These two researchers are challenging the notion of understanding thyroid function based on FT3, FT4 and TSH. In this article they challenge the current models of autoimmune thyroid disease, which they claim to have seen reversed.
The authors note how magnesium plays a central role in determining the clinical picture associated with thyroid disease and is also involved in maintaining fertility. They conclude that iron and magnesium are foundational to mitochondrial function, and CoQ10 and selenium deficiencies impact later stages in the cellular energy cycle and thyroid function/dysfunction. They conclude by arguing physician rely too much on faulty reductionist logic and they should know more about basic biochemistry and the way it fits into mitochondrial function in order to understand metabolism and provide better treatment to their patients.
ncbi.nlm.nih.gov/pmc/articl...
A number of clinical studies have drawn a connection between magnesium levels and thyroid function, including its impact on fertility and cognition.