No one wants to be ageist or sexist in thyroid screening or diagnosis. But if we are blind to the way that age and sex can distort the hypothalamus-pituitary-thyroid (HPT) axis, our interpretations of thyroid hormone levels and TSH will inevitably become ageist and sexist by refusing to respect and accommodate human diversity. In a previous post, “Age bias may hide hypothyroidism under a normal TSH,” I discussed the transformations in TSH-FT4 relationships with age, focusing on adults. Then, I followed up with a post focusing on “Pediatric and teenage TSH, FT4, and FT3 levels.” Those previous posts discuss mainly …