Lamiaceae
Melissa officinalis
Lemon balm · Balm
- Part used
- leaf
- Native range
- Southern Europe, the Mediterranean and western Asia; naturalised widely
- Morphology
- A square-stemmed perennial to about eighty centimetres with wrinkled toothed leaves smelling strongly of lemon when bruised, and small white flowers much visited by bees.
What is in it
Evidence
Small trials report reduced anxiety and improved sleep quality, often in combination products which makes attribution difficult. Topical preparations have some evidence in herpes simplex lesions.
Safety
Well tolerated. Sedation at higher doses. Reports of effects on thyroid function mean caution in thyroid disease.
Interactions: Additive sedation with CNS depressants; Possible interference with thyroid medication
Regulatory: Permitted as a food and as a listed medicine ingredient.
How the traditions classify it
Three systems, rating the same plant. Where they disagree, none of them is correcting the others — they are separate frameworks that arrived at their categories independently.
Historical use
Grown for bees since antiquity — the genus name is Greek for honeybee. Used consistently for anxiety, low mood and sleep, and as an ingredient of Carmelite water from the seventeenth century.
Recorded as history and attributed where possible. Long use establishes that a plant was widely used, not that it worked, and not that it was safe.
Worth knowing
Lemon balm is a good example of a traditional claim surviving essentially unchanged for two thousand years. Dioscorides says it lifts the spirits. Avicenna says it lifts the spirits. Gerard says it "maketh the heart merry". Culpeper says the same. Modern trials say, cautiously, that it may modestly reduce anxiety.
Continuity of a claim is not evidence for it — every entry in this collection is a warning about that — but it is at least unusual for the modern finding to point in the same direction as the unbroken tradition, and it is worth noting when it does.
Nomenclature verified against GBIF backbone taxonomy.