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$$74.18 () Includes selected options. Includes initial monthly payment and selected options. Details
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FREE delivery Monday, March 4
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Optimum Nutrition Multivitamin Immune Support
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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)

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Chocolate Peanut Butter
12 Pound (Pack of 1)
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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

Frequently bought together

Optimum Nutrition Serious Mass, Weight Gainer Protein Powder for Muscle Gain, Added Immune Support, Chocolate Peanut Butter,
$74.18 ($0.39/Ounce)
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Optimum Nutrition Micronized Creatine Monohydrate Powder, Unflavored, Keto Friendly, 120 Servings (Packaging May Vary)
$37.63 ($1.78/Ounce)
Get it as soon as Monday, Mar 4
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HELIMIX 2.0 Vortex Blender Shaker Bottle Holds upto 28oz | No Blending Ball or Whisk | USA Made | Pre Workout Protein Drink C
$22.95
Get it as soon as Tuesday, Mar 5
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    Compact by Design (Certified by Amazon) products remove excess air and water, which reduces the carbon footprint of shipping and packaging.

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From the brand

Climate Pledge Friendly

Climate Pledge Friendly

Products with trusted sustainability certification(s). Learn more

Product Certification (1)

Compact by Design (Certified by Amazon)
Compact by Design (Certified by Amazon) products remove excess air and water, which reduces the carbon footprint of shipping and packaging.

Compact by Design is a new sustainability certification created by Amazon to identify products that, while they may not always look very different, have a more efficient design. With the removal of excess air and water, products require less packaging and become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.

Learn more about this certification

From the manufacturer

Optimum Nutrition's Serious Mass to help you get serious about your sizable ambitions

OPTIMUM NUTRITION SERIOUS MASS

OPTIMUM NUTRITION SERIOUS MASS GAINER PROTEIN POWDER

OPTIMUM NUTRITION SERIOUS MASS GAINER PROTEIN POWDER

Calories That Count

Serious weight gain goals require serious calories. For many aspiring to be bigger, a highly- active metabolism, weaker appetite and on-the-run lifestyle can make it a real challenge to get enough calories from food.

Supercharge Your Serious Mass

Using an electric blender, you can add nuts, fresh or frozen fruits and other calorie-contributing ingredient to enhance the weight gain and muscle recovery potential of Serious Mass.

Optimal Usage Occasions

Between meals, after weight training and before bed. With less than 5 grams of fat per serving, Serious Mass is the weight gain formula packed with calories that count during recovery.

You've got a lot to gain with ON's Serious Mass

OPTIMUM NUTRITION SERIOUS MASS GAINER PROTEIN HIGH CALORIE

SERIOUS MASS is the ultimate muscle building and weight gain formula

Serious Mass Gainer Powder makes the ideal post-workout and between meals shake for sizing up your goals. SERIOUS MASS provides you with the tools you need to support your weight gains goals. Per 2-scoops, you are getting:

  • 3 Grams of Creatine Monohydrate per Serving
  • 25 Vitamins & Essential Minerals
  • 250+ Grams of Carbohydrates per Serving to Help Fuel Workouts
  • 50 Grams of Protein per Serving to Help Build and Maintain Muscle
  • 1,200+ Calories

serious mass optimum nutrition on mass gainer powder optimum nutrition creatine monohydrate powder on optimum nutrition creatine caps on microironized optimum nutrition amino 2222 tabs post workout supplement optimum nutrition bcaa supplement
Serious Mass Gainer Protein Creatine Monohydrate Powder Creatine Monohydrate Capsules Amino 2222 Tablets BCAA 1000 Capsules
Suggested Use: Supports muscle building and weight gain goals Supports muscle building, strength and performance Supports muscle building, strength and performance Helps maintain muscle tissue with whey protein Supports endurance and recovery through BCAAs
What's Inside Per Serving: 50g of Protein, 3g Creatine Monohydrate 5 grams of 100% pure creatine monohydrate 2.5 grams of 100% pure creatine monohydrate 5.3g of amino acids, complete amino acid spectrum coverage 1,000mg of branch chained amino acids

Focus on sustainability

Compact by design from Climate pledge friendly. Certified by Amazon.

Small changes in product size & weight lead to lower carbon emissions.

We created Compact by Design to identify products that, while they may not always look very different, have a more efficient design. With the removal of excess air and water, products require less packaging and become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.

Here are a few of the many ways products can qualify:

Less packaging

Less air in container

More efficient shape

Waterless technology

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
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews: