Effect of Soy Intake on Cardiovascular Disease Biomarkers in Subclinical Hypothyroid Participants

Inclusion Criteria: * Patients with subclinical hypothyroidism (otherwise healthy volunteers) * Adults aged 25 - 70 yrs. * Willing to avoid consumption of soy/other isoflavone containing foods (i.e. some snack bars) during the study. * Willing to avoid consumption of dietary (other than multivitamin) and herbal supplements during the study. Exclusion Criteria: * Taking drugs that interfere with thyroid function * Planning pregnancy in the next 6 months * Taking drugs that lower lipids, blood pressure, or sensitize insulin * Regular consumption of soy products (\>20 g/wk) * Consumption of soyfoods within 90 days prior to enrollment. * Known history of soy or milk allergy or intolerance. * Taking antibiotics during the intervention * Active viral infections such as Human immunodeficiency virus (HIV) positive or hepatitis