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Peppermint Essential Oil
The evidence

Peppermint Essential Oil

Moderate evidence   Cooling and high in menthol — a few drops wake up a tired scalp and tight temples.

ModerateControlled human trialsRepeated studies in people.
EarlySmall / lab / animalPromising, not yet proven in people.
TraditionalLong-usedClinical evidence still anecdotal.
NoneNo trials foundWe looked and found none.
Key takeaways · last updated 2026-07-16

Peppermint Essential Oil carries an overall Moderate evidence grade across 18 studies we have read; the strongest signal is for headache.

  • Headache — Moderate evidence. A systematic review and a controlled trial give moderate evidence that menthol can ease tension headache. PubMed 7954745
  • Hair growth — Early evidence. In a mouse study, 3% peppermint oil grew hair more effectively than minoxidil — striking, but animal-only. PubMed 25584150
  • Fungal — Early evidence. Lab studies show peppermint and menthol have antifungal activity. PubMed 12744290

What the studies say

Headache

Moderate

A systematic review and a controlled trial give moderate evidence that menthol can ease tension headache.

Read the study on PubMed →

Hair growth

Early

In a mouse study, 3% peppermint oil grew hair more effectively than minoxidil — striking, but animal-only.

Read the study on PubMed →

Fungal

Early

Lab studies show peppermint and menthol have antifungal activity.

Read the study on PubMed →

Mood & stress

Early

A controlled trial suggests peppermint aroma may ease physiological stress.

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Skin ageing

Early

A controlled study found peppermint leaf extract improved dermal thickness.

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Joints

Early

An animal study with peppermint + rosemary reduced osteoarthritis pain.

Read the study on PubMed →
Back to PeppermintAll oils, graded

Study counts reflect our internal research database. Figures are honest tallies, not marketing claims; every linked study opens on PubMed.