Product Name | L-Triiodothyronine |
Alias | T3 |
Chemical name | 3,3',5-Triiodo-L-thyronine, sodium salt |
CAS | 55-06-1 |
Einecs | 200-223-5 |
Molecular Fomular | C15H12I3NO4 |
Molecular Weight | 650.97 |
Molecular Structure | ![]() |
Purity | 99% |
Packing | foil bag or tin. |
Appearance | White or light yellow crystal powder |
Storage | Shading , confined preservation |
Usage | One of the thyroid hormones involved in the maintenance of metabolic homeostasis. Synthesized and stored as amino acid residues of thyroglobulin, the major protein component of the thyroid follicular colloid. |
The full name of T3 is triiodothyronine, and T4's full name is tetraiodothyronine or thyroxine. T3 and T4 control your body's metabolism. If you don't have enough of them, then your metabolism slows down. Your metabolic rate dictates how quickly you process food, how fast your heart beats, how much heat your body creates-and even how quickly you can think. In essence, T3 and T4 are in charge of how your body uses energy.
T3 and T4 are not equal in strength; T3 is the more active hormone of the two. While T3 is stronger, taking synthetic T4 hormone is considered the standard treatment for hypothyroidism. The reason for this is because most of the T3 in our bodies actually used to be T4. When T4 hormones come into contact with other cells in the bloodstream, they give up an iodine atom to interact with those cells. When T4 loses an iodine atom, it becomes T3.
When this T4 into T3 conversion occurs, T3 then conveys the metabolic "message" to the other cells throughout the body. The benefit of taking only T4 therapy is that you're allowing your body to perform some of the actions it is meant to do, which is taking T4 and changing it into T3. The half life of T4 is also longer compared to T3 (7 days versus 24 hours), that means that it will stay for a longer time in your body after ingestion.
T3 does speed fat loss. As a guideline, for most 12.5 mcg/day is a conservative "supplement" sort of dosing that seems to have no detectable adverse effect on thyroid function at all.
25 mcg/day is a "supplement" sort of dosing that does have some inhibitory effect.
50 mcg/day is a reasonably conservative bb'ing sort of dose that, of course, is more inhibitory.
75 mcg/day is getting into more of a problem area;
100 mcg/day in many cases leads to loss of muscle size and strength.
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