Tiromel is a thyroid medication that contains liothyronine (T3 hormone). It is normally prescribed for people with hypothyroidism (low thyroid hormone levels). T3 is a very powerful hormone that increases the body’s metabolic rate. In bodybuilding, it is sometimes used during “cutting” phases to accelerate fat loss. Bodybuilders typically use it for: Increasing metabolism Burning fat faster while dieting Achieving a drier, leaner look before competitions Counteracting slower metabolism during certain steroid cycles It is commonly used: During contest prep In cutting/definition phases When trying to reach extremely low body-fat levels However, it carries significant risks because it directly affects the endocrine system. Possible side effects include: Muscle loss (not just fat loss) Rapid heartbeat / palpitations Heart rhythm problems Anxiety and tremors Insomnia Excessive sweating Suppression of natural thyroid function Long-term thyroid damage Increased cardiovascular risk