welcome: sign in|account|help
2 Sites 1 Bag
0 items $0.00checkout
We're sorry. The product you requested is no longer available on our web site. We recommend the following item in its place. Or, shop the drugstore.com homepage.


GNC Pro Performance 100% Soy Isolate Protein Mix, Chocolate 14.79 oz (420 g)

our price: $21.99$1.49 / oz
GNC member: $18.69 learn more »
save 15% ($3.30)
in stock
/img/sites/0//autodelivery/pdetails-new-tag.gif Auto-Reorder & Save: Get 10% off or more on all future shipments of this item. learn more »

GNC Membership Card
save up to 50% on GNC department products every day when you purchase a GNC Membership Card. Shop brands like GNC, Optimum Nutrition, BSN, USPlabs, Burt's Bees, Badger, Yes To and more.
learn more »
GNC member price:
+ Membership Card:
Hidden Tab
Hidden Tab
Hidden Tab
Hidden Tab

Isolated Soy Protein Mix

  • Chocolate Supreme Flavor
  • 25g of Protein
  • 130 Calories
  • 2g Sugar
  • 3g Carbs
  • Contains Natural & Artificial Flavors
  • 315% More Arginine & 111% More Glutamine vs. Standard Whey
  • Powerful Protein Formula Featuring All 9 Essential Aminos
  • Low Carb Diet Friendly, Natural Vegetarian Protein Source
  • Banned Substance Free^
  • 12 Servings
  • For Daily Use, Post-Workout & Recovery
  • Vegetarian
  • Powered by Supro® Performance Protein


Daily Dose

Protein (g)


No Training / Off Day

1/2 - 1 Scoop

12.5 - 25

Fuels lean muscle & metabolism.

Cardio Training

1 Scoop


Supports recovery.

Resistance Training

1 - 2 Scoops

25 - 50

Boosts nitrogen balance.

Cardio & Resistance

2 Scoops


Replenishes anabolic building blocks.

The dosage chart above is a recommendation by GNC Scientists for best results from 100% Soy Isolate.  It is recommended that the minimum daily dose is taken on each day based on activity level.

Pro Performance® 100% Soy Isolate is a protein shake that is cholesterol-free, with no lactose, and is from vegetarian sources.  Soy protein is one of the most anabolic proteins.  One of the biggest misconceptions behind this protein is the link to estrogen production; however, it contains all of the essential amino acids, including BCAA.  BCAA may help preserve muscle glycogen stores and reduce the amount of protein breakdown during exercise.  This formula features Supro soy protein, one of the most clinically studied soy proteins.  Supro is made from soybeans that are produced while being tightly monitored and controlled from planting through processing.

The Pro Performance® Results Advantage
Protein is an essential nutrient that is necessary for the growth, repair and maintenance of body tissues such as skin, bones and muscles.  Studies have shown that soy protein taken by active individuals helps support muscles during exercise.  Additionally, diets low in saturated fat and cholesterol that include 25g of soy protein a day my reduce the risk of heart disease.

One serving of Pro Performance 100% Soy Isolate features 25g of protein providing an equivalent nitrogen factor of 25.  Soy protein is an effective source of nitrogen for fueling lean muscle mass.  Your muscles can only grow when your body retains enough nitrogen.  This formula delivers naturally-occurring anabolic amino acids into your bloodstream.  This spike in aminos provides nitrogen and subsequently creates a nitrogen-rich environment needed for maximum muscle protein synthesis.  Protein synthesis is crucial to the building of lean muscle mass.

The Pro Performance® Quality Advantage
GNC Pro Performance 100% Soy Isolate is also tested for banned substances,^ providing peace of mind in the highest quality formulation.  Our researchers created a superior formula that not only delivers muscle fueling results, but every flavor has a satisfying, delicious taste profile.  Each serving mixes up instantly with a blender, shaker, or a spoon — It's that smooth and it couldn't be easier.

This product supplies only natural occurring amino acids.

Informed Choice
Products bearing this logo have been tested for banned substances by HFL Sport Science, a world-class anti-doping lab.

No Artificial Colors, No Wheat, No Gluten, No Dairy, Yeast Free.

Significant product settling may occur.


^Product was tested for over 145 banned substances on the 2012 World Anti-Doping Agency (WADA) Prohibited List via HFL skip lot testing protocol #ICP0307.

*These statements have not been evaluated by the Food & Drug Administration.  This product is not intended to diagnose, treat, cure or prevent any disease.


Contains:  Soybeans.  Notice:  Use as a food supplement only.  Do not use for weight reduction.

©General Nutrition Corporation

related products
MuscleTech Platinum 100% Iso-Whey, Peanut Butter Chocolate
Dietary Supplement NEW MuscleTech® Research & Development America's #1 Selling ...
Nature's Way Alive! Soy Protein Ultra-Shake, Chocolate 
Dietary Supplement Whole Food Energizer™ Soy Protein Non-GMO Vegetarian Chocolate ...
Six Star Elite Series PS Soy Protein, Vanilla 
Dietary Supplement New! Ultra-Premium, 100% Soy Protein with Added Vitamins ...