The seborrheic dermatitis is a scalp condition that might become extremely dangerous if not treated on time, leading to temporary and even permanent hair loss. Of course you want to avoid this, especially if you are an adolescent, so you should try some of the shampoos that help you fight against it! For example, you can try an apple cider vinegar shampoo or the zinc shampoo that uses a natural punch in order to fight against the seborrheic dermatitis. Fenugreek Herbs, Sage and Thyme are used in this punch, together with a special form of zinc, the zinc PCA which is used in order to eliminate the symptoms. The problem is that your sebum gland either under produces scalp oil or over produces scalp oils, but the zinc regulates its function. The fungus that causes the unwanted dandruff mainly lives on the excess of scalp oils, so what you need is something to help the sebum gland regulate its function!