Hello....
There can be other reasons for your weight loss.... Please consult your Family Physician or some Good Homoeopath nearby who will examine you and advise needful investigations to reach the diagnosis of weight loss....
Start with
D supplement.....
For hairfall.... eat Almonds, Walnut, Coconut, Flax seeds, Sesame seeds, Figs...etc...which are rich source of
Vitamin required for hair....
Drink min 2litres of water Daily...
Stop non veg, alcohol....
Also doing Pranayam Yoga regularly will help.