Short answer: nattokinase is studied for its relationship to blood flow, while Pine Bark Extract (Pycnogenol) is a well-studied antioxidant linked to vascular function — two different, complementary angles on circulation support.
Nattokinase: the circulation-relationship enzyme
Derived from fermented soybeans, nattokinase is studied in relation to healthy blood flow and circulatory health — a less common inclusion in general men's health formulas.
Pine Bark Extract: the vascular antioxidant
Pycnogenol is one of the more researched antioxidant extracts, with studies linking it to supporting nitric oxide production and vascular function specifically.
Why pairing an enzyme with an antioxidant makes formulation sense
Addressing circulation from an enzyme angle alongside vascular antioxidant protection reflects a more complete approach than either ingredient alone — though pairing them doesn't guarantee a specific combined outcome.
See both in Boostaro's full formula
Named plainly, alongside five other actives.
See the Ingredients