Serious Mass Weight Gainer
Optimum Nutrition

Serious Mass Weight Gainer

Protein Powder Weight Gainer*
Loaded with 1,250 Calories, 50g of Protein, & 25 Vitamins and Minerals to Pack on Pounds*
8.5  out of 10  (1,148 Reviews)
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Product Overview

Two Optimum Nutrition bottles standing next to each other.
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WEIGHT GAIN

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MUSCLE BUILDING

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CARB PROTEIN BLEND

High-Calorie WeighT GAiner

  • 1,250 Calories per Serving
  • 50 Grams of Protein per Serving
  • 250+ Grams of Carbohydrates per Serving
Optimum Nutrition Micronizec creatine power bottle

Optimum nutrition true strength

True Strength is a journey. It never rests, it never quits. It's about overcoming obstacles, accomplishing goals, and recognizing achievements. And then it resets to achieve again. As your trusted sports nutrition partner in goal achievement, ON demonstrates that same passion while crafting our products. From the raw materials we source to our state-of-the-art manufacturing processes, no compromises are made. You set the bar higher after every workout, we set the bar higher to redefine the industry standards and ensure you realize optimum results.

Quality

Packing a very substantial 1,250 calories into every serving – even more when mixed with cold milk – Serious Mass is the ultimate weight gain formula. With 50 grams of muscle building protein, when used in conjunction with a healthy, balanced diet and regular weight training, this powdered mix provides you with serious weight gaining support for developing your physique to the fullest.

CONSISTENCY

Optimum Nutrition has been spotting the efforts of goal driven individuals since 1986. As one of the few companies to own and operate state-of-the-art manufacturing facilities that are GMP compliant and NSF Certified for Sport, ON assures that every shake will mix up effortlessly because the company started instantizing powdered products back in 2000. You also expect each shake to taste the same as the last and your next. That’s the kind of consistency ON delivers.

History & Heritage

Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world’s best-selling whey protein, ON’s Gold Standard 100% Casein introduced slow-digesting nighttime protein to the weight training world and Amino Energy created the anytime energy category in sports nutrition. When technology makes advancements possible, ON will be the company bringing it to you.

serious mass ideal usage occasions

Ratings & Reviews

Serious Mass Weight Gainer
Overall Rating
8.5
1,148 Ratings
Verified Buyer Rating
8.6
450 Ratings
Average Flavor Rating
8.0
7 Flavors
Top Rated Flavor
8.9
Chocolate Peanut Butter
By clicking the button above, you agree to entering the Bodybuilding.com Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
May 29, 2020
10
 
  • 10 Chocolate Peanut Butter

I am using these product from last 2 weeks while its amazing product. I recommend to everyone use this product

May 28, 2020
9
Verified Buyer
  • 10 Chocolate
  • 5 Vanilla

The Vanilla flavor is a little chalky once it comes to texture however, other than that once blended with the right mixtures, it"s flame! The Chocolate flavor is enjoyable. You DO get Results from this product as well, after a solid use of 3 months accompanied by intense work outs.

Apr 24, 2020
8
 
  • 10 Chocolate

Flavour is great, tastes like chocolate milk. Scoops are large I did half servings morning and afterworkout/evening.

Apr 22, 2020
8
Verified Buyer
  • 8 Chocolate Peanut Butter

I started at 162LBS (6'2') and after taking this twice a day (1 scoop each time) I'm weighing 170LBS. about to order again and planning to eat more as well. Heres how I did it-- one scoop, 16 ounces of whole milk, a 3 scoops of ice cream, .. sometimes I would throw a banana or a tablespoon of peanut butter but that always made it hard to get down.

Apr 17, 2020
10
Verified Buyer
  • 10 Chocolate Peanut Butter

This is gonna help so much for me and I'm so glad I finally got mine! Just had a curious questions my nutritional facts are the one from Vanilla (I think) but I got chocolate Peanutbutter, but its no biggie, they aren't much different from nutritional facts, but taste is obviously different, im for sure going to buy another bag of this! Totally recommend for people who can't put on weight or trying to bulk up!

Apr 17, 2020
10
Verified Buyer
  • 10 Vanilla

Ive been taking this product about two months..1 serving after my workout with cell tech creatine fruitpunch at 8am and the second serving around lunch time and i must say I've gain around 12 to 15lbs easy...but you have to put the work in...working out..and all i do is push ups and dips..so this product is the real deal!!..and i eat my 3 regular meals a day..breakfast..lunch and dinner...so if you want the gains..use this product and cell tech creatine fruitpunch flavor..it WORKKKS!!!

Mar 27, 2020
9
Verified Buyer
  • 9 Vanilla

I use a scoop of this (625 cal, 25g of protein) and a scoop of syntha-6 vanilla protein. I blend it, and it comes out to 825 cal, 47g of protein after my afternoon workout. The flavor that comes out of this is awesome, tastes great and is filling as heck. Serious mass alone flavor is great too, I've put on roughly 13 pounds in 3 months, a lot of muscle but some fat included. It's just what happens unless you are tracking your exact macros/etc which I don't. Happy with this product

Mar 24, 2020
9
 
  • 9 Chocolate Peanut Butter

Really good mass gainer which helped me get 15 pounds of weight. I really like the chocolate peanut butter flavour. I took 2 scoops of mass gainer twice a day and beleive me it has seriously good results.

Mar 16, 2020
10
Verified Buyer
  • 8 Chocolate

Great weight gainer- helped me put on 10kgs in just a few months. Doesnt mix particularly well, so I'd recommend a blender if possible. Choc Mint flavour has some poor reviews but I really like it (although it kinda grew on me- the first time I didn't like it that much). I split the portions into 2, as 1200 calories in a single hit is quite a lot. I have half a serving twice a day and have definitely reaped the rewards (especially coming from someone who struggles like hell to put on any weight). 10/10 would recommend.

