Human body temperature to give the most accurate assessment of core body temperature, particularly in hypothermia. In the early 2000s, ingestible thermistors in capsule form were produced, allowing the temperature inside the digestive tract to be transmitted to an external receiver; one study found that these were comparable in accuracy to rectal temperature measurement. In the 19th century, most books quoted "blood heat" as 98 °F, until a study published the mean (but not the variance) of a large sample as . Subsequently that mean was widely quoted as "37 °C or 98.4 °F" until editors realised 37 °C is closer to 98.6
Wilson's temperature syndrome Wilson's temperature syndrome Wilson's (temperature) syndrome, also called Wilson's thyroid syndrome or WTS, is an alternative medicine concept which attributes various common and non-specific symptoms to low body temperature and impaired conversion of thyroxine (T4) to triiodothyronine (T3), despite normal thyroid function tests. E. Denis Wilson, a physician who named the syndrome after himself, advocates treating these symptoms with sustained-release triiodothyronine. Wilson's syndrome is not an actual medical condition, and there is no scientific evidence supporting Wilson's claims. The American Thyroid Association (ATA) describes Wilson's syndrome as at odds with established knowledge of thyroid function. The ATA described the diagnostic