“Nature-Throid is a hypoallergenic combination thyroxine (T4) and triiodothyronine (T3) hormone replacement drug made from Thyroid
USP. Nature-Throid is formulated using hypoallergenic inactive ingredients and does not contain any artificial colors or flavors, corn, peanut, rice, gluten, soy, yeast, egg or fish/shellfish.”
I notice is doesn’t say what it DOES contain, just what it doesn’t.