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Hair Care

Hair care advice grounded in trichology and dermatology research — covering routines for every hair type, science-backed treatments, and independent product reviews.

Quick Answer

How do I figure out my hair type and routine?

Identify your hair across three axes: texture (straight, wavy, curly, coily), porosity (low, normal, high), and density (fine, medium, thick). A simple routine has four steps — cleanse 1–3 times per week, condition every wash, hydrate weekly with a deep treatment, and protect from heat and UV. Match products to your specific combination, not generic 'all hair types' marketing.

Topics in Hair Care

Hair growth

What actually accelerates growth (and what doesn't), backed by research.

Damage repair

Bleached, heat-damaged, or breaking hair — the recovery roadmap.

Curly & coily

Curl method, moisture, definition, and protective styling.

Hair color

Bleach care, color longevity, salon vs. at-home, gray coverage.

Scalp health

Dandruff, sensitivity, oiliness, and scalp-related hair loss.

Styling tools

Heat protection, brush types, and how to choose tools.

All Hair Care articles

Frequently asked questions about hair care

How often should I wash my hair?
It depends on hair type and scalp oiliness. Fine, oily hair often needs washing every 1–2 days; medium hair every 2–3 days; thick or curly hair every 4–7 days. Over-washing strips natural oils and triggers more oil production. Co-washing (conditioner-only washing) extends time between shampoos for textured hair.
What's the truth about hair growth supplements?
Most marketed hair growth supplements show modest effects only when you have an underlying deficiency (iron, biotin, vitamin D, zinc, protein). If your blood work is normal, supplements rarely outperform a balanced diet. The strongest evidence supports addressing deficiencies, not loading up on biotin if you don't need it.
How can I make my hair color last longer?
Wash with cool water using a sulfate-free, color-safe shampoo. Limit washing to 2–3 times per week. Use UV protectant on color-treated hair before sun exposure, and rinse hair before swimming to reduce chlorine absorption. Glossing treatments every 4–6 weeks restore tone and shine between salon visits.
Is air-drying better than blow-drying for hair health?
Surprisingly, no — recent research suggests blow-drying with heat protectant on a medium setting at 6+ inches away causes less internal damage than prolonged air-drying, which leaves hair swollen with water for hours and weakens the cuticle. The best approach: rough-dry to 80% with cool air, then style.
Why is my hair suddenly shedding more?
Sudden shedding 2–3 months after a major stressor (illness, surgery, childbirth, severe weight loss, emotional stress) is called telogen effluvium and usually resolves within 6–9 months. If shedding lasts longer or is accompanied by visible scalp thinning, see a dermatologist or trichologist.

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