outcome

mental health

Observational studyPreliminary evidence

Can Low Vitamin D Affect Your Mood?

A large genetics study suggests vitamin D and depression may share underlying biology — making vitamin D status a smart marker to know, track, and correct when low.

Meta-analysisStrong evidence

Ashwagandha for stress looks promising — but it’s not an instant calm button

People usually want to know whether ashwagandha meaningfully helps everyday stress, how fast it works, and whether the hype around cortisol is backed by actual trials.