I had non Hodgkin's lymphoma about 2.5 years ago and went through 6 chemo treatments. All test says I am cancer free. At first my hair fell out and after I finished my treatments it came back nicely ,but a few months later it started falling out again and still falling out to the point of very thin on the top and sides. I am taking thyroid meds and I don't think that would be the problem.(levothyroxin 88mcg 1 daily. I have that checked once a year..I am also taking Xanax once a day. I take Metforman 4 a day. I also started taking Biotin 5000 mcg.