After my first big flare, I noticed that my hair had thinned out considerably and had a lot more gray. Not sure if it was due to medications or the stress on my body- if your body can't support a major system like digestion, it's not going to make good hair a priority! The good news is that my hair got a lot better over time - I still have some gray, but not nearly as much. My hair also started growing back - you know how pregnant women get that "halo" of baby hair all around their hairline? That's what I have...hahaha.