Shampoos wont help you treat gray hair and hait fall almost every shampoo contains varying quantities of chemicals even if it is labelled as organic or herbal . If u want to treat hair graying check your underlying cause whether it is stress hormonal imbalance or any other cause .
Next Steps
Go for a routine check up complete haemogram ,iron studies to rule out iron deficiency anaemia also start oiling your hairs on alternate days and shampoo your hairs with a mild shampoo and follow with a conditioner ,you can also use hair packs with curd to nourish your hair
Health Tips
To treat your condition visit a nearby qualified homoeopathic consultant for proper treatment , you can start taking 30 ml amla juice + 30ml wheatgrass juice + 2 tsp honey mixed in 1 glass lukewarm water for atleast a month to see changes in hair fall and graying