The most-studied botanical for the ageing prostate.
Saw Palmetto (Serenoa repens) berries are the most-studied botanical in the men's-health category specifically for prostate support, included here for the DHT pathway rather than testosterone directly.
It's studied for its interaction with 5-alpha-reductase, the enzyme that converts testosterone to DHT, which is relevant to prostate size and urinary comfort as men age.
Primordial Vigor X includes Saw Palmetto as its third lead botanical, making the formula relevant for men over 40 specifically.