Abbott Laboratories’ reference range normalizes lower Free T3

In late 2018, in Ontario, Life Labs changed its reference range for Free T3 (Triiodothyronine) thyroid lab tests. In our closed Canadian Thyroid Support Group where patients share their lab results and therapy progress over time, this particular Free T3 test has been behaving strangely so far, especially comparing changes from the old assay to the … Continue reading Abbott Laboratories’ reference range normalizes lower Free T3

Why the Free T3 test matters so much

It is surprising that Free T3 is considered an unnecessary test since it is the most active, most essential thyroid hormone in the human body. The research I outline in this post shows that Lower Free T3 levels in blood correlate with very poor health status both within and beyond "low T3 syndrome" -- low … Continue reading Why the Free T3 test matters so much