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L-arginine is an amino acid, sold as capsules, tablets or powder, often as arginine AKG (AAKG). It is a common stimulant-free ingredient in pre-workouts. Compare milligrams per serving and the form on the label.
See also citrulline malate and nitric oxide formulas.
L-Arginine: questions
What is AAKG?
Arginine alpha-ketoglutarate, a form of arginine bound to another compound.
If you take medicine, can you take arginine?
Ask your doctor first, especially if you take blood pressure medicine.

