Stress & Anxiety: Evidence-Based Supplement Guide

Stress and anxiety are among the most common reasons people seek out supplements, and the market responds with hundreds of products promising calm and relaxation. The evidence landscape here is more promising than many supplement categories - ashwagandha in particular has accumulated meaningful clinical trial data for stress and cortisol reduction. But context matters: supplements work best for subclinical stress, not for diagnosed anxiety disorders where therapy and medication have much stronger evidence.

Ashwagandha is the standout performer, with multiple RCTs showing significant reductions in cortisol levels and self-reported stress and anxiety scores. The standardized extracts KSM-66 and Sensoril have the most clinical data. Magnesium glycinate addresses the well-documented connection between magnesium deficiency and anxiety - low magnesium increases stress reactivity and can mimic anxiety symptoms. Melatonin makes this list not as a direct anxiolytic but because sleep disruption and stress form a vicious cycle, and addressing sleep can indirectly reduce daytime stress and anxiety.

An important caveat for this category: if you are experiencing clinical anxiety that interferes with daily functioning, supplements should not be your first or only intervention. Cognitive behavioral therapy (CBT) has the strongest evidence base for anxiety disorders, and prescribed medications like SSRIs are well-studied for moderate to severe anxiety.