Medical Research Supporting Patient Experience
Thyroid patients who have difficult, by-the-book and medically-rigid doctors often ask if there is anything out there to support what patients ALREADY know by their experience.
This page will list professional research, articles, opinions and links which support what we already know…or they are at least in the right direction. And you can use these to support your argument with your black-and-white physician that certain thyroid treatments do NOT work, and there IS a better way to do all this.
***FOUND MORE RESEARCH ARTICLES THAT WOULD HELP THIS PAGE?? Use the Contact below to send the link to the article or comment. Remember: I’m only seeking research that can be used to help doctors understand better thyroid treatment, as well as which challenges their bad information.
THE FAILURE OF T4-ONLY
- (T4-ONLY INADEQUATE) Conclusions from this study show that more than 20% of patients, despite normal TSH levels, do not maintain FT3 or FT4 values in the reference range, reflecting the inadequacy of peripheral deiodination to compensate for the absent T3 secretion. It concludes that a more physiological treatment than levothyroxine monotherapy may be required. Study is titled “Levothyroxine monotherapy cannot guarantee euthyroidism in all athyreotic patients”. http://www.ncbi.nlm.nih.gov/pubmed/21829633 (See #5 below which shows 70%) Comment from Janie: And from reported patient experience, even with what appear to be adequate levels of T3, patients on T4 state they do NOT get the good results they do on desiccated thyroid.
- (T4-ONLY LIKE A PLACEBO) Thyroxine was no more effective than a placebo in improving cognitive function and psychological well-being in patients with symptoms of hypothyroidism. Thyroxine did NOT improve cognitive function and well-being in healthy participants. http://www.bmj.com/cgi/content/full/323/7318/891
- (T4-ONLY FAILS TO GIVE ENOUGH FREE T3 IN BRAIN)Despite a two-fold increase in total serum T3, free T3 in the cerebrospinal fluid (CSF) remained unchanged, which agrees with previous results in rats showing that T3 is less exchangeable between serum and CSF. Read More: http://informahealthcare.com/doi/abs/10.3109/00365513.2010.541931
- (THERE’S BETTER TREATMENT THAN SIMPLY SYNTHROID OR OTHER T4-ONLY MEDS) At the 90th annual meeting of the Endocrine Society, June 2008, it was announced that T3 can be an effective substitute for T4. And…the target TSH was .5 – 1.5. http://www.endocrinetoday.com/view.aspx?rid=28931 Comment from Janie: Even though being on desiccated thyroid, with its T4, T3, T2, T1 and calcitonin, is even better according to the experience of many patients, this announcement is at least a good step in the right direction. Hopefully, they will take the final step!
- (SWEDISH STUDY SAYS 70% ARE NOT SYMPTOM-FREE on T4-ONLY) Swedish Doctor at Karolinska Hospital in Stockholm states: Levaxin is the medicine that is offered to patients with Hypothyroidism. Approximately seven out of ten patients are not symptom-free. Stefan Sjoberg, endocrinologist and associate professor at the Karolinska Institute has therefore, together with his research team, shows that patients blood tests may show normal levels of thyroid hormones with T4-only due to not enough conversion to T3. Research underway at Halmstad Hospital. http://www.sourze.se/Forskare_ser_omvandlingsproblem_med_Levaxin_10742982.asp
T4 COMBINED WITH T3 GIVES BETTER RESULTS:
- As far back as 1999, the New Journal of Medicine reported superior results of a synthetic T4 and T3 combination treatment, especially on the brain and other tissues. http://content.nejm.org/cgi/content/full/340/6/424
- And another one titled Thyroid Insuffiency: Is Thyroxine the Only Valuable Drug, http://www.encognitive.com/ Journal of Nutritional & Environmental Medicine (2001), 11, 159–166
- And here’s another one from 2009 sent by Paul: http://www.eje-online.org/cgi/content/abstract/EJE-09-0542v1 (has a fee) but here’s where you can at least see the abstract: http://www.ncbi.nlm.nih.gov/pubmed/19666698 They evaluated depression and anxiety rating scales as well as patients ownpreference.
