3 doctors weighed in:
What is high tsh, 3rd generation?
3 doctors weighed in

Dr. David Geffner
Internal Medicine - Endocrinology
2 doctors agree
In brief: Same as others
The 3d generation TSH assays are best at the lowest ranges - the upper range is debatable as tsh, unlike most products in the blood is not distributed in populations in a bell curve.
The upper limits of the "normal" range of 4 to 5 in assays of all generations is probably wrong.

In brief: Same as others
The 3d generation TSH assays are best at the lowest ranges - the upper range is debatable as tsh, unlike most products in the blood is not distributed in populations in a bell curve.
The upper limits of the "normal" range of 4 to 5 in assays of all generations is probably wrong.
Dr. David Geffner
Dr. David Geffner
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