Pack: 50 tabs (25-200 mcg/tab)
Levothyroxine – also known as T4 – is a naturally occurring hormone produced by the thyroid gland.
Levothyroxine is the thyroid hormone, which is produced directly by the thyroid gland, whereas the thyroid hormone liothyronine (T3) is made in the body by enzymatic transform of the thyroid hormone levothyroxine.
The task of thyroid hormones in the body include in the regulation of losing fat, carbohydrates and protein. This means thyroid hormones are in charge of the munber of the metabolic turnover, which is burned in the resting state during a given period of time.
Many women and bodybuilders resort to thyroxin use as means for weight loss. Thyroxin has powerful fat-burning effect, increases an expense of calories and accelerates metabolism. Its popularity decreased in connection with a negative impact on heart recently, thyroxin has adrenalin like effect, forcing heart to fight more often, and together with it causes feeling of nervousness and concern which aren't really well transferred.
However many side effects can be eliminated if to combine thyroxin and beta-blockers. Beta-blockers inhibit receptors by means of which thyroxin influences heart, thus, they prevent a negative impact of a thyroxin on heart, normalize a rhythm and reduce manifestation of some other side effects of thyroxin.
Many consider thyroxin can be irreversible to suppress function of an own thyroid gland, however in researches was shown that even high doses of medicine in 3 weeks of acceptance reduce secretion of own hormones only by 20%, at the same time in 4 weeks secretion returned to a regulation.
Benefits of thyroxin: high availability and efficiency. Shortcomings of thyroxin: rather large number of side effects, however it is possible to prevent many of them.
In bodybuilding, athletes speak of dosages between 200 – 400 mcg / day when levothyroxine is used for diet support
The dosage usually begins at 100 mcg / day, is increased by 25 or 50 mcg / day every 1 – 2 days until the maximum dose of administration is reached.
At the end of the course, the dose is slowly lowered. Every 2-3 days the dosage is reduced by 25 or 50mcg / day (to zero).
It is important, That the dosage is slowly increased when starting and decreased when ending the cure so the thyroid gland will be adjusted smoothly.
Levothyroxine intake usually lasts 4-6, maximum 8 weeks.