- Also this one: http://www.endocrine-abstracts.org/ea/0013/ea0013P316.htm
- At first blush, this Amsterdam study appears to give the same propaganda of T4 only. But as you read on, it mentions this: Third, recent animal experiments indicate that only the combination of T4 and T3 replacement, and not T4 alone, ensures euthyroidism in all tissues of thyroidectomized rats. From 2001, Developmental Endocrinology to Clinical Research: http://content.karger.com/ProdukteDB/produkte.asp?Aktion=ShowAbstract&ArtikelNr=48140&Ausgabe=227546&ProduktNr=224036
A HEALTHY THYROID PRODUCES A ROUGH EQUIVALENT TO 3-5 GRAINS OF DESICCATED THYROID A few years ago, we found detailed medical info that revealed this, explaining why so many of us ended up in that range (tho not all). This article states: Estimates of average normal secretion for euthyroid humans are 94-110 µg T4 and 10-22 µg T3 daily (300). If you need more, it can be due to exogenous desiccated thyroid (giving it to yourself) vs. the superior absorption of natural release of thyroid hormones. Scroll down to nearly the bottom of the page to the heading “Proteolytic Cleavage of Thyroglobulin” and the 4th paragraph. http://www.thyroidmanager.org/Chapter2/2-frame.htm
GENE VARIATION AFFECTS THE ABILITY TO CONVERT T4 to T3 IN SOME (i.e. justifying adding T3 to T4, or even better, using desiccated thyroid). From the Journal of Clinical Endocrinology and Metabolism comes this article titled: “Common Variation in the DIO2 gene predicts baseline psychological well-being and response to combination thyroxine plus triiodothyronine therapy in hypothyroid patients” May 2009,94(5):1623-1629.
Research conclusion: “Commonly inherited variation in the deiodinase 2 gene (DIO2 ) is associated with impaired baseline psychological well-being on T4 and enhanced response to combination T4/T3 therapy but did not affect serum thyroid hormone levels. A large patient study found that 16% of the study population had a variant DIO2 gene which impairs the ability of T4 to be converted to T3. Thanks to Terry for sending this!
HEART ISSUES FROM T4-ONLY TREATMENT: The Journal of Clinical Endocrinology & Metabolism has reported that long-term levothyroxine replacement therapy in young adults is associated with cardiovascular abnormalities. http://jcem.endojournals.org/cgi/content/abstract/93/7/2486 2008 COMMENT: Of course, thyroid patients have known this a longggg time as they watched their cholesterol and Triglycerides rise while on a lousy T4-medication, and some end up with heart problems. But this finally gives some research on a FACT.
HOW HYPOTHYROIDISM AFFECTS THE BRAIN: From 1980 and the J. Clin. Invest. (The American Society for Clinical Investigation, Inc.), this article explains how the brain is affected by thyroid hormones, whether from excess or a deficiency, and talks about the deiodinase enzymes converting T4 to T3. http://www.jci.org/articles/view/109887/files/pdf
SUPPRESSIVE TSH RESEARCH:
- This PubMed article from 2005 is about research which shows that even suppressive doses of T4 does not negatively affect bone mineral density. http://www.ncbi.nlm.nih.gov/pubmed/16269872 And this one from 1993: http://www.ncbi.nlm.nih.gov/pubmed/8252740
- The Society for Endocrinology in the UK in 2010 did research which revealed that having lower TSH levels while taking Thyroxine replacement is not detrimental to health, and that low level was .004 to .4 !! I also did a blog post about this here. http://www.sciencedaily.com/releases/2010/03/100315230910.htm
EARLY COMMENTS ABOUT PROBLEMS WITH THE TSH: This was a short forum with comments by David Derry, Raymond Peat, and individuals: http://www.bmj.com/cgi/eletters/314/7088/1175#26029 COMMENT: you can see the blossoming of doubt about the TSH in these posts from 1999 to 2002.
TSH RANGE NEEDS TO BE NARROWER Written in 2005 in the The Journal of Clinical Endocrinology & Metabolism, this article says the evidence is compelling that the TSH range should be far more narrow, and it agrees with what Janie has said all along: that “reference populations previously considered normal were contaminated with individuals with various degree of thyroid dysfunction that served to increase mean TSH levels for the group”. http://jcem.endojournals.org/cgi/content/abstract/90/9/5483
LOW T3 CAN BE IMPLICATED IN DEATHS WHILE IN ICU In unselected ICU patients, FT3 was the most powerful and only independent predictor of ICU mortality among the complete indicators. Addition of FT3 to the APACHE- score could significantly improve the ability to predict ICU mortality. http://www.ncbi.nlm.nih.gov/pubmed/22257427
CELIAC DISEASE IS A STRONG PREDICTOR OF HAVING HYPOTHYROIDISM: From the Oct. 2008 issue of the Journal of Clinical Endocrinology and Metabolism come this article which states people with celiac disease had a greater than fourfold increased risk of being diagnosed with hypothyroidism, a threefold increased risk of suffering hyperthyroidism, and a 3.6-fold increased risk of developing thyroiditis. http://jcem.endojournals.org/content/93/10/3915
MISCELLANEOUS RESEARCH TO SUPPORT BETTER TREATMENT: From Hot Thyroidology and the Journal owned by the European Thyroid Association, this is a 247 pages of research on topics such as Thyroid Cancer, Thyroid Metabolism, Iodine, Autoimmunity, and much much more. http://www.hotthyroidology.com/downloads/eta_abstractbook_2007.pdf COMMENT: I confess that I haven’t made my way through all of it, but if you do it, you may find some real gems in this!
