Pounds | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer Part Number | 1056371 | | Material Type Free | Caffeine Free | | Material type free | Caffeine Free | | Model Number | 1056371 | | Number of Items | 1 | | UPC | 748927052572 | | Unit Count | 5443.1 Grams | | 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 ![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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Bon produit *by C***E on 17 March 2026* BIEN ### ⭐⭐⭐⭐⭐ IF YOU DONT CARE ABOUT CHEMICALS BUY THIS *by A***X on 2 January 2025* when I was younger I would pound a couple of these protein shakes before school. However now that I’m older I’ve been a lot more conscious of what I put in my body and I would never buy this product because of the long list of chemicals. Look, if you want to put on muscle FAST get it. However, don’t rely on bs products to keep your body up. We Americans tend to see FAST RESULTS and jump on any product. Read the ingredients NOT the calories (in general) Quality: pretty good 👍🏼 Taste: the peanut butter one is my favorite 9/10 The vanilla is HORRIBLE 1/10 The chocolate is decent 6/10 Dissolves/mixability: not the BEST but it get the job done. ! DIGESTION ! : everyone knows the drill. It’s a bit taxing on your stomach if you know what I mean Scoop size: humongous when I first saw the TWO scoops you need for the protein I was like yeaaa definitely splitting this jawn in to two protein shakes. Summary: don’t rely on weight gainers for ever, only if you need to put muscle FAST or have issue with weight and are really skinny. For moms looking to help their kids and make them feel more confident I think this is a great product. However, eat real food. My biggest advice. You can’t shortcut what nature intended. (I put on a great deal of muscle using this and really did help me bulk up) ### ⭐⭐⭐⭐⭐ Gut *by D***N on 7 August 2026* Ich habe dieses Produkt gekauft, weil ich an Gewicht zunehmen möchte, und mir ist nach genauerer Prüfung aufgefallen, dass es den geringsten Zuckergehalt hat. Das hat mich zum Kauf überzeugt. Was den Geschmack angeht: ausgezeichnet, wenn auch für meinen Geschmack vielleicht etwas zu süß. Die empfohlene Tagesmenge ist sehr groß. Aber wenn man sie in zwei Portionen aufteilt, dürfte es funktionieren. Ich habe mich entschieden, nur die Hälfte der Portion einzunehmen. Eine ganze Portion ist mir zu viel. Aber das ist eine persönliche Vorliebe. ## 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.co.za/products/632075850-serious-mass-weight-gainer-protein-powder-for-muscle-gain-added](https://www.desertcart.co.za/products/632075850-serious-mass-weight-gainer-protein-powder-for-muscle-gain-added) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-18*