Reports suggest that certain shampoos can help with hair growth, with some outlets citing a list of 11 effective products. However, there is some discrepancy in the number of recommended shampoos, with one outlet listing 9 and another mentioning 13 dry shampoos for fine hair. The shampoos in question have been tested by various individuals, including beauty editors, trichologists, and a large group of people, with some outlets claiming they can reduce shedding and boost growth.