Egg yolk does have some mild cleansing properties because it contains lecithin and other phospholipids, which can help lift some oil and dirt from the hair. This is why some people enjoy using it as a natural hair cleanser. However, egg yolk is a very gentle cleanser and may not remove enough oil, product buildup, or other residues from the scalp on its own. Over time, if the scalp isn't cleansed thoroughly enough, buildup can accumulate, which may affect overall scalp health. Also, egg yolk can attach a bit too much to the hair and not wash out completely, which adds to the risk of buildup. If you are using styling products, conditioners, or other hair treatments, we wouldn't recommend this kind of cleansing method, as it won't be cleansing enough. And don't forget: whichever gentle cleansing method you use, always include in your routine a deep cleanse from time to time to remove all residue on your hair and give it a fresh start. If you're looking for a gentle, natural alternative, the homemade shampoo taught later in the 14-Day Challenge is a great option. It cleanses more effectively than egg yolk while still being gentle on both the hair and scalp, making it suitable for regular use without being overly harsh.