Basal Temperature Test (Thyroid Testing)
Take your temperature using a thermometer under your arm first thing in the morning. Thermometers that scan the forehead or body are not accurate enough. Record your temperature for 5 days in a row. A regular temperature below 97.6º F indicates an under-functioning thyroid.
An iodine patch test is supposed to measure the absorption rate of iodine by your body which will theoretically let you know if you are deficient or otherwise.
- Paint a 3-inch by 3-inch square on your abdomen, inner thigh or inner forearm.
- Allow it to dry before touching anything, as it will stain.
- Monitor the patch over the next 24 hours for color changes.
Your iodine test should last up to 18–24 hours.