There are a number of reasons why someone’s hair might start to turn yellow, and it’s not always easy to determine the root cause. In general, though, there are three primary reasons why hair might discolor: a build-up of products, minerals or natural pigments in the hair shaft, or a medical condition.
If you’re using a lot of styling products, it’s possible that they’re starting to build up on your hair and causing it to yellow. Many hair products, especially those that are formulated to add shine or volume, contain …