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Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)

4.5 4.5 out of 5 stars 25,296 ratings

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Chocolate Peanut Butter
12 Pound (Pack of 1)

Purchase options and add-ons

Brand Optimum Nutrition
Flavor Chocolate Peanut Butter
Servings per Container 16
Item Weight 12 Pounds
Diet Type Gluten Free

About this item

  • High calorie weight gainer: more than 1,200 calories per 2-scoop serving
  • 50 grams of blended protein per serving
  • Over 250 of carbohydrates per serving
  • 22 vitamins and minerals including Vitamin C, Vitamin D, 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

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From the brand


From the manufacturer

High Protein and Weight Gainer Powder

Optimum Nutrition Serious Mass


The Gold Standard of Quality

  • Over 1,200 calories per serving
  • Over 250 grams of carbohydrates & 50 grams of protein per serving
  • 3 grams of Creatine Monohydrate per serving
  • Informed Choice & Banned Substance Tested

Stack your gains across Optimum Nutrition:

OPTIMUM NUTRITION SERIOUS MASS GAINER PROTEIN HIGH CALORIE

SERIOUS MASS PROTEIN

creatine powder for muscle gains, optimum nutrition, creatine

CREATINE MONOHYDRATE

optimum nutrition gold standard whey protein powder, on, gsw, cinnamon roll

100% WHEY PROTEIN POWDER

PREWORKOUT, PRE WORKOUT, OPTIMUM NUTRITION, ON, PWO, PRE, WORKOUT CAFFIENE

GOLD STANDARD PRE WORKOUT

MIXED BERRY AMINO ENERGY SPARKLING, ON, AES, ENERGY DRINK, BERRY BURST

ENERGY + HYDRATION DRINK

AMINO ENERGY POWDER, CITRUS SPRITZ, ON, OPTIMUM NUTRITION ENERGY POWDER, PREWORKOUT, AEP

AMINO ENERGY POWDER

Customer Reviews
4.5 out of 5 stars
25,296
4.6 out of 5 stars
67,571
4.7 out of 5 stars
203,974
4.4 out of 5 stars
43,363
4.3 out of 5 stars
48
4.5 out of 5 stars
16
OPTIMUM BENEFIT
Mass gainer protein powder Support muscle building Helps build & maintain muscle Pumps, energy & performance On-the-go energy drink Anytime energy - new flavor
PRIMARY SUPPLEMENT
High calorie & performance Micronized creatine powder 100% Whey protein powder Preworkout powder Caffeine with added hydration Energy powder with hydration
USAGE
Before or after your workout Supplement with your protein Before or after your workout 20 minutes before your workout Anytime energy Anytime energy
Gluten Free
Stackable with ON products?

Optimum Nutrition's Athlete Spotlight

optimum nutrition, on, gsw, creatine powder, creatine monohydrate, muscle growth supplement

Cameron Brink- Stanford Women's Basketball Player

Cameron Brink is a student-athlete at Stanford University, entering her senior year as the face of the Cardinal women’s basketball team.

Cameron's advice: "Remember to find something you love and have fun! It’s critical to then eat well – nutrition plays such a critical role in anything you do."

gold standard whey, optimum nutrition, on, gsw

Taylor Fritz - Tennis Player

How do ON’s products help Taylor dig deeper and reach his nutrition & performance goals?

Whether it’s after a gym session, while traveling or after a match, Taylor trusts Optimum Nutrition products to provide him with the high-quality protein he needs to support performance and recover at his best

Reach your protein potential with Optimum Nutrition's SERIOUS MASS Gainer

For Muscle Building & Weight Gain Goals

Serious Mass has the calories, carbohydrates and protein to respectively help boost caloric intake, fuel your workouts and help boost & maintain muscle in conjunction with a healthy, balanced diet and regular weight training.

Product Description

More calories. More protein. More carbs. SERIOUS MASS by Optimum Nutrition serves up 1,260 calories, 50g of blended protein, and over 250g of carbohydrates per 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. Calories per gram: Fat 9, Carbohydrate 4, Protein 4.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 11.5 x 5.5 x 16 inches; 12 Pounds
  • Item model number ‏ : ‎ 1056371
  • Date First Available ‏ : ‎ December 18, 2013
  • Manufacturer ‏ : ‎ Glanbia Performance Nutrition
  • ASIN ‏ : ‎ B00OV0VYHI
  • Customer Reviews:
    4.5 4.5 out of 5 stars 25,296 ratings

