In 2011, Gullo’s research team published a landmark study in thyroid therapy titled “Levothyroxine Monotherapy Cannot Guarantee Euthyroidism in All Athyreotic Patients.” Gullo and colleagues examined the TSH, FT3 and FT4 levels and the FT3:FT4 ratios of 1,811 thyroidless patients… Read More ›
A normal ratio of Free T3 (FT3) to Free T4 (FT4) thyroid hormones appears to be a basic principle in thyroid hormone economy when no thyroid hormone dosing and no disease interfere. When measured in pmol/L, the ratio is consistent… Read More ›
This post follows up on several recent posts on the topic of Reverse T3 (RT3) and our thyroid hormone conversion enzymes, the three deiodinases. Here I’m providing some practical tips about Reverse T3 testing, test interpretation, and where we should… Read More ›
There’s a deep lie behind today’s TSH-based definition of “euthyroid” status and today’s policies of TSH normalization in therapy. The lie is that the loss of the thyroid and the initiation of thyroid hormone dosing has NOT altered and skewed… Read More ›
Sigh. Just sigh. Even some of our best thyroid patient advocates can unknowingly share misinformation about thyroid therapy. Mary Shomon’s thyroid articles on Verywell.com are usually to be trusted. But yesterday I was saddened to see that an article supposedly… Read More ›
This post walks through the process of using the SPINA-Thyr to interpret thyroid lab test results. OVERVIEW SPINA-Thyr is a free diagnostic application. SPINA-Thyr takes thyroid laboratory test values TSH, Free T4 and Free T3 and performs calculations that enable in-depth… Read More ›
SOURCE Quinlan, P., Horvath, A., Wallin, A., & Svensson, J. (2019). Low serum concentration of free triiodothyronine (FT3) is associated with increased risk of Alzheimer’s disease. Psychoneuroendocrinology, 99, 112–119. https://doi.org/10.1016/j.psyneuen.2018.09.002 JAN 2019: Study reports increased risk of Alzheimer’s disease with… Read More ›
“T4 is converted into T3 at the cellular level in virtually all organs” This is what Canada’s endocrinologists claim at the opening of their statement under their recommendation “Don’t use Free T4 or T3 to screen for hypothyroidism or to… Read More ›