Lack of knowledge about Free T3 peaks and valleys contributes to failure and frustration in T3-based therapies, including desiccated thyroid and T3-T4 combination therapy. On patient support groups, I often see conversations that go like this: “My FT3 result was… 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 ›
What does NEW thyroid science have to say on the topic of thyroid pharmaceutical equivalency? How many micrograms of L-T3 Liothyronine (i.e. Cytomel) are equivalent to L-T4 Levothyroxine (i.e. Synthroid)? Thyroid hormone pharmaceutical monographs currently provide very rigid and low-ratio… Read More ›
In thyroid therapy, how many micrograms of Cytomel (T3) are equivalent to how many micrograms of Synthroid (T4)? Equivalency statements in the product monographs for Pfizer Canada’s Cytomel and for ERFA Canada’s “Thyroid” (NDT brand) claim that a 25 mcg… Read More ›
Here I bring thyroid science into a discussion of effectively adapting and managing the most flexible form of thyroid therapy, T4-T3 combination therapy. This is a model capable of adapting to an individual’s unique thyroid disability and response to thyroid… Read More ›
I’d like to talk about contemporary researchers’ rigid and limited approach to combination therapy. This is the model whose many limitations I point out with the ridiculously long label “mini-T3-mono-combination” therapy. I’ll go over some of the history behind this… Read More ›
In this series, I am examining two T4-T3 thyroid hormone ratios that have been circulating in thyroid medical literature for decades. The first ratio is the “molar ratio” of T4 and T3 hormone secretion from the thyroid gland. The second ratio… Read More ›
Here are the two most pervasive, limiting, and potentially harmful presumptions about T3:T4 hormone ratios in thyroid science today. Ratio #1: There is a perfect physiological T4:T3 ratio secreted from the healthy human thyroid gland, and it is approximately… Read More ›