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Optimum Nutrition Serious Mass 6LBSOptimum Nutrition Serious Mass 6LBS
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Optimum Nutrition Serious Mass 6LBS

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Availability: In stock

Regular Price: $51.99

Special Price $29.99

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Serious weight gain requires serious calories. Ironically, those who need the extra calories most often have the toughest time consuming enough of them. For many aspiring to be bigger, highly active metabolisms, weaker appetites, and on-the-run lifestyles make consuming sufficient calories through whole foods alone a real challenge. With Optimum Nutrition Serious Mass, you've got nothing to lose and lots to gain. ON has consolidated over 1,250 calories, 50 grams of protein, over 250 grams of carbohydrates, and 25 vitamins and minerals, with added glutamine and creatine in every serving. It's time to stop thinking small; get Serious Mass.

Supplement Facts

Container Size: 6 Lbs.
Serving Size: 2 Heaping Scoops (334g) 
Servings Per Container: 8

Amount Per Serving:

Calories 1250 
Calories from Fat 40 
Total Fat 4.5 g 7% 
Saturated Fat 3 g 15% 
Cholesterol 75 mg 25% 
Total Carbohydrate 252 g 84% 
Sugars 40 g 
Protein 50 g 100% 

Vitamin C 60 mg 100% 
Vitamin D 200 I.U. 50% 
Vitamin E 30 I.U. 100% 
Thiamin 5 mg 330% 
Riboflavin 5 mg 290% 
Niacin 50 mg 250% 
Vitamin B6 5 mg 250% 
Folic Acid 400 mcg 100% 
Vitamin B12 20 mcg 330% 
Biotin 300 mcg 100% 
Pantothenic Acid 100 mg 1000% 
Calcium 730 mg 70% 
Iron 6 mg 35% 
Phosphorus 350 mg 35% 
Iodine 75 mcg 50% 
Magnesium 186 mg 45% 
Zinc 30 mg 200% 
Selenium 200 mcg 290% 
Copper 1 mg 50% 
Manganese 10 mg 500% 
Chromium 600 mcg 500% 
Molybdenum 150 mcg 200% 
Sodium 600 mg 25% 
Potassium 1230 mg 35% 
Choline 250 mg 
Inositol 250 mg 
PABA 5 mg 
Creatine Monohydrate 1 g 
L-Glutamine 500 mg 

Complex Carbohydrates, Proprietary Protein Blend (Whey Protein Concentrate, Calcium Caseinate, Egg Albumen, L-Glutamine), Artificial Flavor, Serious Mass Vitamin & Mineral Blend (Potassium Phosphate, Choline Bitartrate, Magnesium Aspartate, Beta Carotene, Inositol, d-Calcium Pantothenate, Zinc Citrate, Ascorbic Acid, Boron Amino Acid Chelate, Niacinamide, Manganese Glycinate, Kelp, d-alpha Tocopherol Succinate, Ferrous Fumarate, Copper Gluconate, Thiamin Mononitrate, Riboflavin, Pyridoxine Hydrochloride, Para-Aminobenzoic Acid, Chromium Picolinate, Selenium Glycinate, Molybdenum Glycinate, Vitamin D3, Folic Acid, Biotin, Cyanocobalamin), Medium Chain Triglycerides, Creatine Monohydrate, Acesulfame Potassium. (Vanilla shown. Slight variations may occur among flavors.)

Directions: Take 3 servings daily

Additional Info

Additional Info

Manufacturer Optimum Nutrition


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Shipping and Returns


United States Orders

All US orders are shipped via USPS First Class, USPS Priority Mail, UPS Ground, UPS 3 Day Select or UPS 2 Day Air. Orders shipped using USPS can be tracked on their website at Orders shipped using UPS can be tracked at their website, Orders are typically shipped within 24 hours, excluding weekends. Backordered items will ship as soon as inventory is available.

Priority Mail Packages typically arrive in 2-4 business days ; First Class packages typically arrive in 5-8 business days. Online tracking is available for all packages except APO/Military. For APO/Military packages, you may request a copy of the shipping label to confirm the shipment date and mailing address. The vast majority of APO/Military orders arrive within 15-30 days, depending on the class of service chosen.

Please allow 48 hours after your package has shipped before seeing movement through the USPS or UPS system. Once your package has shipped, you will be emailed a shipping confirmation. This email will provide your tracking number.

International Orders (Outside of the US)

There are 6 shipping options for international orders: USPS First Class International, USPS Priority Mail international, DHL Standard, DHL Priority, DHL Priority Plus, or DHL Parcel Priority. If we are unable to ship your item for any reason, we will contact you and issue a full refund. Online tracking is available for UPS Priority Mail International, DHL Priority, DHL Priority Plus, or DHL Parcel Priority only.

There is no online tracking for USPS First Class International or DHL Standard. Delivery speeds vary by country, city and region. First Class and DHL Standard packages delivery times average 2-4 weeks but can take up to 60 days to receive depending on the speed of your countries mail system and the process at which your counties customs processes the imcoming pacakges.

USPS Priority, DHL Priority, DHL Priority Plus, or DHL Parcel Priority packages average delivery times 6-10 days but can take up to 30 days to receive depending on the speed of your countries mail system and the process at which your counties customs processes the imcoming pacakges. These are only estimates.

Packages may be slowed by customs, and therefore we cannot make any guarantees about exact delivery dates. Orders shipped using DHL can be tracked at their website Orders shipped using USPS can be tracked on their website at


Returns are excepted within 30 days of delivery. We do not accept returns on prohormones, anti-estrogens or discontinued products. All sales are final on these items. All merchandise must be returned at your expense. Returns are not accepted on open or used supplements.

Please email or call customer service at 207-773-7957, in advance to obtain an RMA number (Return Merchandise Authorization) within 7 days of purchase date.

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