question: Hello doctor, My hair has been dry and brittle and falling out for the past year, but it seems that I have been losing my hair for longer. I do have seborrheic dermatitis on my scalp, but I have had it under control for the past two months. I am only 27, and I am a picky eater, so I know my diet is not high, I also get around four to five hours of sleep and average two glasses of water a day. Could this be affecting my hair, or is it MPB?