Why energy drops in your forties — gradual testosterone decline, metabolic shifts, and lifestyle factors. This page is part of the Shilajit Research hub on Evidence Before Claims. Content is for educational purposes only and is reviewed against peer-reviewed studies, FDA labeling, and current clinical guidelines. It does not provide diagnosis, treatment, or individualized medic
Reviewed by Rebecca Lin, PharmD (illustrative reviewer) — PharmD, Clinical Pharmacy. Last reviewed: May 2026. Educational content only; not medical advice.