Mar 10, 2020
10
Verified Buyer
  • 9 Chocolate Peanut Butter

Bomb *** flav

Feb 23, 2020
9
 
  • 10 Chocolate

I’m very sensitive to Proteins or Mass Gainers because of the ingredients and always get migraines leaving me sick for days while taking them. But ON products don’t do that to me. And being a hard gainer I need that few hundred to thousand extra calories in my diet, ya’ll know what I’m talking lol Taking this while on a solid diet and a solid work out routine has helped a lot to gain weight. It’s always going to be a struggle for a hard gainer even while taking a mass gainer but if you are consistent then it will pay off.

Feb 18, 2020
10
Verified Buyer
  • 9 Chocolate

Allright, im just the skeptic guy, who never try this kind of product, i just had mindset it is a scam... But... Im about 180cm tall and last 3years i had only 61kg (+/-0,5kg) I work as a mechanic, so its kind of job where you burn a lot of calories just doing it. I bought this Serious Mass Gainer, and im happy like never.... But its not only about this, i started to read and go through loads of tips on bodybuilding.com and i found out why i never gain any weight... So i start to eat proper food, not just quick snacks during the work hours... For last 2 weeks, for first time in my life a had EVERY day breakfast and morning snacks, WHOLE meal Lunch, WHOLE meal dinner and this gainer after light excercise in night... Results for ME are INCREDIBLE! After two weeks, i moved from 61,5kg to 63,7kg!!! Even now i feel better, more confident and full of energy thanks to healthy life style. Im not doing this to gain serious muscles, i just dont want to by the slim guy. So, if you willing to try this, go for it, but not only for this gainer alone... I wish you good luck on your way, its worth it. Massive thanks to Bodybuilding.com for usefull information that they are sharing!

Feb 14, 2020
9
Verified Buyer
  • 9 Banana

I’ve used chocolate for too long and the banana was a good change up! The guy below saying the banana is awful, not true. It pretty much tastes like banana laffy taffy! So if you like those, you like the banana. Other than that, it’s just calories to gain weight.

Dec 20, 2019
10
 
  • 10 Banana

it works! not much more to say!

Nov 23, 2019
9
Verified Buyer
  • 9 Chocolate

it tastes good

2 Sizes
6 Lbs.
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5 Flavors
Banana
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Price: $35.99  ($4.50 / Serving)
Flavor Rating: 7.9
Loaded with 1,250 Calories, 50g of Protein, & 25 Vitamins and Minerals to Pack on Pounds*

What's in Optimum Nutrition Serious Mass Weight Gainer

6 Lbs. Banana
Serving Size About 2 Heaping Scoops (336 g)
Servings Per Container8
Amount Per Serving In Water % Daily Value
Calories 1,250       
Total Fat 3.5 g 4%*
Saturated Fat 2 g 11%*
Cholesterol 105 mg 35%
Total Carbohydrate 254 g 92%*
Total Sugars 20 g **
Includes 10g Added Sugars 21%
Protein 50 g 100%*
Vitamin A (as beta-carotene) 940 mcg 104%
Vitamin C (as ascorbic acid) 60 mg 67%
Vitamin D (as cholecalciferol) 5 mcg 25%
Vitamin E (as d-alpha tocopherol succinate) 20 mg 133%
Thiamin (as thiamin mononitrate) 4.8 mg 400%
Riboflavin 4 mg 308%
Niacin (as niacinamide) 50 mg 313%
Vitamin B6 (as pyridoxine hydrochloride) 5 mg 294%
Folate (as folic acid) 680 mcg 170%
Vitamin B12 (as cyanocobalamin) 11 mcg 458%
Biotin (as d-biotin) 300 mcg 1,000%
Pantothenic Acid (as d-calcium pantothenate) 25.6 mg 511%
Choline (as choline bitartrate) 250 mg 45%
Calcium (as calcium citrate, dicalcium phosphate) 640 mg 49%
Iron (as ferrous fumarate) 6 mg 33%
Phosphorus (as dicalcium phosphate, dipotassium phosphate) 490 mg 39%
Iodine (as potassium iodide) 53 mcg 35%
Magnesium (as magnesium aspartate) 125 mg 30%
Zinc (as zinc citrate) 15 mg 136%
Selenium (as selenomethionine) 71 mcg 129%
Copper (as copper gluconate) 1 mg 111%
Manganese (as magnesium aspartate) 2 mg 87%
Chromium (as chromium polynicotinate) 120 mcg 343%
Molybdenum (as molybdenium amino acid chelate) 80 mcg 178%
Sodium 570 mg 25%
Potassium (as dipotassium phosphate) 890 mg 19%
Creatine Monohydrate 3 g **
L-Glutamine 500 mg **
Inositol 250 mg **
PABA (para-aminobenzoic acid) 5 mg **
* Percent Daily Values are based on a 2,000 calorie diet
** Daily Value not established
Other Ingredients:
Maltodextrin, Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Whites, Sweet Whey), Natural And Artificial Flavor, Medium Chain Triglycerides, Lecithin, Malic Acid, Acesulfame Potassium, Sucralose, Yellow 5.
CONTAINS: EGG, MILK, SOY.

Directions For Serious Mass Weight Gainer:

Add two heaping scoops of Serious Mass to a blender filled with 24 oz (710 mL) of  cold water, milk or other beverage. Blend for 30-45 seconds until dissolved.

TIPS: New users may find it beneficial to begin with 1/2 of a serving daily for the first week and then gradually increase to 1 serving a day.

Warnings: Store in a cool, dry place.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
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