Melissa officinalis L., folium · herb
Evidence tier: weak
Reduces anxiety, calms the nervous system, and supports sleep
Proposed. Rosmarinic acid inhibits GABA transaminase in vitro, which would raise GABA availability and is the standard explanation offered for a calming effect. It is laboratory work. No human study has demonstrated this is the operating mechanism.
Weak, but genuinely better than hops, and the difference is worth stating because the two are constantly sold together. Unlike hops, lemon balm has a real meta analysis. Ghazizadeh et al., Phytotherapy Research 2021 (PMID 34449930), found lemon balm significantly improved anxiety scores against placebo (SMD -0.98, 95 percent CI -1.63 to -0.33, p = 0.003) and depression scores (SMD -0.47, 95 percent CI -0.73 to -0.21, p = 0.0005). Those are real numbers and they should not be reflexively dismissed. What holds this at weak is the authors' own language, which has to travel with the numbers: lemon balm MAY be effective, PARTICULARLY IN THE ACUTE SETTING, and due to the high level of heterogeneity between studies, results should be interpreted with caution. They call out the small number of trials and the differences between their methods, and say further high quality studies are needed to firmly establish clinical efficacy. The anxiety confidence interval, -1.63 to -0.33, is very wide, which is exactly what few small heterogeneous trials produce. Regulatory status matches: EMA's HMPC monograph (EMA/HMPC/196745/2012) is traditional use only, exclusively based upon long standing use, with the well established use column blank in every section. It carries TWO indications, not one: relief of mild symptoms of mental stress and to aid sleep, and symptomatic treatment of mild gastrointestinal complaints including bloating and flatulence. The second indication is real and the seed ignores it.
EMA traditional use posology: 1.5 to 4.5 g comminuted herbal substance as an infusion, up to three times daily. Trial doses cluster at 300 to 600 mg of standardised extract. Kennedy's acute work used single doses of 300 to 1600 mg. EMA sets a stop rule, seek advice if symptoms persist beyond 2 weeks, rather than an onset.
Onset for acute stress relief: 30 to 60 minutes. Effects on sleep accumulate over 2 to 4 weeks of consistent use. Standardised extracts outperform non standardised herb in trials.
Onset: ~14 days
Well tolerated in short term use (up to 8 weeks). May potentiate sedatives, benzodiazepines, and thyroid medications. Avoid combining with CNS depressants without medical supervision. Not evaluated for long term safety beyond 8 week trials.
Pregnancy: caution
Breastfeeding: avoid
Used for over 2,000 years in European herbal medicine for nervous complaints, anxiety, insomnia, and digestive upset. Paracelsus called it the elixir of life. Central to Carmelite Water, a famous 17th century tonic prepared by Carmelite nuns. The lemon valerian combination has been studied in modern clinical trials for sleep.
Active compounds: rosmarinic acid, citral, citronellal, geraniol, eugenol
Remedies using Lemon Balm · Browse by body system · Check it against what you take
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