Taking t3 or natural desiccated thyroid drugs j gastroenterol hepatol impact factor


Tests for quality of life and depression were done at the start of the study, and again after 12-week treatment periods. During each of the two 12-weeks periods, subjects were either given levothyroxine plus T3, or levothyroxine plus a placebo and then switched for the next 12-week period. Participants were "blind" in that they were not aware whether they were taking active T3 or placebo.

The quality of life and psychological factors evaluated included, among other factors: general health, social functioning, mental health, vitality, sensitivity, depression, and anxiety. The study showed that among the patients, most of whom were women, 49% of the patients preferred the combination treatment, and only 15% preferred levothyroxine-only treatment.

Researchers and endocrinologists have been going back and forth for almost two decades about the value of T3. Based on their own practical experience with patients, and on the growing body of research evidence, some conventional doctors, and more holistic and integrative practitioners are increasingly adding supplemental T3 as a solution to help optimize thyroid treatment for some patients. They add T3 in several ways:

It’s important to note, however, that because T3 is the active hormone, it can have an over-stimulatory effect on heart rate and pulse in some people, especially those with a history of heart disease, the elderly, and those with heart irregularities like mitral valve prolapse.

Even in those patients who do not have any heart or age-related issues that may make T3 problematic, some patients are simply more sensitive to the stimulating effects of T3. The heart is very sensitive to thyroid hormone in general, and for some people, even low doses of liothyronine, or the small amount of T3 in natural desiccated thyroid drugs can cause a rise in pulse or heart palpitations.

Some integrative physicians, in fact, believe that the slow-release T3 is actually the optimal form for supplemental T3, as it more closely resembles the body’s own conversion to and release of T3, and because the slow-release form is less likely to cause any side effects. Natural Desiccated Thyroid

Some practitioners have found that a subset of their patients has had safe resolution of their symptoms while taking prescription natural desiccated thyroid, abbreviated as NDT. NDT is also known as porcine thyroid, thyroid extract, natural thyroid or even "pig thyroid." It is an FDA-regulated prescription drug, manufactured from the dried thyroid gland of pigs. The drugs in this category include Armour Thyroid, Nature-throid, and WP Thyroid in the United States, Canada’s Erfa Thyroid, and a generic natural desiccated thyroid in the United States produced by Acella.

Natural desiccated thyroid has been in use for more than a century. Many integrative hormone experts believe that these drugs, which provide T4, T3, T2, T1, and other thyroid hormones and nutritional elements, more closely resemble human thyroid hormone than the synthetic drugs. They report that a substantial percentage of their patients feel better on them. Some patients find that they feel best on natural thyroid drugs, or on synthetic drugs plus some natural thyroid. A Word From Verywell

Free T3 and reverse T3 blood tests, along with clinical signs and symptoms of hypothyroidism, may help identify whether you have normal levels of available T3, or may benefit from T3 treatment. Some integrative physicians believe that adequate thyroid replacement will result in free T3 levels in the middle to upper half of the laboratory reference range.

Keep in mind that T3 testing and the use of T4/T3 combination treatments and natural desiccated thyroid drugs are controversial issues. Many endocrinologists and conventional physicians are very resistant to the idea of testing T3 and treating with T3 drugs, despite the promising research findings. They cite concerns that excessive doses of T3 could cause heart palpitations or other side effects.

Celi FS, et al. " Metabolic effects of liothyronine therapy in hypothyroidism: a randomized, double-blind, crossover trial of liothyronine versus levothyroxine." J Clin Endocrinol Metab. 2011 Nov;96(11:3466-74. doi: 10.1210/jc.2011-1329. Epub 2011 Aug 24.

Escobar-Morreale HF, et al. " Treatment of hypothyroidism with levothyroxine or a combination of levothyroxine plus L-triiodothyronine." Best Pract Res Clin Endocrinol Metab. 2015 Jan;29(1):57-75. doi: 10.1016/j.beem.2014.10.004. Epub 2014 Oct 25. Review.

Nygaard, B et al. "Effect of combination therapy with thyroxine (T4) and 3,5,30 -triiodothyronine versus T4 monotherapy in patients with hypothyroidism, a double-blind, randomised cross-over study." European Journal of Endocrinology (2009) 161 895–902