Individual thyroid ranges are 38-68% the size of the lab reference range

We've known since at least 2002 that being within "normal range" is never good enough when it comes to thyroid hormone blood tests. An important set of articles has taught us that each human being has an optimal range for TSH, Total T4 and Total T3 that is far less the width of the population-wide …

Continue reading Individual thyroid ranges are 38-68% the size of the lab reference range

The Abbott Free T3 test kit recall of 2018-2019

Recently I came across the information about the Free T3 lab test assay kit recall by Abbott Laboratories announced in late 2018. The recall was initiated in October 2018 and the FDA record was published in February 2019. The reason they list is the potential for a mistakenly lower Free T3 test result. "Samples tested …

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Analyze thyroid lab results using SPINA-Thyr

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 evaluation of thyroid function, pituitary function, and T4-T3 conversion for people who are on no …

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Thyroid therapy paradigm shift: T3 hormone testing is a battleground.

The T3 paradigm shift in thyroid therapy is occurring at a time when Canadian health policy, driven by an old paradigm, is shutting down testing of Free T3. It's hard to see through the confusion because thyroid science is in the midst of this shift. Outdated beliefs rigidly hang on while new beliefs move forward. …

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CSEM attempts to dialogue with thyroid patients, April 8, 2019

In my previous post, I discussed the statement of the Canadian Society of Endocrinology and Metabolism (CSEM) response to thyroid patients' concerns, dated April 8th, 2019. There, I showed that the minor edit of adding a clause about central hypothyroidism is not really an update to the guidelines, which already acknowledged this exception. The document …

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Low-normal FT3 increases Alzheimer’s Disease risk

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 low-normal Free T3 thyroid hormone. "Patients in the lowest FT3 quartile had a more than …

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Forbidding FT3 and FT4 in British Columbia as of late 2018

Someone asked for more info on the guidelines in British Columbia (BC) to prevent FT3 and FT4 testing, so I supply links and summaries of policies here. These barriers became active in BC health policy October 2018, they were being enforced by physicians and laboratories in January 2019, according to posts on our support group. …

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