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Evidence-based dispatches on scalp health, formulation transparency, and follicle-level biology. What is actually in your hair care — and what the science says really works. No hype, no affiliate links.
What arrives in your inbox
Ingredient audits, in plain language
One product, its full INCI list, and what the current evidence actually says about each active. No shortcuts.
Follicle-level scalp biology
How the scalp actually works — and why so much marketing gets it wrong. Grounded in trichology, not trends.
Long-term efficacy, not launch hype
What holds up over months of real use — separated from the claims on the bottle.
Free, and independent
No sponsored reviews, no affiliate links. Just the research, translated. Leave anytime.
Written by
Sadie is a hair care writer and independent researcher focused on scalp health, formulation transparency, and evidence-based trichology. She focuses on formulation mechanisms, long-term product efficacy, and follicle-level scalp biology. Through her newsletter and long-form reviews, she helps readers understand what is actually in their hair care products — and what science says really works.
A few questions
There is no fixed schedule. A note goes out when there is something genuinely worth reading — never to fill a calendar.
Completely free. No sponsored reviews, no affiliate links. The research stands on its own.
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