What makes Head and Shoulders bad is the active ingredients in head and shoulders shampoo which include zinc pyrithione and selenium sulfide which can cause some negative effects on hair, especially when used too much or not used properly.
The zinc pyrithione and selenium sulfide in head and shoulders shampoo can cause hair breakage, hair dryness and possible damage to colored hair when used too much or used improperly.
Although when used as directed the Head and Shoulders shampoo is generally safe for most hair.
If you use too much Head and Shoulders shampoo, it can cause your scalp to dry out and result in itchiness, irritation and increased dandruff as well as possible small amounts of hair loss due to the damaged hair and dried out hair.
Using too much Head and Shoulders shampoo can also strip away the natural oils and make your hair dry, brittle and even more prone to breakage.
Head and Shoulders shampoo does not cause hair thinning, although if you use Head and Shoulders shampoo too much, your hair could become very dry and can get brittle which could lead to some hair loss but it's not because of the Head and Shoulders shampoo itself.
There is nothing in the head and shoulders shampoo that could cause hair loss.
Head and Shoulders shampoo can actually improve your scalp health which is important for healthy hair growth.
The antifungal ingredient in Head and Shoulders shampoo is zinc pyrithione and the active ingredient in some Head and Shoulders shampoos such as the Clinical Strength Head and Shoulders shampoo is selenium sulfide which helps to fight dandruff.
Selenium sulfide is the active ingredient that is used in the strongest head and shoulders dandruff shampoo.
When using dandruff shampoo including Head and Shoulders dandruff shampoo you need to also allow the dandruff shampoo to sit in your hair and on your scalp for a couple of minutes before rinsing it out.
Allowing the dandruff shampoo to sit on your scalp and in your hair for a few minutes allows the active ingredients in the dandruff shampoo to work on the scalp effectively to loosen the dandruff flakes.
Most of the dandruff shampoos also recommend that you leave the dandruff shampoo on your scalp and hair for 3 minutes to 5 minutes.
Then after you allow the dandruff shampoo to sit for a few minutes or so you can then rinse it out.
The active ingredients in the dandruff shampoo target the root cause of the dandruff, like fungal overgrowth or excessive shedding of skin cells.
Leaving the dandruff shampoo in your hair and on your scalp for a few minutes allows the active ingredients in the dandruff shampoo to penetrate your scalp and address the underlying cause of the dandruff.
After you do allow the dandruff shampoo to sit, you can then thoroughly rinse the dandruff shampoo from your hair as well as your scalp to remove any loosened dandruff flakes and shampoo residue.
It's also good to follow up with a moisturizing hair conditioner after you use the dandruff shampoo, which can keep your hair moisturized as dandruff shampoo can sometimes dry out your hair.
Also while you're waiting and allowing the dandruff shampoo to work on your hair you should gently massage your scalp to help loosen the dandruff flakes and also improve circulation.