My Thyroid blood test shows I m low. Take thyroid due to having had Thyroid cancer; thyroid gland removed. Have many food allergies, yellow dye for, osteoporosis, asthma when exposed to certain allergens, a bit of AFib. Tirosint has Levothyroxine, which has yellow dye and I ve read is not good for some of my conditions. I have been taking NatureThroid, and it s not keeping my levels good. Synthroid s first ingredient is Acasia, which I m also allergic to - breathing challenges. Any suggestions. Thank You