Active substance: Thyroxine
Common names: Levothyroxine, t4, thyroxine, Synthroid, Levoxyl, Unithroid, Levothroid, and Euthyrox
Levothyroxine, also known as T4, is a natural hormone produced by the thyroid gland. It regulates the burning fat, carbohydrates, and protein in the body. Comparing to T3, biological activity is 4-5 times less but hormonal levels remain more stable. And it better in appetite suppression, an increase of physical durability, and less need for sleep.
Bodybuilders use it during the mass phase of the cycles when it is most needed to burn calories effectively and increase metabolic turnover. And for pre-competition cycles or bodybuilding show to get better relief.
Levotiron Side effects:
The side effects are very rare but occur on big dosages.
- Hair loss
- increased sweating
- sensitivity to heat
- mental/mood changes
- shortness of breath
- bone pain
- easily broken bones
- Start with a low dosage, about 25 mcg, and increase it every 1-3 days by 25 mcg until you reach to the desired dosage. Before the cycle ends, you need to lower the dosage step by step.
- Length: 4-6 weeks, max 8 weeks.
- Max dosage: 400 mcg per day.