Our Thyroid Medication, Soy, and Your OPTAVIA program sheet provides information on how to successfully use OPTAVIA for individuals taking thyroid medication. We recommend discussing your medical conditions and weight loss plans with your doctor before starting the OPTAVIA Program.
If your doctor has prescribed thyroid medications like levothyroxine, you should understand that eating soy may slow down your body's absorption of these drugs. You should wait one to three hours before and after taking your thyroid medication before eating any Fueling containing soy protein—or choose a soy protein-free Fueling instead. Your doctor may want to monitor your thyroid hormone levels during your weight loss program.
For information on soy-free and soy protein-free Fuelings, please refer to our Product Claims Sheet.