Written by Dr. Albana Greca, Family Physician If your TSH is low but FT4 is still within the normal range, one possibility is a mild form of thyroid overactivity called subclinical hyperthyroidism. However, I would not make that diagnosis from TSH and FT4 alone. I would also want to know your T3 level, whether the […]

High TSH but Normal FT4: What Does It Mean? Written by Dr. Albana Greca, Family Physician If your TSH is high but your free T4, or FT4, is still within the laboratory reference range, the result commonly fits a pattern called subclinical hypothyroidism. I know the word “subclinical” can be confusing. It does not mean […]