--- product_id: 2576114 title: "Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate, 6LB" brand: "optimum nutrition" price: "$183.51" currency: USD in_stock: true reviews_count: 13 category: "Optimum Nutrition" url: https://www.desertcart.us/products/2576114-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-6lb store_origin: US region: United States of America --- # 250g+ carbs for energy 50g premium protein blend 1200+ calories/serving Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate, 6LB **Brand:** optimum nutrition **Price:** $183.51 **Availability:** ✅ In Stock ## Summary > 🏋️‍♂️ Bulk smarter, not harder with Serious Mass! ## Quick Answers - **What is this?** Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate, 6LB by optimum nutrition - **How much does it cost?** $183.51 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/2576114-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-6lb) ## 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 serving—because size waits for no one. - • **Endless Energy Boost:** 250+ grams of carbs to replenish glycogen and keep you crushing workouts all day. - • **Muscle Repair Master:** 50 grams of high-quality whey protein to accelerate recovery and build lean muscle. - • **Nutrient-Rich Formula:** 20+ essential vitamins & minerals including Vitamin C and Zinc for immune and overall health support. - • **Customizable Shake Builder:** Mix with milk, fruits, or nuts to tailor your calorie intake and taste—your gains, your rules. ## Overview Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories, 50g of premium whey protein, and 250g+ carbohydrates per serving. Enhanced with 20+ essential vitamins and minerals, it supports muscle growth, recovery, and immune health. Perfect for professionals committed to serious bulking and sustained energy, this customizable shake mix blends easily and fuels your gains with trusted quality from the world’s #1 sports nutrition brand. ## 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: Great product and price - Great taste, mixes easy and great price 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. ## Features - HIGH-CALORIE MASS GAINER FOR SIZE & STRENGTH:Delivers over 1,200 calories per 2-scoop serving to support weight gain, bulking phases, and increased daily energy intake when diet alone isn’t enough - 50G PREMIUM PROTEIN BLEND: Provides 50 grams of blended protein per serving to help support muscle repair, recovery, and lean mass development after intense training - HIGH-CARB ENERGY SUPPORT: Packed with over 250 grams of carbohydrates per serving to replenish glycogen stores, fuel workouts, and support sustained energy throughout the day - ADDED VITAMINS & MINERALS FOR DAILY NUTRITION: Includes 20+ essential vitamins and minerals, including Vitamin C and Zinc, to help support overall nutritional balance and immune system function - CUSTOMIZABLE, HIGH-CALORIE SHAKE BUILDER: Easily blend with milk, fruits, peanut butter, nuts, or other calorie-dense ingredients to further increase calories, improve taste, and tailor your weight-gain goals - Optimum Nutrition is the World's #1 Sports Nutrition Brand- Highest quality control measures so you feel comfortable and safe consuming the product ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0015R36SK | | Age Range Description | Adult | | Allergen Information | Milk, Soy | | Best Sellers Rank | #1,680 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #212 in Sales & Deals | | Brand | Optimum Nutrition | | Brand Name | Optimum Nutrition | | Customer Reviews | 4.5 out of 5 stars 34,640 Reviews | | Diet Type | Vegetarian | | Flavor | Chocolate | | Item Dimensions | 6.14 x 6.14 x 9.76 inches | | Item Weight | 0.9 kg | | Manufacturer | Glanbia Performance Nutrition | | Manufacturer Part Number | 1101537 | | Material Type Free | Caffeine Free | | Model Name | ON SERIOUS MASS CHOCOLATE 6LB | | Model Number | 1101537 | | 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 | 8 | | Supplement Formulation | Multi-Supplement | | Total Servings Per Container | 8 | | UPC | 748927022995 | | Unit Count | 96 Ounce | | Vitamins And Minerals | 0.9, 3.7, 30.0, 5.0, 700.0 milligrams, 410, 80 milligrams | ## Product Details - **Brand:** Optimum Nutrition - **Flavor:** Chocolate - **Item Weight:** 0.9 Kilograms - **Material Type Free:** Caffeine Free - **Servings per Container:** 8.0 ## Images ![Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Chocolate, 6LB - Image 1](https://m.media-amazon.com/images/I/71n54LdwKfL.jpg) ## Available Options This product comes in different **Size, Flavor** options. ## Questions & Answers **Q: How well does this work? I'm a teen with a high matabalizum and I'm looking to build mass and bulk up** A: I’m nearly 50 years old, but seeing this question I had to comment. Until I was around 32 or so, I couldn’t gain weight no matter how much I had to eat; or so it seemed. I remember not caring whether it was fat or ideally muscle, I just didn’t want to be skinny anymore. Then I hit a point in my life where the metabolism slowed and I couldn’t keep the weight off. That lasted for nearly 15 years and for some reason my appetite suddenly plummeted and now I’m back looking at weight gainers simply to do nothing more than maintain a healthy weight. Just try to keep in mind that human physiology typically prohibits putting on large amounts of muscle in a short period of time naturally. That means that a large portion of quick gains will be fat. Embrace your high metabolism and shoot for a reasonable goal. That said, the more calories you intake in a day that exceeds what your body can burn, the quicker you will gain weight. For the most part, it’s simple math. Total Intake - Total Burned = Energy Stored Primarily as Fat. There are about 3500 calories in one pound. If you were to forge an extra 3500 calories a day, you could theoretically gain 7 pounds a week. For someone like you, that probably means eating 8,000 calories a day. Now as far as this product goes, it’s one of the