Which shampoo is best for hair fall: an evidence-led guide to causes, actives, and routine choices

Hair fall is one of the most common concerns people bring to dermatology and pharmacy, yet it can mean different things in different contexts. In everyday language, shedding of 50 to 100 hairs per day is normal, and most of this loss happens during the telogen, or resting, phase before new hair regrows. True hair loss, or alopecia, becomes a concern when shedding is excessive, persistent, or accompanied by changes in regrowth, scalp symptoms, or visible thinning. Medical causes include androgenetic alopecia (pattern hair loss), telogen effluvium often triggered by stress, illness, or nutritional gaps, alopecia areata linked to the immune system, and scarring forms from inflammation or traction. A dermatologist can assess pattern, pull tests, and scalp exam, and may order labs to identify reversible contributors such as deficiencies or thyroid imbalance.