SIZER XXL is a powerful mass gaining formula designed to pack size on the hardest gainers. This potent formula delivers more calories and protein gram for gram. American Pure Whey puts an emphasis on the amount of protein per serving since it is the only nutrient proven to assist in promoting muscle mass. Enriched with 70 g of protein per serving which will assist in quick muscle recovery post workout.

American Pure Whey uses only cross flow, micro filtered, cold processed ion exchanged whey protein. This protein has a superior amino acid profile, an unbeatable bioavailability, is low in lactose and is instantized for easy mixing without a blender.

You simply will not find a protein of this grade used in other weight gain formulas. American Pure Whey has avoided overloading its formula with carbohydrates. American Pure Whey uses just enough to help fuel your workouts and replenish depleted glycogen stores, but not enough to cause drowsiness.

Studies show that too many carbohydrates increases the levels of serotonin crossing over the brain barrier, thereby inducing drowsiness. Fat, although shunned by some, is highly concentrated energy source (double that of protein and carbohydrates) supplying the body with fat soluble vitamins A, D, E, and K.

Fat is also a necessary component of all cell membranes, nerve covering, digestive secretions and most importantly, hormone production. A diet too low in fats may actually impair growth.

SIZER XXL contains nearly double the amount of protein (amino acids) than competing brands, and only protein builds muscle. No product contains more protein or calories or derives its calories from higher quality muscle building ingredients. The next generation of Musclegain.