Hi. Greetings. Thinning of hair is becoming a common problem of youth now a days and can be attributed to early onset androgenetic alopecia as well as other factors such as nutritional deficiencies and work stress. Role of unhealthy lifestyle too is contributory. You'll need certain hair regenerative products or therapies and shampoos may just not be enough. Usually shampoos stay on scalp only for few minutes and that much period is not sufficient to being about a therapeutic action of hair thickening. You could come down for a consultation or meet a dermatologist near you. Let me know if u need any further assistance in this regard. Warm regards, Dr Govind S Mittal.