Your Cart is Empty

FREE 1-3 Day Delivery on Orders Over $85!

When Will I Receive My Order?

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

FREE Shipping

On Orders Over $85 (See Details)

15% Off RTD Protein Shakes!
Use Code: RTD15

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?

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