Hello
You need to use a good Paraben and sulphate free shampoo to prevent the hair from drying. Vicchy anti dandruff shampoo and vicchy dercos shampoo and conditioner are very good for everyday use .Dry hair also happnes when diet is poor in protein or low in
vitamin D and
vitamin B12 and iron in the blood.
Pls check this levels.
For protein take protein powder which is very safe.like MNO powder 1tbs in water and drink everyday.
For white hair very diff to stop as it is genetic but it can be slowed by taking tab Curlzvit once a day for 3o months
Hope this helps
Best
Dr Batul patel