Apple cider vinegar (ACV) is commonly used as a home remedy for scalp concerns, especially dandruff, even though there is “no scientific evidence proving ACV treats dandruff.” Despite this, many people still try it based on online claims and personal experiences.

Some users report possible benefits, including “helping balance the scalp’s pH, supporting natural shedding of dead skin cells, and possibly reducing the growth of fungi that can contribute to irritation.” However, these effects are not scientifically confirmed and are based mainly on anecdotal reports rather than strong clinical research.

A 2022 review suggested ACV may be useful for scalp dryness, noting it “may help with dry scalp,” which is sometimes mistaken for dandruff because the symptoms can look similar even though the underlying causes are different. Researchers emphasize that more studies are needed.

ACV has also shown some antimicrobial and antifungal activity, but it does not affect all microorganisms equally. Its effectiveness can vary depending on dilution and the type of organism, which explains why results are inconsistent and why stronger scientific evidence is still required.

In practice, some people dilute ACV with water, apply it to the scalp for about 15 minutes, then rinse it out. It should always be used in a mild form, kept away from the eyes, and stopped if irritation occurs. Consulting a healthcare professional is recommended, especially for ongoing skin issues, since natural remedies have limits despite their popularity.