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🚀 Serious Gains Start Here: Bulk smarter, not harder!
Optimum Nutrition Serious Mass is a high-calorie weight gainer delivering over 1,200 calories, 50g of blended protein, and 249g+ carbohydrates per 2-scoop serving. Enhanced with 20+ vitamins and minerals including immune-supporting Vitamin C and Zinc, this banana-flavored formula is designed for serious muscle growth and weight gain. Perfect for post-workout recovery or between meals, it offers versatile mixing options to customize your calorie intake and accelerate your mass-building journey.






















| ASIN | B0015R18SU |
| Age Range Description | Adult |
| Allergen Information | Milk, Soy |
| Best Sellers Rank | #2,320 in Health & Household ( See Top 100 in Health & Household ) #2 in Sports Nutrition Weight Gainers #282 in Sales & Deals |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Customer Reviews | 4.4 out of 5 stars 7,493 Reviews |
| Diet Type | Vegetarian |
| Flavor | Banana |
| Global Trade Identification Number | 00748927028867 |
| Item Dimensions | 15.35 x 11.42 x 5.51 inches |
| Item Weight | 2.72 Kilograms |
| Manufacturer | Glanbia Performance Nutrition |
| Manufacturer Part Number | 1031913 |
| Material Type Free | Caffeine Free |
| Model Name | ON SERIOUS MASS BANANA 6LB |
| Model Number | 1031913 |
| Net Content Volume | 11.91 Liters |
| Number of Items | 1 |
| Package Type Name | Tub |
| Product Benefits | Immune Support, Muscle Growth, Weight Gain |
| Protein | 50 Grams |
| 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 |
| Unit Count | 2730 Grams |
| Vitamins And Minerals | 0.9, 3, 30, 5, 700 Milligrams |
E**N
Good
Pretty good and the banana flavor taste good too.
P**H
Gained 7 lbs in One Month
I am a 19 year old male going on 20 and am trying to gain weight and get stronger because I plan on joining the Marine Corps within a year. I started working out between 3-5 times a week doing squats, barbell curls, and benching among other things. I bought a bag of the banana flavored weight gain powder and drink it every time I work out and sometimes on off days. I use blend one scoop of the powder with 2 cups of milk and a banana. It comes to around 1000-1200 calories per drink. After only a month I had gained 7 lbs. and drastically increased my strength. I feel great and think that I look great too. My goal is to gain twenty pounds, I started out at 145 lbs and now weigh 152. My goal is to get to 165 lbs. The stuff is a chore to drink but that's how every work out powder is. I just ordered my second bag, this time I am trying the Chocolate Peanut Butter! Update to review (Forgive me for repetition or discrepancies between reviews) I have seen real results using this weight gain powder. I am training to be a Marine and I initially did not weigh enough. I am 6’2 and weighed 145 lbs. when I started working out and making these shakes. 148 lbs. is the minimum weight for my height. I set a goal to gain twenty lbs. and I reached 160 lbs. after three months. I stopped working out and drinking shakes for a while and I returned to my initial weight. I then started working out and with the shakes was able to get my weight back to 160 after about a month. I do all kinds of different workouts: running, rucking, I have back/leg day, and a chest/arm day. Core everyday and I try to workout 5 days a week, all very high intensity. I try to eat three meals a day, I’m not the healthiest eater in the world but calories are what matter when you are doing this kind of training. The MARSOC app says this blatantly, “Ideally you should eat healthy but eat anything and everything you can to get as many calories as possible. Big Macs are my best friend, each one is 500 calories. After every workout I drink a shake, what I do is I blend two cups of whole milk with one level scoop of powder, a banana, and recently I’ve started adding a teaspoon of Creatine to the shake. It ends up being about 1,200-1400 calories. I try to get between 500-1200 calories per meal. Add the shakes calories to the calories from breakfast, lunch, and dinner and you could be getting upwards of 3,000 calories in a day which is what is necessary for me to gain one lb. a week.
J**S
Great taste great outcome you can't go wrong.
Love this product. Flavor is great. The effects really so work and taste is amazing. No clumps with just a regular shaker bottle. Seems to give a great boost of energy with all the vitamins and protein to go with it. Highly recommend this brand over other protein mixes so far.
J**T
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.
A**Z
Serious Mass rich in protein and vitamins that your body needs
I am very thin and I started taking this protein in smoothies and I have been able to notice the change in me apart from having a delicious flavor it has all the vitamins and probiotics I need at the same time it whets the appetite I love it I suggest them to all those who need to gain body mass
A**W
Expensive
8 servings per container (16 "heaping scoops") for $56. Do with that information what you will..taste is okay.
T**T
Weight Gain
Love this!!!! Bought it 3 1/2 weeks ago and I was 89 lbs I'm now at 103. I need more it's almost gone. For the first week I started with 1 scoop With milk. By week 2 I was doing 2 scoops. I'm going to have to push it up to 2 1/2 scoops per day when I get my next batch. I want to gain 25 more pounds. I am a female. It also made my chest bigger This will work great if your trying to gain weight!!!!! Worth every penny.
A**Y
Use to stay in 160lb with being extremely active
works great. This is already my 13th bag. I'll use it to keep my weight. The same since i'm extremely active and always doing a lot of manual labor this stuff helps out with my meals.
S**M
Great taste
I’ve used this product on and off over several years. It really is good not full of garbage like you can find in other products of a similar nature. It’s a very well trusted brand vanilla or banana is my favorite as they both taste really good. You can probably use half of the recommended serving each time and still get great results. Just stick to a really good eating plan and you’ll feel the benefits of this.
C**E
Bon produit
BIEN
N**L
Ganas peso
Te ayuda a ganar algo de peso.y el sabor está rikosimo
K**2
Wirklich mächtige Portion !!!
Also ich habe immer nur eine halbe Portion getrunken sozusagen. Zwei scoops waren für mich und meine Zwecke viel zu viel gleich am Morgen 😅 Aber sonst nichts auszusetzen, schmeckt und tut was es soll
K**A
Hervorragendes Proteinpulver für Masseaufbau
Ich bin sehr zufrieden mit dem Optimum Nutrition Serious Mass hochkalorischen Proteinpulver. Ich benutze es immer wieder und habe festgestellt, dass es mir am besten hilft, meine Masseaufbauziele zu erreichen. Ich habe auch andere Marken ausprobiert, aber keine hatte den gleichen Effekt wie Optimum Nutrition. Der Geschmack ist angenehm und es lässt sich gut mischen. Insgesamt ein großartiges Produkt für alle, die ernsthaft Masse aufbauen möchten.
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