Hi, does anyone take this with underactive thyroid? Is it something that would affect Levo or would it be okay to take on night time? I did use to take this years ago for PMT but stopped it and thought would give it another go as it really helped. I'm little scared to take any vitamins just in case it stops my Levo working or it affects B12 injections. I do know I am okay for iron and vit C as currently having to take those per doctor and leaving 4 hrs before taking iron tablet as advised.