The Short Version
Multiple randomized, double-blind, placebo-controlled trials and a meta-analysis confirm that lemon balm supplementation can reduce anxiety and produce calming effects, supported by a well-characterized GABAergic mechanism. However, the claim is somewhat overstated: most positive trials used proprietary standardized extracts (e.g., Cyracos) in populations pre-selected for emotional distress or comorbid conditions, and the meta-analysis flagged high heterogeneity. The effect is real but mild compared to pharmaceutical anxiolytics, and results may not generalize to all lemon balm products or all populations.