Skip to main content
Your Cart is Empty

FREE 1-3 Day Delivery on Orders Over $49!

When Will I Receive My Order?

FastShip - When will I receive my order?

Save 10% on your next order!
Sign up for our store newsletter.

FREE 1-3 Day Delivery

Over $49

Take 40% Off Third Box of 18-Count Original Vanilla Meal Replacement

Use promo code: VANILLA40

Xtreme Size Up - Chocolate - 6 lb.

Xtreme Size UpChocolate - 6 lb.

6 lb. canister
$69.88
4-Pack (4 x 6 lb. canister)
$239.52

When Will I Receive My Order?

FastShip - When will I receive my order?

METAMYOSYN® Muscle Mass Formula*

Specially designed for hard gainers who want to gain weight and pack-on quality mass.*

MET-Rx® Xtreme Size Up is the ultimate muscle mass gainer, and features FOUR Hardcore Optimizer Blends to help you keep growing.*

Product Highlights:

  • 60 grams protein per serving
  • 64-67 g energizing Carbs
  • 3g Creatine
  • 3g Glutamine
  • 600 calories per serving!
  • No Fructose or Aspartame
  • Mixes quickly and goes down easy
  • ^Depending on flavor