“…So a lot of these oils that are purported to be good for our health are actually quite thyroid toxic and long-term use could lead to conditions that are common in low thyroid and is as detrimental as cancer. Yeah. And there's one which isn't really a fatty acid, but it's a highly unsaturated molecule, carotene, which is the precursor to vitamin A. It not only blocks the cellular sites that use vitamin A, but as a polyunsaturated molecule, it also blocks the thyroid function every place that the vegetable oils do.”