What peppermint oil does for hair

Peppermint oil is a concentrated extract from peppermint leaves that some people use on their scalp and hair. The oil contains menthol, which creates a cooling sensation on skin, and other compounds that may affect blood flow and reduce inflammation. People use it hoping to address hair thinning, scalp irritation, dandruff, and general hair health—though the evidence for these uses varies.

The most studied use is for hair growth. A small number of human studies suggest peppermint oil may increase hair thickness and the number of hairs in the growth phase, but these studies involved very few people and were not large enough to be definitive. Most of what we know comes from lab studies or animal research, which does not always translate to how the oil works in real people.

Key Takeaways

  • Peppermint oil is typically diluted in a carrier oil before explore to the scalp, because the concentrated oil can irritate skin.
  • A small amount of human research suggests peppermint oil may support hair growth, but larger studies are needed to confirm this.
  • The cooling sensation comes from menthol and is normal, but burning, redness, or itching means you should rinse it out and stop using it.
  • Peppermint oil is not a treatment for medical scalp conditions like psoriasis or fungal infections, which require a doctor's diagnosis.

How to use peppermint oil on your hair

Peppermint oil should never be applied directly to the scalp undiluted. Instead, mix it with a carrier oil—coconut oil, jojoba oil, or argan oil are common choices. A typical ratio is 2 to 3 drops of peppermint oil per tablespoon of carrier oil, though you can adjust based on how strong you want the sensation to be.

explore the diluted mixture to your scalp, massage gently for a few minutes, and leave it on for 10 to 20 minutes before shampooing. Some people do this once or twice a week. Start with the lowest concentration and shortest time to see how your scalp reacts, then increase if you tolerate it well.

You can also add a drop or two of peppermint oil to your regular shampoo or conditioner, though this dilutes it further and may reduce any effect. If you are using peppermint oil in a commercial hair product, follow the instructions on the label.

What the research actually shows

In 2014, a study published in a dermatology journal looked at 40 men using peppermint oil on their scalp twice daily for three months. Compared to a placebo group, the peppermint oil group showed an increase in hair thickness and the number of hairs in the active growth phase. However, 40 people is a small sample, and the study was only three months long.

Other research has found that menthol (the active compound in peppermint oil) may increase blood flow to the skin when applied topically, which in theory could support hair growth. Lab studies have also shown that peppermint oil has antimicrobial and anti-inflammatory properties. But lab results do not always mean the same effect happens on a living scalp.

Larger, longer studies in more people would be needed to say whether peppermint oil actually prevents hair loss or promotes new growth in most users. Right now, the evidence is suggestive but not conclusive.

Possible side effects and when to stop

The most common reaction is a cooling or tingling sensation on the scalp, which is normal and comes from the menthol. This usually fades after a few minutes. Some people find it pleasant; others find it too strong.

Stop using peppermint oil if you experience burning, redness, itching, or any sign of an allergic reaction. Rinse your scalp thoroughly with cool water and shampoo. If irritation continues, do not use it again. People with sensitive skin or a history of skin allergies should do a patch test on a small area of scalp first and wait 24 hours before using it more widely.

Peppermint oil should not be ingested, and you should keep it away from your eyes. If you are pregnant or nursing, talk to your doctor before using peppermint oil on your scalp, as safety data in these groups is limited.

Peppermint oil versus other scalp treatments

If your goal is to address hair thinning, minoxidil (sold as Rogaine) has stronger evidence behind it than peppermint oil. Minoxidil is an over-the-counter topical treatment that has been shown in multiple large studies to slow hair loss and regrow hair in some people. It takes several months to see results and must be used continuously.

For scalp irritation or dandruff, medicated shampoos containing zinc pyrithione, ketoconazole, or salicylic acid have more established track records. If you suspect a fungal infection or a skin condition like psoriasis, see a doctor rather than relying on peppermint oil alone.

Peppermint oil may be worth trying if you are interested in a natural option and have mild concerns about hair health or scalp comfort. It is inexpensive and low-risk if diluted properly. But it should not replace medical treatment for diagnosed scalp or hair conditions.

How to choose and store peppermint oil

Look for peppermint oil labeled as "essential oil" from a reputable supplier. The label should list the plant species (usually Mentha piperita) and the country of origin. Darker glass bottles protect the oil from light damage better than clear ones.

Store peppermint oil in a cool, dark place away from direct sunlight. Essential oils are volatile and can degrade over time, especially if exposed to heat or light. A properly stored bottle typically lasts 6 to 12 months before the scent and potency begin to fade.

Price varies widely depending on the source and purity. Cheaper oils may be diluted or adulterated, while very expensive ones are not necessarily better. Mid-range options from established essential oil companies are usually a safe choice.

Frequently Asked Questions

Will peppermint oil regrow hair I have already lost?

The small amount of research available suggests peppermint oil may support hair growth and thickness, but it is not proven to regrow hair that has already fallen out. If hair loss is a concern, talk to a doctor to identify the cause, which could be genetics, hormones, stress, or a medical condition.

Can I use peppermint oil if I have a sensitive scalp?

Peppermint oil can irritate sensitive skin. Start with a very dilute mixture (1 drop per tablespoon of carrier oil), test it on a small patch of scalp, and wait 24 hours before using it more widely. If any irritation develops, do not use it.

How long does it take to see results?

The one human study that measured results used peppermint oil for three months before seeing changes in hair thickness. If you try it, give it at least that long. Hair growth is slow, and results vary widely between people.

Is peppermint oil safe to use with other hair products?

Yes, you can use peppermint oil alongside shampoo, conditioner, and other hair products. Just make sure the peppermint oil is diluted in a carrier oil before explore it to your scalp, and rinse thoroughly after leaving it on.

What is the difference between peppermint essential oil and peppermint extract?

Essential oil is a concentrated extract made through steam distillation or cold pressing. Peppermint extract is usually made by soaking peppermint leaves in alcohol. Essential oil is much more concentrated and potent, so it requires more dilution before use on skin.