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What the research says
More than a hair oil. And we cite every word.
People reach for Peppermint for far more than one thing. Here’s what the published studies actually found — graded honestly, each one linked.
15
uses studied
18
papers cited
0
hidden from you
What the published studies found
Early evidence · 2 studies
Fungal Infection
In-vitro studies show peppermint essential oil and its constituent menthol demonstrate antifungal activity against various pathogenic fungi including Aspergillus flavus, with dose-dependent growth inhibition observed in laboratory settings.
A systematic review and one controlled trial provide moderate evidence that peppermint oil/menthol may have analgesic effects for headache, with topical application showing promise for acute treatment.
Two review articles mention peppermint essential oil's potential efficacy for psoriasis, but no specific clinical trials or controlled studies directly testing peppermint oil for psoriasis were found.
Only one study examined peppermint for acne, where it was used as a fragrance additive in a cream containing other active ingredients, showing some antibacterial activity against P. acnes in laboratory testing. No studies have directly tested peppermint oil alone for acne treatment in humans.
One controlled study showed peppermint leaf extract reduced ATP release from skin cells and improved dermal thickness and wrinkles in humans, but this is limited evidence from a single study. A comprehensive review of peppermint's bioactivity mentions antioxidant properties but does not specifically address anti-aging effects.
Limited evidence from one controlled trial suggests peppermint aromatherapy combined with light therapy may reduce physiological stress markers and anxiety scores. However, peppermint was tested in combination with light therapy, not as a standalone treatment.
Only one study found used peppermint (Mentha piperita) extract for synthesizing gold nanocomposites that showed wound healing properties in infected wounds, but the peppermint was used as a reducing agent for nanoparticle synthesis rather than as the primary therapeutic agent.
One systematic review mentions peppermint essential oil among various oils studied for skin applications, but provides no specific evidence or detailed findings regarding peppermint's effectiveness for dry skin treatment.
Only one study mentions peppermint oil's traditional use for eczema in passing, but focuses on antimicrobial effects against tick-borne bacteria rather than eczema treatment. No clinical trials or controlled studies specifically testing peppermint oil for eczema were found.
One animal study in mice found that 3% peppermint oil promoted hair growth more effectively than minoxidil, increasing dermal thickness, follicle number, and follicle depth. However, this evidence is limited to a single preclinical study with no human trials available.
One animal study showed that a nanoemulsion containing peppermint and rosemary essential oils reduced osteoarthritis pain and inflammation in rats through antioxidant mechanisms. No human clinical trials or studies testing peppermint oil alone for joint inflammation were found.
Limited evidence shows peppermint oil may have analgesic properties based on one case study for neuropathic pain and animal studies, but no clinical trials specifically for muscle pain were found.
One in vitro study found peppermint oil had moderate effectiveness against Demodex folliculorum mites (which are associated with rosacea), ranking in the middle tier among tested essential oils but below lemongrass, sweet basil, clove, and tea tree oils.
One in-vitro study found that peppermint essential oil (MIC = 1.0 mg/mL) showed antifungal activity against Malassezia furfur, the yeast that causes seborrheic dermatitis which can manifest as scalp irritation. The study demonstrated synergistic effects when peppermint was combined with other essential oils and showed anti-inflammatory properties.
One small crossover study with 30 participants found no difference between peppermint (Mentha piperita) and simethicone for reducing crying duration or episodes in infantile colic. No evidence was found for peppermint oil specifically treating sleep disorders or insomnia.
