TrueFLOW contains the amino acid L-arginine. This special combination was formulated to assist with healthy blood flow and circulation to the brain, limbs and reproductive organs. L-arginine is used for protein synthesis in the body. It is a precursor for an enzyme that increases the body’s production of nitric oxide, which the body uses to keep blood vessels dilated, improving the blood, and subsequently oxygen, supply to the heart and other organs. Researchers have begun using L-arginine in people with angina and congestive heart failure and studies have shown that L-arginine can improve erectile dysfunction by increasing blood flow to the genitals.