Pharmacognosy intro
Nettle Root (pharmacologically DISTINCT from nettle leaf) contains lignans ((+)-neoolivil, secoisolariciresinol, dehydrodiconiferyl alcohol) as SHBG-binding inhibitors; lectins (Urtica dioica agglutinin/UDA) with immunomodulatory properties; acid-soluble polysaccharides with anti-inflammatory activity; sterols (β-sitosterol, stigmasterol, campesterol); scopoletin (a coumarin derivative); and homovanillyl alcohol. The PRIMARY mechanism is SHBG receptor binding inhibition: lignans bind to sex hormone-binding globulin (SHBG), preventing SHBG from binding to its receptor on prostate cell membranes. This INCREASES free testosterone bioavailability while reducing SHBG-mediated prostate cell growth signals, this is NOT the same as increasing total testosterone. Additional mechanisms include aromatase inhibition (reducing testosterone-to-estradiol conversion in adipose tissue, relevant for age-related estrogen increase in men), mild 5α-reductase inhibition (less potent than saw palmetto but additive when combined), and prostate-specific anti-inflammatory activity. CRITICAL DISTINCTION: Nettle ROOT is for prostate/hormonal use; Nettle LEAF is for allergies/nutrition, different parts, different chemistry, different applications.