L-Thyroxine:
L-Thyroxine is a synthetically manufactured thyroid
hormone. Its effect is similar to that of natural L-thyroxine
(L-T4) in the thyroid gland. L-thyroxine is one of two hormones
which is produced in the thyroid. The other one is L-trliodthyronine
(L-T3, see Cytomel). Lthyroxine is clearly the weaker of the two
hormones. For this reason it is often used for a longer time period
than L-T3. Bodybuilders use L-Thyroxine to accelerate the metabolizing
of carbohydrates, proteins, and fat. The body burns more calories
than usual so that a lower fat content can be achieved or the
athlete burns fat although he takes in more calories. In the past
L-Thyroxine was often used by competing bodybuilders. Unfortunately,
with increased dosages (more than 400 to 600 mcg/day) usually
not only more fat but more carbohydrates and proteins are burned
as well. The athlete no doubt becomes harder but he can also lose
muscle mass if steroids are not administered simultaneously. L-Thyroxine
is rarely used today since most athletes use Cytomel or Triacana.
When used properly there are few side effects to L-Thyroxine.
Dosages that are too high and, in particular; dosages that are
increased too quickly and too early at the beginning of intake
can cause trembling of the fingers, excessive perspiration, diarrhea,
insomnia, nausea, increased heartbeat, inner unrest, and weight
loss.
The dosages taken by athletes are usually in the range of 200-40q
mcg/day. We advise that you begin with a small dose and increase
it slowly and evenly over several days. L-Thyroxine is a prescription
drug and available only in pharmacies. One hundred tablets of
150 mcg each of the compound Levothroid cost about $50 on the
black market. One hundred tablets of 200 mcg each of Synthroid
by the Boots Company usually cost about the same. Unlike Cytomel
and Triacana, L-Thyroxine is rarely found on the black market. |
