Serious Mass
Optimum Nutrition

Serious Mass

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  (1,128 Reviews)

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

Overall Rating
8.5
1,128 Ratings
Verified Buyer Rating
8.6
436 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.
Aug 17, 2019
10
Verified Buyer
  • 10 Strawberry

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

Jul 13, 2019
10
 
  • 10 Chocolate

So, I was about 53kg and I started gym seriously in January 2019 and started taking this and within 3 months of taking and finishing the product, I gained 20kg.

Jul 12, 2019
10
 
  • 10 Vanilla

This stuff is a game changer. I went from making home made weight gain shakes using bananas peanut butter and nuts and being on the toilet for days while switching to this and really seeing results. I gained a lot of mass since taking this as well as eating more and I have to say this stuff is incredible. I really see a difference when I stop taking it as I become like a raisin but this keeps my shoulders broad and bulked up. Now the flavor isn’t great let’s be honest and the fact it froths up and you have to wait at least an hour for it to turn to liquid is a little annoying but honestly when your an extomorph and you need to gain weight you’ll deal with it cause this product does work. It’s even better when you add bananas and strawberries or even blueberries taste good with it. I try to drink this five days a week at least it’s my holy grail , and really has helped me a lot so thank you serious mass. I went from skinny and eating everything never seeing any results to actually gaining weight . From a skinny twig this is a game changer thank you!!!

Jul 03, 2019
10
 
  • 10 Banana

MUITO BOM PARA MASSA

Jun 20, 2019
4
Verified Buyer
  • 2 Chocolate

The chocolate taste is terrible! It’s the only reason for a low review.. we’ll see if the product helped in 5-6 weeks

Jun 18, 2019
8
Verified Buyer
  • 9 Chocolate
  • 7 Chocolate Peanut Butter
  • 2 Banana

Alright so the product itself is the best going around & if you workout 4-5x/week, taking 1-3 FULL servings/day (approx 3500 cals/day) from this Mass Gainer will get you SERIOUS MASS. I started with 140lbs & gained close to 30lbs in 2 months of heavy diet (whole foods) + this product. Now about the flavors: 1) Banana: stay away! This was my first flavor & had to ask for a return but they don't do returns out of the US so had to finish the bag somehow. Almost felt like throwing up after every serving. 2) Chocolate: BEST I've tried so far. It's not too sweet, not too thick & tastes very pleasant. Easy to finish the bag. 3) Chocolate Peanut Butter: Just fine. Wasn't as good as Chocolate but was nowhere as bad as Banana. If you like your chocolate drinks sweeter, go for this one as it is definitely sweeter than the regular Chocolate flavor.

Jun 13, 2019
10
Verified Buyer
  • 10 Chocolate Peanut Butter

Ordered this 3+ times so far and its great results if you're consistent with drinking it at least once a day. Drank it 2-3x a week and was still able to gain 5lb in 2months and i have fast metabolism too. Flavor is great, way better than any i've ever tasted and i've tried the vanilla and cookies and cream but still doesn't beat this. I mix it with soy milk cause i'm lactose tolerant. i'd for sure recommend putting in a few ice cubes to make it less thick

Jun 10, 2019
10
 
  • 10 Chocolate

Being 7 stone for a very long time struggling all my life with my weight because I have an overactive thyroid problem. Being 5ft 5 and the weight I was at I was allways asking my doctor about stuff to help me gain weight and they allways said there was nothing they could do. One day someone just say to me you look Ill & I just had enough. So I searched for products what could help me and I come across this product.. and all I can say after a month of having it. I have little tyres on my belly and I’ve never been so happy in my self I feel like I can do more in work I’m not as weak just all around brilliant product I’ve just finished my first bag I’m gonna recur it every month. Thankyou serious mass I love it I couldn’t rate it enough flavour is amazing but use a blender it’s just like a makkies shake.

May 22, 2019
10
Verified Buyer
  • 10 Vanilla

I just recently bought this and it is actually really good, I'm a skinny guy and I'm hoping this can get me some gains in the gym. I expected the vanilla to be nasty, but it is amazing, it kinda tastes like melted vanilla icecream !

