This condition is diagnosed and monitored based solely on TSH. T4 and T3 levels are usually normal. If you get your blood test in the afternoon when you have not been fasting, your TSH levels will be lower. Because of this, your subclinical hypothyroidism may be missed.

A test to measure the level of thyroid-stimulating immunoglobulin (TSI) in your blood is available.. This test doesn’t generally require any preparation, such as fasting or stopping.

Intermittent fasting (or “IF”) is an eating pattern where you cycle between periods of eating and fasting. It is a very popular health and fitness trend, with research to back it up. Why.