'Head and shoulders' is just a well-known shampoo for treating dandruff. It does have an effect on the hair scalp when applied, which reduces the loss of hair. Dandruff itself can actually cause some troubles for the head, making the scalp being itchy, thus resulting in thinning hair. It might not really affect the loss of your hair, though, but the application of good dandruff-like 'head and shoulders' helps to keep your hair for a longer time.
Dandruff makes your scalp weaker, which in turn can lead to the breakage of your hair. It leads to a weaker scalp, thus producing weaker hair. On the contrary, 'head and shoulders' shampoo helps to make your scalp healthy, leading to the better growth of strong, healthy, and long-lasting hair. As a matter of fact, there is a rumor that 'head and shoulders' shampoo causes hair loss. This is a myth! It does not; only help to protect and make your scalp and hair healthy.