So, you can see why it may be beneficial to take a thyroid medication that replaces all or at least the two most important (T3 and T4) of these thyroid hormones in the case of hypothyroidism. Your body produces all of these hormones itself but some of the T4 produced by the thyroid is also converted into that very important T3 and T3 is the active thyroid hormone the one that gives you energy and removes most hypothyroid symptoms. Because of this, it’s said to be effective in the prevention of osteoporosis. It acts to lower levels of Calcium in the blood and stops the release of more Calcium from your bones into the blood. Calcitonin: This is secreted from the thyroid when blood levels are high in Calcium.T4: This is a ‘pro-hormone’ (as a precursor of T3, having minimal hormonal effect itself).T4 is referred to as the ‘storage hormone’ and its main function is to convert to T3, both active T3 and Reverse T3. T3 is said to be linked to mental health, ability to coping with stress and emotional stability. T3: Referred to as the ‘active hormone’, T3 has the greatest effect on the body’s energy levels and overall health and well-being.It also likely has an impact on metabolism and burning fat and is effective in increasing liver metabolism and that of the heart. T2: This likely plays a role in converting T4 to T3.T1: This is thought to play a role in keeping your thyroid function in check and is also believed to influence heart health.To understand the different options, let’s start by looking at the thyroid hormones you body produces (or at least, would do if it had a well-functioning thyroid!): Originally published on 24th March 2016 Last updated on 22nd March 2022ĭid you know that there are multiple medication options for hypothyroidism?Ĭould a change in medication change your life? As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links, to find out more information, please read my disclosure statement.