There are mass gainers, and then there’s NutraBio Extreme Mass. What sets this weight gainer apart from the competition is its clean formula that provides you with everything you need and nothing that you don’t, helping you add the quality size you want during your bulk without the additional body fat.

NutraBio Extreme Mass gainer uses two premium protein sources to help you reach your daily intake: whey protein concentrate (WPC80) and micellar casein. This one-two protein punch provides you with an immediate source of amino acids while also providing a sustained release for upwards of seven hours. Not only will Extreme Mass help you add lean muscle mass and improve recovery, but it can also aid in muscle preservation and prevent the breakdown of your hard-earned muscle.

-650 calories, 53g protein, 100g carbs, and 6g fat in a delicious and filling shake.
-Clean profile containing 12g BCAAs to support muscle growth.
-Helps to achieve your daily caloric needs without the added junk more easily.
-Improves muscle recovery following intense training sessions
-Minimizes muscle tissue breakdown to preserve your hard-earned mass

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We want you to be confident in every purchase. If you are not satisfied with a product, we will work with you to find a fair solution.

Returns and Refunds

Unopened Products

• May be returned within 30 days of purchase for a full refund.
• Product must be in resalable condition.
• Original receipt or proof of purchase required.

Opened Products

• May be returned within 30 days if the product did not meet expectations.
• Refunds for opened products are limited to one return per product, per customer, within a 12-month period.
• Products that are substantially consumed (for example, more than 50% used) may not qualify for a refund.

Damaged or Incorrect Orders

If an item arrives damaged or you receive the wrong product:

• Contact us within 7 days of delivery.
• We will replace the item or issue a full refund, including shipping charges when appropriate.

Non-Returnable Items

The following items are not eligible for return:

• Clearance or closeout merchandise.
• Expired products due to customer storage.
• Gift cards.
• Products intentionally damaged or altered.
• Special-order items.

Shipping Charges

• Original shipping charges are non-refundable except when the error was ours.
• Customers are responsible for return shipping costs unless the product was damaged, defective, or shipped incorrectly.

Abuse Prevention

Nutrition World reserves the right to limit or refuse returns when there is evidence of excessive return activity, misuse of the policy, fraudulent behavior, or repeated returns of similar products.

How to Request a Return

Contact our customer service team with:

• Order number
• Product name
• Reason for return

Most requests will be reviewed within 2 business days.

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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. Nutrition World assumes no liability for inaccuracies or misstatements about products.Any items offered by Nutrition World are not intended to diagnose, treat, cure, or prevent any disease. Seek additional advice from a qualified health care provider.

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