Does quercetin affect thyroid?
Moreover, can quercetin cause hypothyroidism?
Excessive intake of quercetin has the potential of interfering with thyroid function. Quercetin acts as a thyroid disruptor by inhibiting thyroid-cell growth and iodide uptake due to down regulation of sodium/iodide symporter gene expression.
Then, what supplements should not be taken with thyroid medication?
Yes. Calcium supplements — or antacids containing calcium — can interfere with the absorption of thyroid hormone replacement medications, such as synthetic thyroid hormones levothyroxine (Synthroid, Unithroid, others) and liothyronine (Cytomel), as well as thyroid extract supplements.
Quercetin is generally considered safe. Very high doses of quercetin may damage the kidneys. You should take periodic breaks from taking quercetin. Pregnant women, breastfeeding women, and people with kidney disease should avoid quercetin.