Can Dandruff Shampoo Help with Hair Loss? Here’s What the Science Says.
You've probably seen the viral claim: using dandruff shampoo can help with hair loss. But is it true? Let's break down the facts—and the fiction.
The Study Behind the Claim
The buzz stems from a 1998 study titled "Ketoconazole shampoo: effect of long-term use in androgenic alopecia." This nearly 30-year-old study examined the effects of 2% ketoconazole shampoo on androgenic alopecia (genetic hair loss) in men aged 21–33. Out of 39 participants, 27 used the shampoo 2–4 times per week for 21 months.
The results? Researchers concluded that ketoconazole may improve the appearance of androgenic alopecia, but emphasized that further study is necessary.
What Is Ketoconazole and How Does It Work?
Ketoconazole is an antifungal ingredient commonly found in anti-dandruff shampoos, like Nizoral, which contains 1% ketoconazole and is available over the counter. It's believed to help with hair loss by:
Acting as an anti-inflammatory
Blocking DHT (a hormone linked to hair thinning)
This makes it potentially helpful for people experiencing genetic (aka androgenetic or male/female pattern hair loss) or other inflammatory-related hair loss and scalp conditions.
What Should You Consider Before Using Ketoconazole Shampoo?
If you’re considering trying it, keep these tips in mind:
When using, leave it on your scalp for 3–5 minutes before rinsing.
Be cautious with long hair—ketoconazole can be drying, so follow with a moisturizing conditioner or hair mask.
You may want to avoid if you have a dry or sensitive scalp, as it may cause irritation or worsen scalp imbalances.
Final Thoughts
While the evidence is limited and based on a small study, ketoconazole shampoo could be a low-risk, affordable option to try for those dealing with hair loss—especially if dandruff or inflammation are also present.