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Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)
Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter, 12 Pound (Packaging May Vary)
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Price-8% $76.96
List:$83.99
$79.99$89.99$69.99-8% $21.20
List:$22.98
$84.99
Price Per Unit$0.40 / Ounce$0.45 / Ounce$0.37 / Ounce$0.55 / Ounce$0.74 / Ounce$1.06 / Ounce
Delivery
Get it as soon as Tuesday, Apr 2
Get it Apr 5 - 8
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it Apr 5 - 9
Customer Ratings
Ingredient quality
4.1
4.4
4.2
5.0
4.0
4.4
Flavor
4.1
4.2
4.1
4.6
4.1
4.1
Value for money
4.0
4.2
4.3
4.3
4.2
4.3
Sold By
Amazon.com
Ultimate Nutrition, Inc.
Ronnie Coleman Signature Series
Naked Nutrition Inc
Amazon.com
My Nutrition Depot™
flavor
Chocolate Peanut Butter
Cookie 'n Cream
Cookies & Cream
Chocolate Peanut Butter
Chocolate
Chocolate
protein source
whey
casein, whey
whey
whey, casein
whey
blend, whey
weight
12 pounds
11 pounds
6700 grams
8 pounds
1.78 pounds
0.2 kilograms
target gender
unisex
unisex
unisex
unisex
unisex
unisex
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 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, Creamer (Sunflower Oil, Maltodextrin, Modified Food Starch, Dipotassium Phosphate, Tricalcium Phosphate, Tocopherols), Lecithin, Salt, Sucralose, and Acesulfame Potassium.
Whey Protein Concentrate, Whey Protein Isolate, Milk Protein Isolate, Hydrolyzed Whey Protein, Egg Protein Isolate, Micellar Casein, Milk Protein Concentrate, Calcium Caseinate, Corn Maltodextrin, Rice Maltodextrin, Canola Oil, MCT, Omega 3 Fish Oil, CLA, L-Glutamine, L-Alanyl-L-Glutamine, Protease, Lactase, Natural and Artificial Flavors, Sucralose, Acesulfame Potassium, Soy Lecithin
Organic Tapioca Maltodextrin, Naked Protein Blend (Peanut Flour, Whey Protein Concentrate and Micellar Casein), Organic Coconut Sugar, Organic Cacao, Alkalized Cocoa, Sea Salt. CONTAINS: Peanuts, Milk, and Tree Nuts (Coconut)
Super whey protein blend, cocoa, maltodextrin, lecitin, natural flavor, salt, cellulose gum, ascorbic acid, acesulfame potassium, sucralose, zinc oxide, vitamin D3

Important information

Safety Information

This product is labelled to United States standards and may differ from similar products sold elsewhere in its ingredients, labeling and allergen warnings

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 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, Creamer (Sunflower Oil, Maltodextrin, Modified Food Starch, Dipotassium Phosphate, Tricalcium Phosphate, Tocopherols), Lecithin, Salt, Sucralose, and Acesulfame Potassium.

Directions

Mix 2 scoops of the powder into 24 fluid ounces of cold water or milk using an electric blender. Use as a post-workout recovery tool, as part of a complete meal, or in your daily snack routine to raise caloric intake. Want to add even more calories to your shake? Mix in fruits, berries, nuts, peanut butter, and other calorie-contributing foods before blending. TIP: New users should start with a 1-scoop half serving. Use post-workout and/or between meals to add calories, carbs, and protein to your healthy, balanced diet.

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Looking for specific info?

Customer reviews

4.5 out of 5 stars
4.5 out of 5
25,296 global ratings

Customers say

Customers like the value, quality and taste of the protein powder. They mention that it helps them exceed their calorie requirements, is low in fat and has a lot less carbs. Some appreciate the weight gain. Opinions are mixed on the protein content, ease of mixing, and filling.

AI-generated from the text of customer reviews

703 customers mention528 positive175 negative

Customers like the taste of the health personal care product. They say it tastes good, has a chocolate flavor, and smells like strawberry marshmallows. Some say it's easy to take and mixes well.

"...Vanilla and chocolate tastes just fine, even better with a scoop of peanut butter...." Read more

"...Not bad though, didn't have any digestion issues with it, tastes good, doesn't cause gas like some, it does fill you up though, maybe its how I use..." Read more

"What they tell you. It tastes great and is a good supplement to build mass.What they don't tell you...." Read more

"...this will give you the best consistency.This stuff tastes like cake mix and can be hard to drink( just kinda thick) If you use water it will..." Read more

383 customers mention333 positive50 negative

Customers like the quality of the product. For example, they mention it works great, is pretty useful, and carries a ton of vitamins and minerals. That said, some say the quality is fine.

"...Well i can tell you this stuff works great I noticed a huge difference in my hunger levels and in the..." Read more

"Good product" Read more

"Amazing product. Was able to gain 15 pounds in 20 days with regular meals (3) a day and a consistent exercise regime...." Read more

"...As you’ll see from my pictures it also carries a ton of vitamins & minerals one should have on a daily basis. The ingredient quality is wonderful...." Read more

200 customers mention145 positive55 negative

Customers like the value of the product. They say it's a very low-cost food source, and an inexpensive option for weight gain and muscle development. They also mention that it has 2 scoops per 24FL oz, making it a great size for the price.

