hair loss can be broadly classified as patchy or diffuse
from your description it seems to be diffuse , again be classified as
1. genetic and hormonal
called androgenic alopecia
2. non genetic due to -stress
, vitD, vitB12def, thyroid
you have been applying keto shampoo for last 3 years for dandruff which could have decreased your hair loss if this was the only reason.
since family history for hair loss is present it seems to be androgenic alopecia. for this we can use minoxidil
daily usually 5% for males and2% for females but result depends on how much loss has already occured.
fenestiride is prescribed in males which blocks hormones and reduces the loss
newer product saw palmeto has lesser side effects but these medicines should be taken with doctor's prescription.
in addition hair hygine, balanced diet, avoid stress.
can be considered if your doc advises you.
hope this adresses your concern