Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate, 6 Pound (Packaging May Vary)
$49.99
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Price: $53.99 - $49.99
(as of Nov 07, 2025 17:56:56 UTC – Details)
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
Is Discontinued By Manufacturer : Yes
Product Dimensions : 8.06 x 8.06 x 10.39 inches; 6 Pounds
Item model number : 1101537
Department : unisex-adult
Date First Available : May 7, 2005
Manufacturer : Glanbia Performance Nutrition
ASIN : B0015R36SK
Best Sellers Rank: #6,186 in Health & Household (See Top 100 in Health & Household) #5 in Sports Nutrition Weight Gainers #795 in Sales & Deals
Customer Reviews: 4.5 4.5 out of 5 stars 29,702 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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
10 reviews for Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Chocolate, 6 Pound (Packaging May Vary)
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$49.99
Aman –
Solid weight gainer – works great and tastes good!
I’ve been using Serious Mass for a few weeks now, and it’s been super helpful for adding extra calories to my day. I’ve always had a hard time gaining weight, and this makes it way easier to get in the calories and protein I need without feeling like I’m constantly eating.The chocolate flavor is actually really good—especially when you blend it with milk, peanut butter, or a banana. Just a heads-up, the serving size is huge (like, 2 giant scoops), so a blender is a must. Don’t even try mixing it with a shaker bottle.I also like that it includes creatine and some vitamins, which saves me from buying those separately.Only downside is it can feel a little heavy if you’re not used to big shakes, so I started with half a serving and worked my way up. But overall, it’s been awesome for helping me bulk up. I’m already seeing some gains.
Michael Gordon –
Mass Gainer- Michael’s Review
I’ve been using Optimum Nutrition’s Serious Mass Gainer for a few weeks now, and it’s been a great addition to my muscle-building routine. The price is very affordable for the amount of calories and protein you get, making it a solid value. The shipment arrived on time, and the product was in perfect condition. Each serving provides 1,250 calories (with milk) and 50 grams of protein, which has really helped me achieve a calorie surplus and gain muscle. The flavor is fantastic, especially the chocolate, and the texture is incredibly smooth—no clumps or graininess. It’s easy to mix, and I love that it feels like a hearty, satisfying meal replacement. While it can be a bit sweet for some, it’s not a dealbreaker for me. Overall, if you’re looking for an effective, affordable, and tasty mass gainer, Serious Mass is definitely worth trying.
Kindle Customer –
Great suppliment for weight gain and exercise stamina.
I love this supplement! It’s great for people who need extra weight and who exercise. Lots of vitamins, minerals… etc. This will be my 3rd time ordering this product. It also tastes really good. My favorite is chocolate when compared to vanilla. Recommended!!!
JT –
Almost perfect.
I review everything I buy. Especially what I’m putting into my body. Optimum Nutrition is a reputable company who really knows how to make a great product. I’m a hardgainer like most people who will be using this product. I use a few more supplements from Optimum Nutrition and this is by far my favorite. Besides Serious Mass, I also have Optimums Gold Standard Whey (Chocolate flavor) and Creatine. Let me start off by saying that the Whey’s flavor is horrible. I don’t understand why everyone raves about how good it tastes. Its distgusting. Serious Mass however does not dissapoint. If you feel the same way about the taste of other Optimum Nutrition supplements don’t worry, Serious Mass tastes awesome, mixes very well in a shaker bottle, and contains exactly what im looking for in a weight gainer shake.PRO’S+ Tastes great+ Loaded with calories+ Contains 3 different types of Protein. (Whey, Casein, and Egg Protein)+ Very affordable+ Easy on the stomach (Depending on the person this may be a problem if you follow the serving size. I’ll get into that below)Con’s- You may think getting a 12lb bag will last a long time. You couldn’t be more wrong. Serving size is 2 scoops per shake. ONE SCOOP IS EQUAL TO 1 CUP OF POWDER. THAT IS ABSOLUTELY MASSIVE. Following the directions would cause to you finish a 12lb bag in 3 days. This is ridiculous. Half the serving and add your own ingredients.- Somewhat high sugar. This product does not add any sugar* However that doesnt mean it doesnt have enough already. its not very high. But its similar to a soda.***Just to clarify for those that may not know this already. This shake is very filling. I expected this and it could be a good thing for some people but for someone who plans on taking this in conjunction with a meal, they may find it hard and feel very bloated after. Its recommended you eat normally and drink the shakes in between meals.I will be buying this product again and I would recommend it to those who want to try a great tasting weight gainer. You may need to experiment with your own add in ingredients like peanut butter or flaxseed oil to add more calories to makeup for the massive scoop size if you decide to half the serving size. All in all its a great product. I only wish they would have clarified how massive the serving size is a little more.
Placeholder –
Incredible product
Nice taste ain’t gonna lie 🩷🩷
Dang Quynh Tuan –
after drinking .I have acne on my face and back. The problem is that the sugar is also quite high. 31g is a problem for those who want to gain weight but high blood sugar
Lumina Vitae –
Big calorie boost and perfect for anyone trying to put on weight. The taste is good, mixes well, and it’s very filling. I’ve noticed real progress in training since adding this to my routine.
アマゾンカスタマー555 –
増量にはこれ。同じブランドの他のプロテインも使用していましたが筋肉を大きく作るにはやはりこの高カロリーバージョンですね混ざりづらいのでミキサーを使うといいですね。
Miteb Alsaleh –
I usually buy a chocolate flavor, so it’s the first time to taste a strawberry, And it was delicious
Sergio –
Puedo decir que sí funciona para lo que promete: ganar masa y peso rápidamente. Cada batido tiene muchísimas calorías (más de 1 200 si usas los dos cacitos completos), así que es ideal para quienes les cuesta subir de peso o tienen un metabolismo muy rápido como en mi caso, Se nota el aumento de energía y masa corporal en pocas semanas si lo combinas con entrenamiento.El sabor está bastante bien, aunque es algo dulce.Puede causar pesadez, gases o molestias digestivas si no estás acostumbrado o si lo tomas muy rápido.En fin, lo recomiendo si estás enfocado en ganar peso de forma rápida y no te importa tanto la limpieza de los ingredientes. En mi caso ha sido una buena ayuda para subir de peso de forma controlada. 👍