Barry Peatfield, author of Your Thyroid, and
How to Keep it Healthy, stresses that the fluoride content of tea
means that you should avoid drinking black, white <span style = 'background-color: #dae8f4'>and</span> green
tea in the morning, and
may want to consider giving it up altogether. Fluoride was used in the past as a treatment for hyperthyroid conditions, so effective is it in "slowing" the thyroid and
Calcium, iron, and
soy-based formulas will bind with thyroxine and
prevent it from being absorbed.