Now Sports Products Are Comprehensively Tested So You Can Trust That Our Products Are Pure And Effective For Every Level Of Athletics Nitrogen Transporter*: In The Body, Glutamine Functions As A Major Nitrogen Transporter And Is Critical For The Maintenance Of Healthy Nitrogen Balance Double Strength Product: 2X The L-Glutamine (1,000 Mg Per Capsule) As In Our Regular Strength Product (500 Mg Per Capsule) Gmp Quality Assured: Npa A-Rated Gmp Certification Means That Every Aspect Of The Now Manufacturing Process Has Been Examined, Including Our Laboratory/Testing Methods (For Stability, Potency, And Product Formulation) Packaged In The Usa By A Family Owned And Operated Company Since 1968 Glutamine Is Considered To Be A Conditionally Essential Amino Acid, Which Means That Under Certain Circumstances, The Body May Require More Glutamine Than It Can Produce. In The Body, Glutamine Functions As A Major Nitrogen Transporter And Is Critical For The Maintenance Of Healthy Nitrogen Balance.* Glutamine Also Acts As The Primary Fuel For The Rapidly Growing Cells Of The Immune System And Gi Tract.* This Double Strength Product Has Twice The L-Glutamine (1,000 Mg Per Capsule) As In Our Regular Strength Product (500 Mg Per Capsule)