Does anyone out there know how fasting affects a Free T4 reading? My Simon had blood work done. His T4 (RIA) was in range with 2.79 out of .8 to 4. But his Free T4 was 90.8 with a range of 10-50. He wasn't fasting, but seems odd that one would be in range and not the other. Also, he's showing no signs at all of hyperthyroidism at the moment.
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1/10/03 at 5:14pm