What should I do to prevent hair loss ?

i think first of all as you told your hairs are dry first do something for that and most of the time dry hairs are prone to fall and break. i think the best way to prevent this at home is using coconut oil most of the times and overnight and washing the hairs using a shampoo which gives a soft effect to your hairs and dont leave them dry. as i am from india i use sunsilk and i think pantene and head and shoulders is available in most of the places and even those are good but i would recommend if you would able to find the shampoo with egg flavoured it works best for hairs you can try that, but i would also recommend before every wash of your hairs everytime make sure that your hairs are oiled coz everytime it happens thnat if you wash the hairs which are not oiled it becomes dry. for diet i think you need to increase drumsticks, onions are basic trusted ones. i dont know if you are anaemic it effect your hairs or not. if doing all this also doesnt help you then you need to consult the doctor for hair fall.