Why does no two heads of hair behave the same way, even with the same products?
Hair is not a beauty product; it is biology. Every strand is a thread of protein made by a follicle, wrapped in a
cuticle of oil, and shaped by the genes of a particular corner of the world. Hair from East Asia, Europe, and
sub-Saharan Africa are not three styles but three different biological structures, with different chemistries,
>For thirty years the dominant framework has been a 1990s stylist's chart of fourteen
categories with no underlying biology and no published evidence base used anyway by almost every brand you
have heard of. Calm, rigorous, and written for the way real people live with their hair, Rooted is the book your
hairdresser, your dermatologist, and the back of your shampoo bottle should have given you years ago.
Inside this book, you will learn:

• Why hair that looks healthy in the morning can feel ruined by the afternoon.
• Why a single chlorinated swim can do more damage to some hair than a year of normal use.
• Why the same conditioner can transform one head of hair and weigh another one down.
• Why hair loss looks different on different people, and why the early signs are missed for years.
• What is happening on your scalp - the most under-studied piece of skin on your body.