Endurox® R4® - Lemon LimeLemon Lime | GNC

Pacific Health Laboratories Endurox® R4®


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Item # 049509

Product Information



The Proven Science.

Endurox® R4®with it's patented ratio of carbohydrate to protein (4:1) plus antioxidants, electrolytes and glutamine, is proven to help muscles:

Recover Faster
Replenishes muscle glycogen levels 128% more than a carbohydrate drink*
Carb/Protein formula rebuilds muscle protein 38% more than a protein drink.

Recover Better
Reduces post-exercise muscle damage up to 36%.

Come Back Stronger
Extends endurance up to 55% in a subsequent workout.

Endurox® R4® Recovery Drink
The drink that advanced the science of muscle recovery.

Developed by leading exercise physiologists Endurox® R4®, with its patented ratio of carbohydrates to protein, is proven to speed muscle recovery and reduce muscle damage following exercise. No product can help your muscles rebuild and recover faster.

And, because different athletes have different recover needs, we’ve also created Endurox® Restore, for exercise bouts lasting less than one hour. Both improved Endurox® R4 and Endurox® Restore contain the proven and patented science of the 4-1 carbohydrate to protein ratio.


Nutrition Facts
Serving Size  2 Servings
Servings Per Container  14

Amount Per Serving     % DV

Calories 270  
  Calories from Fat 10  

Total Fat 1g   2%
  Saturated Fat 0g  
Cholesterol 10mg   3%
Total Carbohydrate 52g   17%
  Dietary Fiber 0g  
  Sugars 40g  
Protein 13g   26%

Vitamin C 470 mg   783%
Vitamin E 400 IU   1333%
Calcium 100 mg   10%
Magnesium 240 mg   60%
Sodium 210 mg   9%
Potassium 120 mg   3%

L-Glutamine  420 mg   **

** Daily Value (DV) not established.
Other Ingredients
Dextrose, Whey Protein Concentrate, Complex Carbohydrates, Fructose, Sucrose, Citric Acid, Magnesium Carbonate, Natural Flavors, Ascorbic Acid, Sodium Chloride, L-Glutamine, Vitamin E Acetate, Lecithin, Monopotassium Phosphate, Yellow 5, Blue 1
Label (click image to enlarge)

How To Use

Mix 2 scoops with 12 ounces of cold water. Take immediately after exercise.
Store at room temperature(55-85 degrees F., Avoid excess heat above 104oF (40oC).
©2008 PacificHealth Laboratories, Inc. All rights reserved. Manufactured for PacificHealth Laboratories, Inc. Matawan, NJ 07747 Endurox® R4® is a registered trademark of PacificHealth Laboratories, Inc. U.S. patent #6,051,236. Additional patents pending.


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Browse 3 questions Browse 3 questions and 2 answers
if you just finish working out with heavy weights what do you drink a protein shake or endurox. or both
A shopper on Dec 6, 2009
BEST ANSWER: both; there's not enough protein in endurox r4 to make it sufficient alone post-workout.
Is this product legal if you play college sports under the NCAA rules?
A shopper on Jul 20, 2012
BEST ANSWER: Yes this is legal product under NCAA rules.
Did u guys have enduro stack boost?
A shopper on Oct 9, 2018