Scalp Oxygenation: How Oxygen Really Reaches Your Hair Follicles

Scalp oxygenation is a popular label on shampoos and salon treatments. This guide explains how oxygen really reaches your skin and hair follicles, what the research shows, which claims hold up, and...

Estrogen Receptor Polymorphisms and Hair: What the Genetics Show

Estrogen receptor polymorphisms are common variants in the ESR1 and ESR2 genes. This guide explains what research has found about them and female pattern hair loss, why the studies disagree, and wh...

Female Pattern Hair Loss: Signs, Stages and What Helps

Female pattern hair loss is a gradual, patterned thinning across the top of the scalp, and it is the most common long term cause of thinning in women. This guide covers the early signs, how it diff...

Follicular Unit Density: Why a Hair Transplant Can Look Sparse

Follicular unit density, the number of natural 1 to 4 hair groups per square centimetre, shapes how full a hair transplant can look. This guide explains donor limits, why new transplants look spars...

Zinc for Hair Loss: Does It Help and How Much to Take

Zinc for hair loss is often sold as a quick fix, but most adults get the zinc they need from food. This guide covers NHS daily amounts, the 25mg supplement limit, what the research on zinc and hair...

Follicle Dormancy: What a Resting Hair Follicle Really Means

Follicle dormancy usually means the normal resting phase of the hair cycle, which lasts about three months. This guide explains how it differs from pattern and scarring hair loss, what triggers mas...

Gender Affirming Dermatology: Skin, Scalp and Hair Changes

Gender affirming dermatology covers the skin, scalp and hair changes that come with transition. This guide explains how hormones affect oiliness, body hair and scalp thinning, how to get help in th...

Scalp Care Under a Helmet: Stop the Itch, Spots and Breakage

Helmets trap heat, sweat and friction against the scalp, which is why riders and site workers get itching, strap line spots and snapped hairs. Here is what scalp care under a helmet actually involv...

Bioidentical HRT: Regulated vs Compounded, and Your Hair

Bioidentical HRT uses hormones identical to the ones your body makes, but the British Menopause Society separates regulated products from compounded ones it does not recommend. This guide explains ...

Anagen Telogen Ratio: What Your Hair Cycle Tells You

Your anagen telogen ratio is the balance of growing to resting scalp hairs, about 85 to 15 in a healthy scalp. This guide explains what shifts it, why shedding shows up months after a trigger and w...