I am deciding whether or not to have a total thyroidectomy. I have multinodular goiter and the dominant nodules on each lobe keep growing. On left is 1.5cm and the righ 2.5cm and also many smaller ones. I had an FNA on the dominant ones. Left side benign. Right side non-diagnositc. I have high homocysteine levels due to the MTHFR genetic mutation and was wondering if the medication I would have to be in would increase my homocysteine even more?