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I had two blood tests few years ago. Based on T4 levels, the first one was 17.5 pmol/L (9.03-23.86) and the second one was 129.8 nmol/l (64.0-167.0). I found that both numbers are a bit higher than both ranges. Do I have hyperthyroidism? If so, could it be the reason I can't gain weight?
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