How Cannabis Affects Hormones: Thyroid, Adrenal, Reproductive, and Metabolic Effects

Key endocrine effects include: reduced female fertility and adverse pregnancy outcomes, reduced sperm counts and function, lower thyroid hormone levels with acute use, blunted stress response with chronic use, increased prediabetes risk but paradoxically lower diabetes risk, suggested improvement in HDL and triglycerides, and modest increase in fracture risk.

Review synthesizing evidence on cannabis effects across thyroid, adrenal, and gonadal function, plus glucose control, lipid metabolism, and bone health, drawing from animal data, population studies, and known endocannabinoid system properties.

The endocannabinoid system interacts with virtually every endocrine process. As cannabis use increases, understanding these hormonal effects is essential for clinical practice across multiple medical specialties.

The breadth of endocrine effects underscores that cannabis is not a benign substance for metabolic health, even as some effects (improved lipids, lower diabetes risk) appear paradoxically beneficial.

Many findings come from observational studies that cannot establish causation. Dose-response relationships and differences between acute and chronic use are often unclear.