Hi robheather!
People have a misconception that your hair falls out due to the RAI treatments. This is false. Your hair loss is due to your chemical imbalance in your body because of the antibodies attacking the thyroid.
While you may experience some hair loss, DianneW has posted in the past on how she lost some of hers and it came back once her thyroid levels were regulated.
I do hope this calms your jitters and gives you reassurance.
Best Wishes,
Jan
Online Facilitator,
NGDF