It is not the active form of thyroid though. One iodine
molecule must be removed to make it t3 (liothyronine
), (liothyronine) which is the active form. Sometimes people taking levothyroxine and getting their blood levels into the normal range still have all the symptoms of low thyroid: low body temperature
, dry itchy skin
, brittle dry hair
and nails, hair falling out, constipation
, weight gain
on a low calorie diet
, etc. There are several things that can interfere with the T4 conversion to t3 (liothyronine). Selenium
deficiency is one, and another is and autoimmune disorder known as hashimoto's thyroiditis
, where antibodies attach thryroglobulin and interfere with the process of converting T4 to t3 (liothyronine). Another condition triggered by severe stress
or truama, chronic infections, depression
or childbirth, and is also a famine response is the production of the mirror image of the enzyme that converts T4 to t3 (liothyronine), (liothyronine) so that you start making a mirror image of T3 (liothyronine) called reverse t3 (liothyronine). Not only does reverse T3 (liothyronine) not improve metabolic rate, it actually competes at the receptor site with free T3
(liothyronine) so that you'd continue to have low thyroid symptoms despite adequate amounts of levothyroxine.
Kelp does contain iodine, but 150mcg is a very small dose. Some people do suffer from low thyroid symptoms simply because they don't have enough iodine. You can get iodine in dosages of 12-15 mg per tablet/capsule which is a more reasonable amount of iodine.
dr. Tedde rinker.