Best Derm-Approved Ways to Treat Dandruff & Stay Flake-Free

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What is Dandruff?

"Dandruff is a very common, mild form of seborrheic dermatitis that affects the scalp and shows up as visible flaking, sometimes with itching or mild redness. At its core, it reflects inflammation and an accelerated turnover of skin cells on the scalp, which causes those cells to shed in larger, more noticeable clumps," Dr. Bowles shared.

"It is not caused by poor hygiene, and it is not contagious, but it is a chronic condition that tends to wax and wane depending on stress, weather, product use, and underlying scalp sensitivity," she added.

What causes dandruff?

"Dandruff is typically driven by a combination of factors, including an overgrowth of a naturally occurring yeast called Malassezia, excess oil production, and an individual inflammatory response. This yeast feeds on scalp oils and can trigger irritation in people who are more sensitive, leading to redness and flaking," Dr. Bowles said.

Additional contributing factors can include: "hormonal shifts, colder weather, stress, and certain hair products that disrupt the scalp barrier," which can create "an environment where inflammation and yeast overgrowth are more likely."

How to prevent dandruff

"Because dandruff is chronic and influenced by biology, it cannot always be fully prevented, but it can be well controlled. Consistent scalp care is key. That includes regular washing to reduce oil buildup, using targeted medicated shampoos when flares occur, and avoiding overly harsh products that strip the scalp barrier. Managing stress and being mindful of heavy styling products that sit on the scalp can also help reduce recurrence," said Dr. Bowles.

Best Shampoos for Dandruff

"With medicated dandruff shampoos, contact time matters. I usually advise patients to lather the product into the scalp and leave it in place for about five minutes before rinsing, which allows the active ingredients to penetrate and work effectively. Rinsing immediately may reduce their benefit. For non-medicated shampoos, prolonged contact is less critical," said Dr. Bowles.

Derm-Approved Dandruff Shampoo Ingredients

Dr. Bowles gave us a list of ingredients to look out for which should be in your dandruff treatment products:

• Ketoconazole: "reduces yeast overgrowth"
• Zinc Pyrithione: "has antifungal and anti-inflammatory properties"
• Selenium Sulfide: "slows skin cell turnover and reduces yeast"
• Coal Tar: "decreases scaling"
• Salicylic Acid: "helps lift and break down flakes"

"The right choice depends on the severity of symptoms and scalp sensitivity, but these ingredients are all evidence-based and commonly recommended in dermatology," she added.

Should you mix in non-dandruff shampoos into your routine?

Dr. Bowles advised, "It is reasonable to alternate a medicated dandruff shampoo with a gentle, non-medicated shampoo, particularly once symptoms are under control. During an active flare, however, I typically recommend using the medicated option more consistently to calm inflammation. Once improved, rotating in a mild, fragrance-light shampoo can help maintain scalp balance without over-drying or over-treating the skin."

Can washing your hair more help keep dandruff away?

"For many people, washing the scalp regularly can help reduce oil buildup and yeast growth, both of which contribute to dandruff. That said, “more” is not always better. Overwashing with harsh products can disrupt the scalp barrier and worsen irritation," Dr. Bowles said.

She added, "The goal is consistent, appropriate cleansing based on hair type and scalp oiliness, often every other day or several times per week, using a medicated shampoo as needed to maintain control."

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