I've had higher TPO levels over the years and I've been on thyroid support groups and learned a lot. Stop The Thyroid Madness is a wonderful informative book and the author has a blog. There are many blogs actually on thyroid health and help.

I have been taking selenium daily now for some years 200-400mcg and have no clue with my TPO levels are today. I'm on Armour thyroid since 2002 and take daily iodine for thyroid support.

Fluoride does damage to our thyroids..... Do some research and learn more about your thyroid health. I did for many years....sluggish thyroid can cause some 66 health symptoms.