"...You save a lot of money also since the whey one has more servings.Last advice, use MyFitnessPal app if you have trouble gaining weight...." Read more

"...You save a lot of money also since the whey one has more servings.Last advice, use MyFitnessPal app if you have trouble gaining weight...." Read more

"...It tastes pretty good, a little high on price, don't get a bunch since you have to use two huge scoops compared to other products...." Read more

"...If you are unsure, give it a go. So much value to gain, and not so expensive for what you get" Read more

153 customers mention129 positive24 negative

Customers like the weight gain of the product. They mention it helps with weight gain, stabilizes metabolism, and makes a difference in maintaining their weight. Some say that the product is extremely beneficial in gaining muscle. Overall, most are happy with their purchase and recommend it to others.

"...Using this product sparingly even has greatly increaseed my results and weight gain i am very happy.Now a few tips.( i have bought 5 bags)..." Read more

"...It helps me both drink more water as well as add more calory points, but doesn't leave me feeling completely bloated and uncomfortable like I do..." Read more

"What they tell you. It tastes great and is a good supplement to build mass.What they don't tell you...." Read more

"...This product has kept my weight up during a difficult holiday season and I’m so grateful to have found it...." Read more

100 customers mention100 positive0 negative

Customers like the calories in the product. They mention that it helps them exceed their calorie requirements, is low in fat, and doesn't feel bloated at all. They also appreciate the selection of flavors and the fact that it has 200g of carbs. Overall, customers are happy with the product's calorie content and recommend it to others.

"...Well i can tell you this stuff works great I noticed a huge difference in my hunger levels and in the amount of muscle I was gaining and weight...." Read more

"...Much cheaper per serving, a better selection of flavors, and a lot less carbs...." Read more

"...and sometimes a chocolate donut all in the mixer, turns out very thick but calorie packed." Read more

"...Much cheaper per serving, a better selection of flavors, and a lot less carbs...." Read more

118 customers mention50 positive68 negative

Customers are mixed about the filling of the product. Some mention that it fills them between and after meals, and helps increase their appetite. However, others say that it makes them bloated, nauseous, and sick.

"...Only problem, I found out the whey protein is causing me to break out across my chest...." Read more

"...Banana. very sweet but light and good for morning.Strawberry. mix of both (i got tired of it tho)Mixing:..." Read more

"...with that^, know that 1 serving size ( aka 2 scoops) is EXTREMELY filling. I guess it makes sense knowing it’s ~1200 calories...." Read more

"...not only have I seen gains in muscles but it also helps give you more energy during the days when taken regularly and doesnt have a crash like with..." Read more

114 customers mention74 positive40 negative

Customers are mixed about the ease of mixing. Some mention that it mixes well, and absorbs quickly to start. They say it blends nicely, and is tolerable. However, others say that it doesn't mix well by hand, and must be mixed in a blender.

"...For me, this blends up perfect without being gritty or chalky...." Read more

"...make sure to blend it up well, it’s not practical to mix by hand. Usually with stressful times, I lose a lot of weight...." Read more

"its smooth no chucks down like chocolate milk i will hopefully see results...." Read more

"...I've never tasted it myself, but it smells quite good and blends nicely (and mom can be picky!) Thanks Serious Mass!..." Read more

111 customers mention59 positive52 negative

Customers are mixed about the protein content. Some mention it's low in fat, high in protein and nutrients, and a great option for people. They also say the nutritional aspects were fair. However, others say that it'd be easier to eat five meals a day. They say the product is half full of protein and not 100% whey.

"...Great protein mix, but I sometimes I feel like it would be easier to eat 5 chicken breasts too reach the same calorie goal, than to put down 48..." Read more

"tastes good but will make you bloated" Read more

"...maintenance and the additional vitamins and minerals are a great source for supplements...." Read more

"...He did gain a few pounds but too much sugar to be healthy and you have to use so much to get results." Read more

What They Don't Tell You
3 Stars
What They Don't Tell You
What they tell you. It tastes great and is a good supplement to build mass.What they don't tell you. Each serving consist of 2 huge heaping scoops of powder and 24 ounces of fluid (water or milk). This combination results in 48 ounces of liquid delight that they claim is a single serving. On what planet is 48 ounces a single serving? To put this in perspective, that is 2 full to the brim Shaker bottles that are intended to be consumed as one serving. 340 grams of powder from one serving translates into 3/4 of a pound of powder. Again to put this into perspective, the huge tub of powder you will recieve equals ONLY 8 advertised servings.The other thing they don't tell you is the powder is so fine and gummy that the only way to prepare the drink is to use a full sized blender. No Shaker bottles here. Preparing this mix is a mess. The powder is so fine that it creates a gummy mess that adheres to the side of the blender like Venom on Eddie Brock. Prepare to spend a significant amount of time coaxing the paste free to get it to properly mix.Great protein mix, but I sometimes I feel like it would be easier to eat 5 chicken breasts too reach the same calorie goal, than to put down 48 ounces. I realize that it can be broken up throughout the day, but so can multiple meals. There is also the option of using another protein supplement with a realistic serving size, multiple times a day. In the end, I feel like that is all they have done with this product. They have combined a multiple dose, throughout the day protein powder into a single serving, trying to advertise it as a solution that they obviously have not solved.
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Top reviews from the United States

