To make a scalp cleanser, combine equal parts of apple cider vinegar and water are, according to Women's Health. One teaspoon of vinegar added to an application of shampoo also cleans well. To use either mixture, massage it into the scalp.
One cause of dandruff is malassezia, a fungus, according to Mayo Clinic. Although it is typically found on adult scalps, some individual's heads are irritated by it. The irritation leads to the production of extra skin cells. When these cells die and drop off, they show up as small white flakes. Apple cider vinegar helps prevent dandruff by fighting the fungus, reports Women's Health.
The pH level of a dandruff-covered scalp is not balanced, as observed by Women's Health. The scalp should have an acidic layer, and apple cider vinegar helps bring back the proper acid-base ratio.
In addition to cleaning the scalp, apple cider vinegar removes build-up on the hair, according to Women's Health. For this application, wash the hair with shampoo. Then, mix a cup of water with 2 tablespoons of vinegar. Pour the mixture over the head, and rinse it out completely. This concoction strips product residue away, leaving the hair clean. Vinegar also closes hair's cuticles so that light bounces off of it, making it shiny, according to the Huffington Post.