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Optimum Nutrition, Serious Mass, Protein Powder Supplement, Banana, 6 lb (2.72 kg)

Optimum Nutrition, Serious Mass, Protein Powder Supplement, Banana, 6 lb (2.72 kg)


Regular price $69.00 USD
Regular price $82.80 USD Sale price $69.00 USD
Sale Sold out
Tax and Shipping included for USA orders


  • High Protein Muscle Building & Weight Gain Formula*
  • 50 g Protein* - Helps Build and Maintain Muscle*
  • 1,250 Calories - Helps Boost Calorie Intake
  • 253 g Carbs - Helps Fuel Intense Workouts
  • Artificially Flavored
  • Strength Training
  • Supports Performance
  • Supports Weight Gain Goals*
  • Authentic Optimum Nutrition Product 
  • Informed Choice - We Test - You Trust 

Why Serious Mass™?

  • 50 grams of protein to support muscle building and recovery.**
  • 1,260 calories to supports calorie surplus for weight and muscle building*^
  • 253 grams of carbohydrate to support fueling of intense workouts and aid in replenishment of glycogen stores.^
  • 3 g of creatine monohydrate to support performance.*^
  • Naturally occurring glutamine 8 g, branched chain amino acids 11 g and essential amino acids 24 g 
  • Good source of 22 vitamins and minerals 
  • Vitamin C, E, and zinc help support a healthy immune system^
  • B vitamins help convert food to cellar energy^

Optimum Nutrition® has been trusted to provide the highest quality in post-workout recovery, pre-workout energy, and on-the-go sports nutrition for over 30 years and in 90+ countries. After careful supplier selection, each ingredient is tested to assure exceptional purity, potency and composition. We hold ourselves to the highest production standards, all so you can unlock your body's full potential.

Serious Mass™ is designed to provide serious calories, protein and carbohydrates - making this a convenient wat to get extra calories throughout the day. 

A global leader of weight gainers

SERIOUS weight gain requires SERIOUS calories. However, those who need the extra calories most often have the toughest time consuming enough of them. For many aspiring to be bigger, having a highly-active metabolism, weaker appetite or an on-the-run lifestyle can make it a real challenge to consume enough calories through whole foods alone. With SERIOUS MASS™, you've got nothing to lose and lots to gain. It's time to stop thinking small; get SERIOUS - SERIOUS MASS™.

*See supplement facts for sodium and cholesterol content

*When taken in addition to normal calorie intake and regular weight resistance training. 

Suggested use

  • 340 g - About 2 heaping scoops serious mass™ protein powder 
  • 24 fl oz - Cold water, milk or other beverage 
  • 30-45 seconds - Blend until dissolved 

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

Scale up your serious mass™

About 1 heaping scoop

  • 25 g protein
  • 630 calories 
  • 127 g carbs 

About 2 heaping scoops 

  • 50 g protein
  • 1,260 calories
  • 253 carbs 

For healthy adults, consume enough protein to meet your daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and exercise program. For best results, consume 2 scoop serving regularly over time in combination with regular resistance exercise.

Other ingredients

Maltodextrin, whey protein concentrate, natural and artificial flavor, sunflower and/or soy lecithin, malic acid, acesulfame potassium, sucralose, yellow 5.

Contains: Milk and soy. 


Store in a cool, dry place. 

Serving scoop included but may settle to the bottom during shipping. 

Contents sold by weight not volume. 

Some settling will occur. 


While strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided .

Supplement Facts
Serving Size: 340 g (About 2 Scoops)
Servings Per Container: 8
  Amount Per Serving
% Daily Value
Calories 1260  
Total Fat 5 g 6%*
Saturated Fat 3 g 15%*
Cholesterol 200 mg 63%
Total Carbohydrate 253 g 92%*
Total Sugars 31 g **
Includes 10 g Added Sugars
Protein 50 g 100%*
Vitamin C (as ascorbic acid) 60 mg 67%
Vitamin D (as cholecalciferol) 5 mcg 25%
Vitamin E (as d-alpha tocopheryl 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 DFE (400 mcg folic acid) 170%
Vitamin B12 (as cyanocobalamin) 10 mcg  417%
Biotin (as d-biotin) 300 mcg 1,000%
Pantothenic Acid (as d-calcium pantothenate) 25 mg 500%
Calcium (as calcium citrate, dicalcium phosphate) 550 mg 42%
Iron (as ferrous fumarate) 6 mg 33%
Phosphorus (as dicalcium phosphate, dipotassium phosphate) 500 mg 40%
Iodine (as potassium iodide) 52 mcg  35%
Magnesium (as magnesium aspartate) 125 mg 30%
Zinc (as zinc citrate) 15 mg 136%
Selenium (as selenomethionine) 70 mcg  127%
Copper (as copper gluconate) 1 mg 111%
Manganese (as manganese amino acid chelate) 2 mg 87%
Chromium (as chromium polynicotinate) 120 mcg 343%
Sodium 670 mg 29%
Potassium 1280 mg 27%
Creatine Monohydrate 3 g **
* Percent Daily Values are based on a 2,000 calorie diet.
** Daily Value not established.
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