Ginseng's ginsenosides (triterpenoid saponins) are pharmacologically versatile: (1) Rb1 and Rg1 modulate the HPA axis — reducing cortisol during stress and increasing it when needed — the classic "adaptogenic" mechanism; (2) Rg3 enhances nitric oxide production — supporting erectile function and blood flow; (3) Rb1 improves insulin signaling; (4) ginsenosides cross the blood-brain barrier and modulate cholinergic, GABAergic, and dopaminergic neurotransmission. Korean red ginseng (steamed) converts some ginsenosides to more bioactive forms (Rg3, Rk1, compound K). Fermented ginseng further improves absorption.
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Not medical advice. Based on published clinical research and systematic reviews.