From Manufacturer's Label: Containing ingredients which support energy, focus, pumps and free testosterone**, Nitraflex Pre Workout by GAT Sport is a high-intensity pre-workout formula. It contains proven muscle-building L-Citrulline malate, L-Arginine, L-Arginine Alpha-ketoglutarate (AKG) amino acids and Calcium Fructoborate (CFB), a natural, high potency form of Boron which has been shown to support free testosterone.** One scoop contains: High Citrulline:Arginine Ratio - Arginine is a proven precursor to nitric oxide (NO). Supplementing your intake of arginine stimulates the activity of arginase which is an enzyme that breaks down arginine. This may actually result in reduced arginine and NO levels which may slow down your pre-workout formula. Research suggests that supplementing with a high ratio of citrulline to arginine may reduce this risk by avoiding overstimulation of arginase**. CFB Helps Support Testosterone: In a clinical study, calcium fructoborate (CFB) was shown to increase total and free testosterone.** A longer-term study reported an increase in free testosterone by up to 29%.** Effective Dose of Beta-Alanine**: Included is a dose Beta-Alanine that you will feel working following your very first serving. (May promote slight, tingly-cerebral sensation).** Free of Creatine: Nitraflex contains no creatine, making it ideal for pre-contest preparation and lean muscle physique.** Great for both men and women. Designed for performance and energy for powered activities and sports. Blue Raspberry flavor. 10.6 oz. powder. 30 servings per container. Manufactured by: GAT Sport