Alias: T3 Sodium Salt, T3, Na, O-[4-Hydroxy-3-Iodophenyl]-3,
5-Diiodo-L-Tyrosine Sodium Salt, Liothyronine Sodium, Liothyronine
Sodium Salt, H-Thy(3, 3′, 5-I3)-Ona
Alias: Cytomel T3; 3, 3′, 5-triiodothyronine sodium
CAS No: 55-06-1
Einecs No: 200-223-5
Appearance: White or light yellow powder, almost tasteless.
Usage: One of the hormones produced by the thyroid gland that is
involved in the maintenance of metabolic homeostasis. Also produced
in peripheral tissues as the active metabolite of Thyroxine.
Triiodothyronine, also known as T3, is a thyroid hormone but not an
anabolic steroid . It affects almost every physiological process in
the body, including growth and development, metabolism, body
temperature, and heart rate.It is used medically to treat cases of
thyroid insufficiency, obesity, certain metabolic disorders and
fatigue.Bodybuilders are particularly attracted to this drug for
its ability to burn off body excess fat. Most often utilized during
contest preparation, one can greatly decrease the amount of stored
fat without being forced to severely restrict calories.
Production of T3 and its prohormone thyroxine (T4) is activated by
thyroid-stimulating hormone (TSH), which is released from the
pituitary gland.T3 in the body is responsible for regulating the
uptake of various nutrients into cells and into the mitochondria of
those cells in order to effectively become utilized for the
production and consumption of energy.
Liothyronine is the most potent form of thyroid hormone.
Chemically, it is nearly identical to T3. As such, it acts on the
body to increase the basal metabolic rate, affect protein synthesis
and increase the body’s sensitivity to catecholamines by
The thyroid hormones are essential to proper development and
differentiation of all cells of the human body. These hormones also
regulate protein, fat, and carbohydrate metabolism, affecting how
human cells use energetic compounds.It usually used as treatment of
depressive disorders and as a fat loss supplement.
There are 2 ways to dosing T3.
In the first way, the goal is to achieve an ongoing edge in fat
loss or to help maintain a near-personally-ideal body composition.
In this approach, T3 dosing is very low, preferably 12.5 mcg/day
but in some cases as much as 25 mcg/day. At the lower end of this
range, typically thyroid testing will show no detectable
suppression even with prolonged use. At the higher end, moderate
suppression is sometimes seen, but results are superior to when T3
is not taken, and the suppression reverses rapidly upon
discontinuing T3 use.
In the other way, the goal is to achieve a quite substantial
increase in rate of fat loss, at the known cost of inducing thyroid
suppression. Most preferably the dosage is about 50 mcg/day, but in
some instances can be as high as 75 mcg/day. Such use is preferably
not ongoing, but only for a limited period of time such as 8-12
weeks, though there’s no exact requirement for timeframe.
T3 is a very effective compound for aiding fat loss, but has
serious side effects when overdosed. With proper care, it’s an
easily-cycled compound. Because T3 has limited stability, it’s best
sourced from quality pharmaceutical products, with a second choice
being Third World generics or relatively-fresh powder which has
been carefully measured. Liquid products can lose potency rapidly
and therefore are not preferred.