Hair thinning like this often traces back to low iron stores or
vitamin D, even when
thyroid,
sugar and haemoglobin all test normal. A normal haemoglobin doesn't rule out low
ferritin specifically. Five months of heavy shedding usually comes from one of these drivers, not from the shampoo or hair products you've tried so far.
Next Steps
Ask specifically for a
ferritin and
vitamin D test, since these often get missed in a routine panel. Hair fall from these causes usually settles within a few months once the actual driver is corrected.
Health Tips
Please see a dermatologist or your gynaecologist for a full workup rather than relying on over-the-counter hair products without knowing the cause.