“Mentha Piperita Oil?”Here!peppermint oil
Appears in 1 scanned product.
In personal care
An essential oil steam-distilled from the leaves of the peppermint plant. Its main active component is menthol, the compound responsible for the cooling sensation.
Why it’s used
It contributes a fresh scent and a tingling, cooling feel to products like lip balms, foot creams, scalp treatments, and toothpaste. That cooling effect is a real sensory cue many formulas are built around.
What the evidence says
Cosmetic safety panels (CIR, 2001 and 2023) concluded peppermint oil is safe in cosmetics at current use concentrations (up to 3% rinse-off, 0.2% leave-on) provided products are formulated to be non-sensitizing, and animal studies found it was not a sensitizer at 8% in a maximization protocol. However, a large patch-test registry study found a 0.6% allergic reaction rate among 28,128 patients tested with 2% peppermint oil, with reactions most often linked to oral hygiene products, lip products, and foods, and nearly a third of reactions rated strong or extreme. This indicates a real but low-frequency contact sensitization risk at normal cosmetic exposure, rather than a settled absence of concern.
Context
Effects are concentration dependent: trace amounts for scent in a rinse-off shampoo pose little concern, while higher concentrations in a leave-on lip or skin product are more likely to cause tingling, redness, or irritation in sensitive users. Not generally recommended for use near the eyes or on infants.
Rumors
Peppermint oil treats acne by killing acne-causing bacteria.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Anveya — a brand: sells hair and skin care products
How we know who this is
- “Anveya was born with a compelling vision to create products that not only matched, but surpassed the quality standards of international counterparts.” (their page)
- “We are an evidence-based, cosmeceutical brand that offers a comprehensive range of scientifically proven solutions for diverse hair and skin concerns.” (their page)
- Anveya — a brand: sells hair and skin care products
Peppermint oil promotes hair growth by stimulating hair follicles and increasing blood circulation to the scalp.
Supports — suggestivehealth and safety evidence
Studied in: C57BL/6 mice (topical application, animal model, not human).
Measured as an outcome.
- Peppermint Oil Promotes Hair Growth without Toxic Signs (Peer-reviewed) · Funding not checked
Who’s saying this
- Mielle — a brand: sells hair care products for textured hair
How we know who this is
- “Since launching in 2014, Mielle has grown from a kitchen vision to a global beauty brand, offering 10 collections and reaching more than 87 countries and over 100,000 stores across the US.” (their page)
- “Every product is made to meet the evolving needs of textured hair, helping you feel confident in your routine and empowered in your expression.” (their page)
Peppermint oil reduces dandruff because it kills microbes on the scalp.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Parrotfish — a brand: sells plastic-free shampoo, conditioner and soap bars
How we know who this is
- “By shopping with Parrotfish, customers support a small business's vision, mission, and commitment to positively impacting the world.” (their page)
- “Explore Our Top-Rated Shampoos, Conditioners, Soaps, and Shower Steamers – See Why Customers Give Us 5-Star Reviews!” (their page)
- Parrotfish — a brand: sells plastic-free shampoo, conditioner and soap bars
Peppermint oil in toothpaste fights the bacteria that cause tooth decay, gum disease and bad breath.
Does not support — suggestivehealth and safety evidence
Measured as a biomarker.
- Antimicrobial Activity of Commercially Available Essential Oils Against Streptococcus mutans (Peer-reviewed) · Funding not clearly stated · No conflicts declared
- Effects of Labrador Tea, Peppermint, and Winter Savory Essential Oils on Fusobacterium nucleatum (Peer-reviewed) · Funding not checked
Who’s saying this
- Terra & Co. — a brand: sells oil pulling blends and hydroxyapatite toothpaste
How we know who this is
- “Amra’s personal search for a more thoughtful approach to oral wellness inspired Terra & Co.” (their page)
- “Terra & Co.® brings together oil pulling blends and hydroxyapatite toothpaste for a daily routine focused on fresh breath, enamel care, and a cleaner mouth.” (their page)
Peppermint oil causes skin irritation, burning and allergic contact dermatitis, especially on sensitive skin.
Supports — suggestivehealth and safety evidence
Studied in: patients referred for diagnostic patch testing (North American Contact Dermatitis Group registry, 2009-2020).
Measured as an outcome.
- Patch Testing to Mentha piperita (Peppermint) Oil: The North American Contact Dermatitis Group Experience (2009-2020) (Peer-reviewed) · Funding not checked
Who’s saying this
- skinsort.com — we couldn’t open the site to see who runs it