Reviewed in the United States on May 10, 2020
Flavor Name: StrawberrySize: 12 Pound (Pack of 1)Verified Purchase
Customer image
5.0 out of 5 stars Works Great but...
Reviewed in the United States on May 10, 2020
6'2 150 pounds unhappy with my body wanting to gain body weight, muscle and strength 12/5/19

I did and to this day eat 6 meals a day: breakfast, snack, lunch, snack, supper, snack. then bed. this in the past was not even enough to gain the kind of weight, and muscle i was looking for. and believe me i was not skimpy on servings. And researched my diet extensively...i am not going to bore you with the normal Eggs oatmeal rice nut (haha) green stuff...extra..
But as any extreme diet program that i had cooked up for myself the endless Cooking, packaging, taking food to work eating every 10min break and obviously lunch time began to get exhaustive and i found myself cheating or just skiping eating "sessions" which gets expensive and is annoying and discouraging... also eating and trying to gain weight when you are under weight is hard! just eating enough is a mental battle in itself.
I ordered my first bag of Serious Mass in January 2020 i initially daunted by the huge doses required i decided take half sevings (one scoop) and to stick with my regular eating habits but integrate the Serious Mass into between meals. i also slightly dial back the amount I was eating for snacks. (like a handful of almonds or some peanut butter) Well i can tell you this stuff works great I noticed a huge difference in my hunger levels and in the amount of muscle I was gaining and weight.
4/9/20 as of today i weigh 190lbs and am still lean. great product. i take only half scoops whole is to much for me.
My meal plan now: Breakfast, Serious Mass, Snack, Lunch, Snack, (Workout after work) Supper, Serious Mass, Snack, (Bed)
Using this product sparingly even has greatly increaseed my results and weight gain i am very happy.
Now a few tips.( i have bought 5 bags)
Flavors: Chocolate. heavy not good for morningsbut good.
Banana. very sweet but light and good for morning.
Strawberry. mix of both (i got tired of it tho)
Mixing:
Do yourself a favor and get a 32 oz + shaker cup two heaping scoops is one serving will almost not fit in a 32 oz shaker cup dry! so take it in half servings and space it out.
Also do not put the Shaker ball in first it will be a dough ball. put your Serious Mass in your shaker cup add milk or water shake it up. there will be some clumps so then add the shaker ball in and shake again. this will give you the best consistency.
This stuff tastes like cake mix and can be hard to drink( just kinda thick) If you use water it will make it so much easier to drink after working out especially. (In the picture is 2 scoops on a small plate to give you an idea of the amount)
Over all great product! VERY happy with it!
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144 people found this helpful
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Reviewed in the United States on July 31, 2013
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
38 people found this helpful
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Reviewed in the United States on January 6, 2024
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
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Reviewed in the United States on February 13, 2024
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
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Reviewed in the United States on March 16, 2024
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
Reviewed in the United States on March 7, 2024
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase

Top reviews from other countries

Translate all reviews to English
Awane
5.0 out of 5 stars Mon frère ne jure que par ça
Reviewed in France on January 1, 2024
Flavor Name: StrawberrySize: 12 Pound (Pack of 1)Verified Purchase
Sergio
5.0 out of 5 stars Ganador de Masa Muscular
Reviewed in Spain on November 28, 2023
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
6 people found this helpful
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5.0 out of 5 stars 総評めちゃくちゃいい
Reviewed in Japan on February 8, 2024
Flavor Name: ChocolateSize: 8 Servings (Pack of 1)Verified Purchase
2 people found this helpful
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thanchetyeume
5.0 out of 5 stars good
Reviewed in Japan on October 11, 2021
Flavor Name: Chocolate Peanut ButterSize: 12 Pound (Pack of 1)Verified Purchase
Văn Huy
1.0 out of 5 stars it's really hard to drink
Reviewed in Japan on April 1, 2021
Flavor Name: StrawberrySize: 12 Pound (Pack of 1)Verified Purchase
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Văn Huy
1.0 out of 5 stars it's really hard to drink
Reviewed in Japan on April 1, 2021
it's really hard to drink , I bought it and left it unused🥺
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Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.