I have tried several but these two were my favorite. From Wholefoods I got Gaia Herbs Thyroids Support. From the Vitamin Shop I got Thyroid Health Formula by Dr. Michael Murray Formulated.
Total Alcohol Free Extracts: L-Tyrosine, Coleus root (Coleus forskohlii), Ashwagandha root (Withania somnifera), Schisandra Berry (Schisandra chinensis), Kelp fronds (Laminaria digitata), Bladderwrack frond (Fucus vesiculosus).
Thyroid Health Formula contains:
Pantothenic Acid (as calcium pantothenate), Iodine (as potassium iodide), Copper (as copper gluconate), Manganese (as manganese citrate), L-Tyrosine,
Ashwagandha (Withania somnifera), powdered extract 5:1 (root) (standardized to contain 1.5% withanolides), Guggul (Commiphora mukul), powdered extract 3:1 (gum resin) (standardized to contain 2.5% guggulsterones)
Source: Herbs for Thyroid Support Help