T3 Conversion Booster is a specialized formula which contains 10 unique and specific ingredients designed to help support the 3 critical thyroid pathways: 1) Peripheral thyroid conversion - This pathway is what converts your inactive thyroid hormone T4 into the active thyroid hormone T3. This pathway can be blocked or slowed down which may result in low levels of T3 and high levels of reverse T3. 2) Thyroid cellular sensitivity - In order for thyroid hormone to work it must activate your cells and this is known as cellular sensitivity. Certain deficiencies impact how sensitive your cells are to thyroid hormone. 3) Thyroid hormone biosynthesis - Up to 13 nutrients are required to produce thyroid hormone and low levels of these nutrients may negatively impact how well you can produce thyroid hormone. These ingredients help at each process and may help reduce inflammation, support thyroid conversion and increase T3 levels. T3 Conversion booster is ideal for those with Hashimoto's thyroiditis, those people with low thyroid function, those who are post thyroidectomy, and those who have had radioactive iodine ablation.