Book Two of the Trilogy
Rooted
The Hidden Science of Textured Hair and the Scalp
Haircare has spent decades solving the wrong problem. Rooted replaces the hair-typing chart with the biology that actually determines whether hair thrives or fails.
Inside the book
The industry organised itself around the Andre Walker hair typing system, the fourteen-category chart from straight Type 1 through coily Type 4C that a stylist devised in the 1990s. That chart did real good in its time: it gave a name to textures the industry had previously ignored. But it was built to describe how hair looks, not how hair works.
The book relocates attention from the visible fibre to the scalp that makes it. Functionally, the scalp is mostly follicle with skin in between: a square centimetre carries roughly ten times the follicle density of most other body sites, each follicle a self-contained mini-organ with its own sebaceous gland, blood supply, immune cell population and stem-cell reserves.
Its most important practical idea is that scalp damage is silent. Oxidative stress and micro-inflammation build for years below the threshold of visible symptoms, quietly depleting stem cells and shrinking the dermal papilla. By the time hair loss is visible, the underlying process has often been running for a decade.
The book’s original scientific contribution is the Inflammation Paradox: the same features that make melanin-rich skin more resilient elsewhere on the body become, inside the unique tissue context of the hair follicle, the infrastructure of vulnerability. Same biology. Different tissue. Opposite outcome.
The evidence
Two people with identical curl patterns can have entirely different follicle architecture, keratin chemistry, scalp inflammation and microbiome, and therefore need entirely different care.
Central centrifugal cicatricial alopecia affects an estimated three to six percent of middle-aged Black women and is rare elsewhere. Traction alopecia affects roughly one in three women of African descent.
Published in Cosmetics: textured hair thinned almost twice as fast as straight hair under identical oxidative stress. Pre-treatment with the PhytoProtect blend substantially preserved fibre thickness at the molecular level.
Core themes
Scalp biology · Hair follicle biology · Inflammation · CCCA · Traction alopecia · Chemical and chlorine damage · Hair ageing · Scalp microbiome