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Personal Care

3 evidence-based guides on personal care — backed by clinical research and scored in our catalog.

Hair Loss: What Actually Works, What Doesn't, and When to See a Dermatologist

Minoxidil and finasteride have the evidence; biotin and growth shampoos don't. The types of hair loss, finasteride's real safety profile, laser devices, dandruff shampoos and red flags.

Hair LossMinoxidilFinasteride

Guide10 min read

Retinol vs Tretinoin: How Retinoids Work and What the Evidence Shows

Tretinoin, retinol, retinal, adapalene and bakuchiol compared on evidence, strength and irritation — plus how to start a retinoid, why sunscreen matters, and the pregnancy warning.

RetinolTretinoinRetinoids

Guide11 min read

Sunscreen Guide: SPF, UVA, How Much to Apply and What the Trials Show

The Nambour trial showed daily sunscreen cuts skin cancer and ageing. What SPF and broad spectrum mean, how much to use, mineral vs chemical filters, absorption, reef claims and babies.

SunscreenSkin CancerSkin Aging

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