Adaptogen Research Finds Limited Stress Benefits; Three‑Week Diet Promoted for Brain Health

A 2025 systematic review and meta‑analysis of 15 randomized trials involving 873 participants found that ashwagandha (Withania somnifera) modestly lowered cortisol levels and reduced stress‑and‑anxiety scores compared with placebo, though it did not improve overall quality of life. Earlier analyses of nine studies with 558 patients reported similar reductions in perceived stress, anxiety and cortisol, but the evidence base remains limited: trials are short‑term, often funded by supplement manufacturers, and largely conducted in India. Safety data show ashwagandha is generally well tolerated, with rare cases of liver injury and potential interactions with thyroid hormones.

Evidence for functional mushrooms such as reishi and lion’s mane is weaker, consisting mainly of small, short‑duration experiments that do not support claims of them being a “medicine for stress.”

Separately, a three‑week dietary program is described for improving mood, concentration, energy, and reducing stress hormones while lowering long‑term dementia risk. The plan emphasizes whole foods sourced locally, nuts, reduced wheat and refined carbohydrates, ample water, unrefined plant oils (olive, avocado, coconut), quality animal proteins, and appropriate vitamin supplementation for vegetarians. The regimen is presented as a sustainable lifestyle habit rather than a quick fix.