50mg per serving
A source of dietary nitrates tied to blood flow and circulation research.
Beet Root (Beta vulgaris) is a well-known source of dietary nitrates, which the body can convert into nitric oxide, complementing L-Arginine's role in this formula.
Most beet root research on circulation and exercise performance uses considerably larger doses, often as concentrated juice or powder in the multiple-gram range — 50mg of extract here is a smaller supporting dose rather than a primary active amount.
It's best understood as a complementary ingredient to the formula's other circulation-focused components rather than a standalone driver of effect.