Is there an interaction between my thyroid medication (Synthroid) and the ingredients in my pre-workout?

Hello Ma'am,

No, there are no documented significant interactions between Synthroid and the products you mention. That said, we know very little about natural product interactions. Therefore, I recommend that you mention at your next blood test that you are taking these products. This way, we can see if your thyroid result will be affected (which remains unlikely in my opinion).

Good day,

Alexandre Chagnon, pharmacist