Your annual fasting glucose test tells you one number on one morning. A CGM tells you what happens to your blood sugar every five minutes for two weeks — including after every meal you eat, every night you sleep, and every workout you do.
Everyone optimizes room temperature for sleep — but the surface touching 70% of your skin all night is the variable that actually determines whether your core temperature drops enough to trigger deep sleep.
Two people eat the same meal and get glucose responses that differ by a factor of ten — which means every generic dietary guideline you have ever followed was built on someone else's biology, not yours.
Your doctor's lab report tells you whether you're sick — it tells you nothing about whether you're performing at the biological ceiling your genetics allow.
The metabolic benefits of intermittent fasting are real, replicated, and protocol-dependent — and the protocol most people are running captures the fewest of them.