highest calorie per serving gainers I have seen and it’s much quicker to pound a shake than to eat a steak! Another thing to keep in mind is that supplements that are fortified with vitamins and minerals, have the potential to far exceed recommended safe values for human consumption. I ran into this when I was your age. I was drinking over a gallon of milk a day, milk is fortified with vitamin D and that build up led to some freaky painful headaches in me personally. Too much calcium can also upset your bodies homeostasis and lead to surprising problems. Being young, your body can handle a lot! Just wanted you to be aware of the things I wish I knew when I was your age. If I were young again I would focus on speed, agility and good clean ripped muscle! Shredded muscle always looks bigger than fat muscle. Cheers! **Q: banana** A: I’m adding my two cents. Chocolate peanut butter is the truth. Banana was good at first, and then it wasn’t. **Q: Does it work without work out ?because im so busy all day** A: First off, I am so sorry that everyone that responded to this question this far hasn't answered your question. I'm seeing you ask if this helps you put on weight without working out. I've seen 3 or 4 people put "no excuses, no short cuts," "no motivation, no nothing" and other meat head answers. I apologize about them =) Getting to your question. Yes, it does help you gain weight even if you're not working out. I understand you're busy...who's not? Working out and drinking this is without question the best way to gain weight. But, for the last 2 weeks I've been drinking a scoop in the morning, and a scoop at night before bed. And I've gained 3 pounds! Doesn't sound like a lot, but if I don't get 6 eggs every morning, I'll loose 2 pounds. If I don't eat 400 calories everyday, I'll loose 2 pounds. I have such a low fat to muscle ratio that if I type it in, people won't believe me, so ill save it for the haters on YouTube (jk) 😅 But yeah, this stuff works. Might jist be a pounds a week, but if you're like me, that's great success. This does work without working out as long as you drink it consistently. Best of luck to you my friend. **Q: will a high intensity sport like basketball plus weight training, 5 days a week lessen the effectiveness of this product??** A: The guy who says this causes cancer is lying or is just ignirant. Some other supplements may but even at that mant studies don't say which ones. Powder prorein supplements do not. As do many men, i don't use this product for muscle gain. I use max muscle for that. I use this for belly fat gaining. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product and price *by C***R on July 10, 2026* Great taste, mixes easy and great price ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ If your skinny and have trouble gaining this is for you *by J***E on September 29, 2013* Ok so I have been using this product for over a year now. I cycle it in bulking and cutting stages with a pre-workout (Cellucore C4 Extreme) and attempt to consume healthy food in addition to the product. I am an amateur with no professional experience, but this product has worked for me. I am a skinny guy with a very quick metabolism. I train for endurance and strength, NOT mass. If you are a skinny person who has trouble gaining weight I recommend giving this a shot. This is not for body builders who count calories and want to stay lean. Its a weight gainer! I am currently 5'10, 170 lbs. During this cycle I am training 3-4 days a week between 60-90 mins per workout. Like I said I train high endurance and strength, not heavy lifting. In the last 3 months I have gained 15 lbs and lowered my body fat percentage by 4%. I consider this a substantial achievement as I have never been able to put on weight unless I gain lots of fat. When I was cutting I used this as a meal replacement with low calorie intake and actually lost weight taking it! RATIO: The great thing about this product is you can tailor the servings to meet your needs. If you desire more calories and carbs, use more, if you start to notice your getting fat, use less. Start with 1/2 serving a day and increase as needed to reach your desired goals. I generally consume a 1/2 serving mixed with 4-6oz of fat free milk within 30 mins of working out in the morning. I then eat high protein foods throughout the day (Cottage cheese, Greek yogurt, oatmeal (rolled oats, not that instant crap), chicken breast, tuna, brown rice, etc). I try to eat as much clean food as I can throughout the day. I then have another 1/2 serving with milk in the afternoon. TASTE: This product tastes amazing. 1/2 serving mixed with milk comes out like a milkshake, not too thick, not too thin. If you go for the full serving it is very thick and heavy. Its hard to drink that much without throwing up. Split it up into 1/2 servings throughout the day. SIDE EFFECTS: I personally have major gas from this product. Its not horrible, but I have to leave the room throughout the day at work. I anticipate this and take breaks. No big deal. I have had normal bowel movements while taking this product, but I do consume high fiber oatmeal to assist with the digestion. I find myself dropping bricks if I do not consume enough fiber with this product, again, adjust the servings to fit your body needs. FINAL THOUGHTS: Overall I enjoy this product. If you use it as a meal supplement during your cutting stages you may notice you actually LOSE WIGHT while taking this product. I sure did. ## Frequently Bought Together - Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate, 6 Pound (Packaging May Vary) - Optimum Nutrition Micronized Creatine Monohydrate Powder, Unflavored, 60 Servings, 300 Grams (Packaging May Vary) - 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.us/products/2576114-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-6lb](https://www.desertcart.us/products/2576114-optimum-nutrition-serious-mass-weight-gainer-protein-powder-chocolate-6lb) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-23*