May 08, 2019
9
Verified Buyer
  • 9 Banana

I ordered this product for after I had my tonsillectomy. With needed rest and the inability to eat solid foods while recovering, I anticipated I might lose weight. I used this product for a good 3 weeks after my surgery and it greatly helped me maintain my weight. I probably only lost about 2-5 pounds total (which is well below what most adults lose after a tonsillectomy) and I didn't notice a significant reduction in muscle, if any. Flavor was great and blended well in a blender. Of course, the texture/flavor was very slightly artificial. I really did enjoy the product though, and continuously looked forward to my smoothies during a difficult recovery. For people just looking to gain mass while still able to eat solid foods as well, this would be a great supplement, too. Would definitely order again!

Apr 30, 2019
1
Verified Buyer
  • 1 Strawberry

Ive been using this protein for a while, I usually get chocolate, but this time i followed the recommendations of another reviewer and got strawberry.... Terrible, terrible, terrible mistake. It tastes like nasty cough syrup. I drank a serving two hours ago and im still sick to my stomach. Every time I get up I feel like I have to throw up. I've never had this problem with the chocolate flavor, I am 100% going to return this and demand a refund/exchange. Please, please avoid strawberry by all means necessary.

Apr 17, 2019
10
Verified Buyer
  • 10 Strawberry

I've been using this product for several years now, and I LOVE IT!! don't know how the other flavors taste but, the Strawberry flavor is the BOMB!!! Baby!!

Mar 31, 2019
1
Verified Buyer
  • 1 Vanilla

Although this Mass Gainer mixes well, the taste is Absolutely horrible. I don't know if I got a bad bag but the powder taste chalky. I've tried with water, with milk, mixed with fruit but no good. I do not recommend this product at all.

Mar 18, 2019
9
Verified Buyer
  • 10 Vanilla
Mar 17, 2019
9
Verified Buyer
  • 9 Chocolate

I gained 3-4kg in the first month using this mass even though my body is really hard to gain weight. It is hard to consume the whole 1200 calories serving at once but you can divide it by half and take it separately. Indeed, I found this way is more efficient to me than take the whole serving at once. Btw, the chocolate flavor is pretty delicious for a weight gainer product, it's not too sweet!

2 Sizes
12 Lbs.
Choose a Size
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6 Flavors
Chocolate Peanut Butter
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Price: $55.99  ($3.50 / Serving)
Flavor Rating: 8.9

What's in Optimum Nutrition Serious Mass

Serving Size 2 Heaping Scoops (334 g)
Servings Per Container16
Amount Per Serving % Daily Value
Calories 1,270       
Calories From Fat 70       
Total Fat 7 g 11%*
Saturated Fat 4 g 20%*
Cholesterol 95 mg 32%
Total Carbohydrate 249 g 83%
Sugars 26 g
Protein 50 g 100%
Vitamin A 5,000 IU 100%
Vitamin C 60 mg 100%
Vitamin D 200 IU 50%
Vitamin E 30 IU 100%
Thiamin 4.8 mg 320%
Riboflavin 4 mg 235%
Niacin 50 mg 250%
Vitamin B6 5 mg 250%
Folic Acid 400 mcg 100%
Vitamin B12 10 mcg 167%
Biotin 300 mcg 100%
Pantothenic Acid 25 mg 250%
Calcium 600 mg 60%
Iron 8 mg 44%
Phosphorus 650 mg 65%
Iodine 175 mcg 117%
Magnesium 170 mg 43%
Zinc 18 mg 120%
Selenium 70 mcg 100%
Copper 1.2 mg 60%
Manganese 2 mg 100%
Chromium 200 mcg 167%
Molybdenum 75 mcg 100%
Sodium 700 mg 29%
Potassium 1,300 mg 37%
Creatine Monohydrate 1 g
L-Glutamine 500 mg
Glutamine Peptides 500 mg
Choline (As Choline Bitartrate)
Inositol 250 mg
PABA (Para-Aminobenzoic Acid) 5 mg
* Percent (DV) 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 Albumen, Sweet Dairy Whey), Cocoa (Processed with Alkali), 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 Tocopherol 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, Creamer (Sunflower Oil, Maltodextrin, Modified Food Starch, Dipotassium Phosphate, Tricalcium Phosphate, Tocopherols), Lecithin, Salt, Sucralose, Acesulfame Potassium
ALLERGEN INFORMATION: CONTAINS MILK, EGG, WHEAT (GLUTAMINE PEPTIDES) AND SOY (LECITHIN) INGREDIENTS.

Directions For Serious Mass:

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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