RESEARCH VALIDATING THE IMPORTANCE OF T2, aka 3, 5-diiodothyronine (which you get in desiccated thyroid!) The accumulated evidence permits the conclusion that the actions of T2 do not simply mimic those of T3 but instead are specific actions exerted through mechanisms that are independent of those actuated by T3 and do not involve thyroid hormone receptors. In addition, very recent evidence leads us to suggest that T2 may be a potentially useful agent for the treatment of diet-dependent overweight (and the consequent hypertriglyceridemia and high cholesterol level) without inducing thyrotoxicosis. http://www.ingentaconnect.com/content/ben/iemamc/2006/00000006/00000003/art00004
BIPOLAR CAN BE STRONGLY RELATED TO UNDIAGNOSED OR POOR THYROID TREATMENT: Dr. Peter Whybrow, a world-renowned expert on bipolar disorder, published his findings in the journal Molecular Psychiatry about the connection between thyroid and bi-polar. But it’s hard to find on the net. Instead, here is one of several other articles which talks about this connection: http://www.psycheducation.org/thyroid/introduction.htm
MISCARRIAGES CAN BE RELATED TO HYPOTHYROID or POOR THYROID TREATMENT: The following link takes you to a website with a study of pregnant women with “normal” TSH, but who are positive for antibodies, who have fewer miscarriages following thyroid treatment. Medscape requires a log-in, but it’s free, and it sends regular e-mails on the latest research according to your preferred topics. www.medscape.com/ COMMENT: Once again, this article proves that a so-called normal TSH means squat, and miscarriages can have a strong connection to your undiagnosed or undertreated hypo state.
BREAST CANCER AND THYROID PROBLEMS CAN BE RELATED: Many studies have been coming out about the connection, and especially as related to your iodine levels. Here is one titled from 2003 “The thyroid, iodine and breast cancer” from Breast Cancer Res and PubMed. http://www.ncbi.nlm.nih.gov/pubmed/12927031 plus “Breast Cancer in Association with Thyroid Disorders” http://www.ncbi.nlm.nih.gov/pubmed/12927040 From 2009: http://www.ncbi.nlm.nih.gov/pubmed/19810133
T3 IS NOT ONLY ANTI-CANCER IN YOUR LIVER, BUT CAN HELP YOUR LIVER TO REGENERATE: From the American Association for Cancer Research, this research study shows that T3 can not only be anti-cancer, but actually help your liver to form new cells: http://cancerres.aacrjournals.org/cgi/content/abstract/60/3/603 COMMENT: This article shows that T3 REDUCES liver nodules, and you can wonder what T3 might do against cancer elsewhere in your body.
THYROID HORMONES AFFECT HAIR This research explains how insufficient T4 and T3 can affect hair follicles. http://www.ncbi.nlm.nih.gov/pubmed/18728176
DO WE NEED MORE TRIALS ON T4 and T3 COMBINATION THERAPY IN HYPOTHYROIDISM? Yup, this is a real live article title from the European Journal of Endocrinology, Oct. 6, 2009. And patients on desiccated thyroid can shout a resounding YES, YES, YES! We know the truth. When are you? Comically, the beginning of this article states that “10% of hypothyroid patients are dissatisfied with the outcome of levothyroxine replacement. It is unlikely that slight over- or under-treatment with T4 explains remaining complaints.” NOT. The rest is good. http://www.ncbi.nlm.nih.gov/pubmed/19808902?ordinalpos=9&itool=Email.EmailReport.Pubmed_ReportSelector.Pubmed_RVDocSum
See this Big Daddy of references from Thierry Hertoghe, MD of Belgium.