Serious Mass Weight Gainer
Optimum Nutrition

Serious Mass Weight Gainer

Protein Powder Weight Gainer*
Loaded with 1,250 Calories, 250g of Carbs, & 25 Vitamins and Minerals to Pack on Pounds*
8.5  out of 10  (1,142 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
  • No Sugar Added
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 operate state-of-the-art manufacturing facilities that are GMP compliant, ON assures that every shake will mix up effortlessly because of its first-to-market instantization process. 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
1,142 Ratings
Verified Buyer Rating
8.6
446 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.
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 Mint
  • 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

Nov 19, 2019
10
 

nice product <a href="#">serious mass</a>

Nov 13, 2019
9
Verified Buyer
  • 8 Vanilla
Nov 02, 2019
9
Verified Buyer
  • 7 Chocolate

Last year, I started going to the gym 3 days a week for lacrosse. I'm a teen, I've been growing quite a lot. Last year I was 5'7 at 115, So somewhat small, but once the year was over I was 6'0 at 125. I didn't really know how to gain weight fast enough to keep up with my height. This lead to me seeing very little progress in the gym and in my overall physique. I really hated getting called skinny and underperforming in the gym so I decided I needed to gain some weight. I started using this about a month ago, starting at 130lb, and now I'm 140. I didn't just use the shake alone though. My recipe is as follows: *16oz of milk *3-4 tablespoons of peanut butter *One cup of protein powder (half the overall serving size) *1 banana *and 3ish scoops of chocolate ice cream (I know it's not great but it tastes like sh*t without) -Overall calories for this is around 1700 and the protein is 62g I take two of these a day along with my normal diet so I'm taking in around 5000 calories a day. I'm also training 4 days a week with 1-2 days of cardio a week So if you're trying to bulk and are skinny, I would recommend

Sep 22, 2019
10
Verified Buyer

Very Good Product. I recommend it. I have a question though, the expiring date is DD/MM/YY or MM/DD/YY? Thank you in advance for your help

Sep 13, 2019
10
Verified Buyer
  • 10 Vanilla

Vanilla is the best flavor and it mixes well with water, milk or in smoothies. Definitely prefer this over the Optimum Pro Gainer.

Aug 17, 2019
10
Verified Buyer
  • 10 Strawberry

I’m happy with this product. Best food for my muscles 👍

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

What's in Optimum Nutrition Serious Mass Weight Gainer

6 Lbs. Banana
Supplement Facts
Serving Size2 HeapingScoops(334g)
Servings Per Container8
Amount Per Serving In Water % Daily Value
Calories 1250
Calories From Fat 35
Total Fat 4g 6%*
Saturated Fat 2.5g 13%*
Cholesterol 80mg 27%
Total Carbohydrate 254g 85%*
Sugars 21g
Protein 50g 100%*
Vitamin A 5000IU 100%
Vitamin C 60mg 100%
Vitamin D 200IU 50%
Vitamin E 30IU 100%
Thiamin 4.8mg 320%
Riboflavin 4mg 235%
Niacin 50mg 250%
Vitamin B6 5mg 250%
Folic Acid 400mcg 100%
Vitamin B12 10mcg 167%
Biotin 300mcg 100%
Pantothenic Acid 25mg 250%
Calcium 630mg 63%
Iron 5mg 28%
Phosphorus 460mg 46%
Iodine 150mcg 100%
Magnesium 140mg 35%
Zinc 15mg 100%
Selenium 70mcg 100%
Copper 1mg 50%
Manganese 2mg 100%
Chromium 120mcg 100%
Molybdenum 75mcg 100%
Sodium 430mg 18%
Potassium 940mg 27%
Creatine Monohydrate 1g
L-Glutamine 500mg
Glutamine Peptides 500mg
Choline (As Choline Bitartrate) 250mg
Inositol 250mg
PABA (Para-Aminobenzoic Acid) 5mg
* 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 Albumin, Sweet Dairy Whey), Natural And Artificial Flavors, Vitamin And Mineral Blend (DiPotassium Phosphate, Magnesium Aspartate, DiCalcium Phosphate, Calcium Citrate, Ascorbic Acid, Niacinamide, Zinc Citrate, Beta Carotene, D-Calcium Pantothenate, D-Alpha Tocopheryl Succinate, Selenomethionine, Copper Gluconate, Ferrous Fumarate, Manganese Amino Acid Chelate, Thiamin Mononitrate, Pyridoxine Hydrochloride, Riboflavin, Chromium Polynicotinate, Folic Acid, Biotin, Molybdenum Amino Acid Chelate, Cholecalciferol, Potassium Iodide, Cyanocobalamin), Medium Chain Triglycerides, Lecithin, Malic Acid, Acesulfame Potassium, Sucralose, FD&C Yellow #5.
Allergen Information: Contains Milk, Egg, Wheat (Glutamine Peptides) And Soy (Lecithin) Ingredients.

Directions For Serious Mass Weight Gainer:

Add two heaping scoops of Serious Mass to a blender filled with 24 oz (710 mL) of water. Blend for 45-60 seconds. Then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend for an additional 30-45 seconds.

Tips: Mixing two scoops of Serious Mass with 24 oz (710 mL) of nonfat or low fat milk instead of water will give you a thicker, creamier, higher-calorie shake. New users may find if beneficial to begin with 1/2 of a serving daily for the first week and then gradually increase to 1 or more full servings several times a day.

Serious Mass is a substantial weight-gain supplement that can be used to feed serious calorie needs in a variety of different ways.

Between Meals: Drink 1/2-1 serving of Serious Mass between meals to maintain positive nitrogen balance and support a high-calorie diet. Post-Workout: Begin drinking 1/2-1 serving of Serious Mass 30-45 minutes following exercise to support maximum recovery. Before Bed: Drink 1/2-1 serving of Serious Mass about 45-60 minutes before bed to provide nutrients to recovering muscle throughout the night.

Note: For best results use Serious Mass combined with intense weight training (3-5 times per week) and a sensible whole foods diet. Also, keep in mind that sufficient recovery between workouts impacts your ability to gain lean mass. Allowing at least 48 hours between workouts involving the same body parts is recommended.

Warnings: Keep out of reach of children. Do not take this product if you are pregnant or nursing a baby. Check with a qualified healthcare professional before using this product if you are under 18 years of age or if you have any known or suspected medical condition(s) including diabetes, hypoglycemia, and/or if you are taking any prescription or OTC medication(s).

* 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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