Levothyroxine is a synthetic (man-made) version of the principle thyroid hormone, thyroxine (T4) that is made and released by the thyroid gland. Thyroid hormone increases the metabolic rate of cells of all tissues in the body. In the fetus and newborn, thyroid hormone is important for the growth and development of all tissues including bones and the brain. In adults, thyroid hormone helps to maintain brain function, utilization of food, and body temperature, among other effects.
Levothyroxine is a thyroid medicine that replaces a hormone normally produced by your thyroid gland to regulate the body's energy and metabolism. Levothyroxine is given when the thyroid does not produce enough of this hormone on its own. Levothyroxine treats hypothyroidism (low thyroid hormone). It is also used to treat or prevent goiter (enlarged thyroid gland), which can be caused by hormone imbalances, radiation treatment, surgery, or cancer.

Applications of T4 L-thyroxine Levothyroxine
Levothyroxine is used to treat an underactive thyroid (hypothyroidism). It replaces or provides more thyroid hormone, which is normally produced by the thyroid gland. Low thyroid hormone levels can occur naturally or when the thyroid gland is injured byradiation/medications or removed by surgery. Having enough thyroid hormone is important for maintaining normal mental and physical activity. In children, having enough thyroid hormone is important for normal mental and physical development.
Levothyroxine is also used to treat other types of thyroid disorders (such as certain types of goiters, thyroid cancer). It should not be used to treat infertility unless it is caused by low thyroid hormone levels.

Interactions of T4 L-thyroxine Levothyroxine
Levothyroxine is a synthetic form of thyroxine (T4), an endogenous hormone secreted by the thyroid gland, which is converted to its active metabolite, L-triiodothyronine (T3). T4 and T3 bind to thyroid receptor proteins in the cell nucleus and cause metabolic effects through the control of DNA transcription and protein synthesis. Like its naturally secreted counterpart, levothyroxine is a chiral compound in the L-form.

RETATED PRODUCTS:

Testosterone                          CAS 58-22-0

Testosterone Propionate        CAS  57-85-2    

Testosterone Enanthate         CAS  315-37-7    

Testosterone Decanoate        CAS  5721-91-5 

Testosterone Acetate             CAS  1045-69-8  

Testosterone Phenylpropionate  CAS 1255-49-8

Testosterone Cypionate          CAS  58-20-8

Testosterone Isocaproate       CAS 15262-86-9

Testosterone undecanoate      CAS  5949-44-0

Formestane                            CAS  48-35-1             

Sustanon    

Boldenone                            CAS  846-48-0              

Boldenone Acetate               CAS   846-46-0            

Boldenone Cypionate           CAS  106505-90-2 

Boldenone Undecylenate      CAS  13103-34-9 

Nandrolone                          CAS  434-22-0 

Nandrolone Decanoate         CAS   360-70-3

Nandrolone Phenylpropionate   CAS 62-90-8

Metenolone Enanthate           CAS   303-42-4

Metenolone Acetate              CAS   434-05-9 

Trenbolone Acetate               CAS   10161-34-9     

Trenbolone Enanthate           CAS   2322-77-2    

Drostanolone Propionate       CAS  521-12-0

Drostanolone Enanthate        CAS   472-61-145

Oxandrolone                         CAS  53-39-4

Fluoxymesterone                   CAS  76-43-7

(+)-Dehydroisoandrosterone    CAS  53-43-0             

Methandienone                 CAS   72-63-9        

Stanozolol                        CAS   10418-03-8             

Oxymetholone                  CAS  434-07-1

4-chloro-17a-methyl androst-1,4 diene-3-17b-dione   CAS 2446-23-3          

Mesterolon                      CAS  1424-00-6                

Methasteron                   CAS  3381-88-2

Methyltestosterone         CAS  58-18-4

Methyl-1-Testosterone    CAS  65-04-3

1-DHEA  

4-DHEA    

1,4-DHEA   

1-Testosterone              CAS  65-06-5

1-Testosterone Enanthate   

1-Testosterone Acetate    

Mestanolone                  CAS  521－11－9

Stanolone                      CAS  521－18－6

Exemestane                   CAS  107868-30-4

Estrone                          CAS  53-16-7

Estradiol                        CAS  50-28-2

Estriol                            CAS  50-27-1

Trenbolone cyclohexylmethylcarbonate     CAS  23454-33-3

Tamoxifen                  CAS 10540-29-1               

Clomifene                  CAS  911-45-5       

Tadalafil                      CAS   171596-29-5     

Sildenafil                     CAS   171599-83-0

Vardenafil hydrochloride     CAS  224785-91-5

Anastrazole                    CAS  120511-73-1        

Letrozole                       CAS  112809-51-5

Xenical Orlipastat           CAS  96829-58-2 

Rimonabant                 CAS  168273-06-1 

Sibutramine                 CAS  106650-56-0