Hair loss in women most commonly results from hormonal changes, chronic stress, nutritional deficiencies, or scalp inflammation. Scalp inflammation is particularly common after 40, as falling oestrogen levels reduce the scalp's natural anti-inflammatory protection, making follicles more vulnerable to DHT-driven miniaturisation.
Female hair loss is almost always multifactorial — triggered by hormonal shifts, amplified by scalp inflammation, accelerated by oxidative stress and nutritional factors. The most under-recognised link in the chain is scalp inflammation, which is what makes follicles vulnerable to every other cause.
Oestrogen protects hair follicles. It has an anti-inflammatory effect on scalp tissue and prolongs the anagen (growth) phase of the hair cycle. As oestrogen declines in perimenopause and menopause, that protection disappears. DHT — the androgen linked to follicle miniaturisation — becomes relatively more dominant. The result: hair follicles shrink, hair grows thinner and shorter each cycle.
Chronic low-grade inflammation in the scalp creates a hostile tissue environment. It increases follicle sensitivity to DHT (even at normal DHT levels), shortens the growth cycle, and eventually drives follicles dormant. This process often starts years before visible thinning. It's upstream of every other cause — and almost never treated directly.
A sudden large-scale shed triggered by a physiological shock: major illness, surgery, childbirth, extreme stress, rapid weight loss, crash dieting, or starting/stopping certain medications. Normally temporary (3–6 months), but can become chronic if the trigger isn't resolved.
Genetically determined sensitivity to DHT in certain follicles. In women, this typically presents as diffuse thinning at the crown and a widening part rather than the receding hairline pattern seen in men. Inflammation makes follicles more sensitive to DHT — so even genetic FPHL has an inflammatory component.
Iron deficiency (particularly ferritin below 70 ng/mL) is the most clinically significant nutritional cause of hair loss. Vitamin D, zinc, and B vitamins also play supporting roles. Biotin deficiency is rare and rarely the cause of hair loss in otherwise healthy adults despite being heavily marketed.
Both hypothyroidism and hyperthyroidism can cause diffuse hair shedding. The hair loss is usually reversible once thyroid levels are normalised. Worth testing if hair loss is accompanied by fatigue, weight change, or temperature sensitivity.
Alopecia areata, lupus, and other autoimmune conditions can cause patchy or diffuse hair loss. These require medical diagnosis and are distinct from the more common inflammatory/hormonal pattern.
Key point: Most of these causes interact. Stress raises cortisol, which promotes scalp inflammation. Inflammation makes follicles more DHT-sensitive. Hormonal decline removes anti-inflammatory protection. They compound each other — which is why addressing the inflammation layer often improves outcomes even when other causes are present.
ThriivX H3 targets scalp inflammation — the tissue-level cause that makes follicles vulnerable to everything else.
Shop ThriivX H3 →Most supplements address nutrient deficiency. ThriivX H3 addresses scalp inflammation — the upstream trigger that's driving follicle miniaturization.
Get ThriivX H3 →Results vary. Consult your physician before starting any supplement.