As far as I remember, the advice to get the baseline figures for thyroid and testosterone came from a discussion in which a member mentioned his discussion with his doctors post-treatment if his thyroid levels wrere “normal.” His doctors were of the view that the blood tests showed numbers that were in the normal range, but the member felt that it might not have been his normal pre-treatment. But at that point it was impossible to determine what his personal normal was as it was post radiation and if there was impact on his thyroid, it had already happened, hence the advice to get the baseline figures before treatment starts. I believe the same is possibly true with regard to the testosterone level. Unfortunately, this member (Charm) has since passed away. You might want to search the posts under his name or thyroid levels if you want to learn more.

My husband’s treatment did affect his thyroid level and he suffered from erectile dysfunction as well. He was put on a thyroid supplement post treatment and was given a prescription for Viagra.