Category Archives: DTE (Dessicated Thyroid Extract)

In Treatment of Hypothyroidism Need For t3 Could Be Genetic


Do you wonder if you need t3 (Cytomel, triiodothyronine, liothyronine) added to your thyroid hormone treatment to feel normal again? The answer could be in your genes.

Recent discoveries reviewed by Antonio C. Bianco, M.D., Ph.D. at the recent American Thyroid Association meeting, reveal how genetic differences influence the effectiveness of thyroid hormone replacement. Dr. Bianco’s lecture focused on studies pinpointing inborn differences in the way people metabolism thyroid hormone to explain why t3 treatment of hypothyroidism is probably required by some to restore normal functioning of their brain, muscle and heart.

The most frustrating problem for people with hypothyroidism is being unable to convince their doctor that treatment with Synthroid, Levoxyl or similar pure t4 product, isn’t working. Continued symptoms of fatigue, weakness, inability to concentrate or think clearly, and inability to lose weight despite really trying, result in tension between the doctor and the “complainer”. When assessing the adequacy of thyroid hormone replacement therapy most doctors rely on the blood tests known as the Thyroid Function Panel. Typically this includes a measurement of t4, t3, t3RU, and TSH. Some panels may also include free t4 or free t3 measurements. If the hormone levels on these tests are “within normal limits” the doctor will often insist that the treatment is a success but it is the patient who fails to recognize this. A minority of endocrinologists know many of these “failures” can be turned into success by the addition of t3, the less utilized but much more powerful form of thyroid hormone.

Most of the biological effects of thyroid hormone in the body are due to the action of t3. The most common forms of thyroid hormone replacement however, involve giving t4 in the form of Synthroid, Levoxyl, levothyroxine etc. The t3 required by our tissues is produced by specific enzymes which convert t4 to t3 in the cells of the liver, kidney, brain, muscle, heart etc. These converting enzymes are known as deiodinases and under normal conditions they are responsible for about 80% of the body’s t3. The process
by which t3 is produced from t4 is known as peripheral conversion.

It has long been the contention of the leaders in thyroid disorders that based on their arithmetic, t4 replacement is sufficient to provide all the t3 the body needs via peripheral conversion and giving t3 supplementation doesn’t make good medical sense. Now, based on the new information provided by researchers like Dr. Bianco, the “arithmetic guys” will, in my opinion, need to revise their thinking finally allowing the way for acceptance of t3 replacement approaches.

I will continue the explanation of the new breakthrough in genetic control of thyroid hormone replacement treatment in Part 2 of this post.

What is DTE Image with medicine and medical supplies

What is DTE Therapy?


DTE stands for “desiccated thyroid extract” which is made up of thyroid hormones refined from pig thyroid and used to treat people with hypothyroidism (low thyroid hormone). This is possible because human and pig thyroid are very similar in the production of the 4 known thyroid hormones. For over 100 years, DTE had been used successfully to treat hypothyroidism.

T4, also known as levothyroxine, is the most abundant of the 4 thyroid hormones and synthetic levothyroxine has almost completely replaced DTE treatment since the 1980’s. There is no scientific evidence however, that synthetic T4 is better than DTE for treating hypothyroidism. The almost universal switch to levothyroxine and away from DTE appears to be due to a shrewd worldwide marketing campaign by the makers of brand synthetic T4.

Due to this marketing, Synthroid, the major brand of synthetic T4, became the most widely prescribed medication in the U.S. during the 1980’s and 90’s. Only in recent years has the medical community begun to recognize the failure of synthetic T4 to properly treat all people suffering with hypothyroidism, and the role of DTE to improve results.