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Table 2 Pre-workout supplement ingredients for the active (GT) and placebo (PL) groups.

From: The effects of a pre-workout supplement containing caffeine, creatine, and amino acids during three weeks of high-intensity exercise on aerobic and anaerobic performance

GT Supplement PL Supplement
Calories: 40 Calories: 40
Calories from Fat: 5 Calories from Fat: 0
Total Fat: 0 g    Maltodextrin: 17 g
Cholesterol: 20 mg Proprietary Blend: 3 g
Sodium: 270 mg Total Carbohydrates: 2 g Sugars: 2 g Natural and artificial flavors, citric acid, sucralose, acesulame potassium, Red#40
Protein: 8 g  
Vitamin A: 0%  
Vitamin C: 0%  
Calcium: 4%  
Vitamin B12: 2000%  
Vitamin B6: 500%  
Iron: 0%  
Proprietary Blend: 2100 miligrams Cordyceps sinensis, Arginine AKG, Kre-Alkalyn, Citrulline AKG, Eleutherococcus senticosus, Taurine, Leucine, Rhodiola Rosea, Sodium Chloride, Valine, Isoleucine, Caffeine, Whey Protein Concentrate