What are the signs of low blood sugar and how is it related to insulin?

Insulin & Glucose: Insulin allows cells to use glucose as fuel. It helps to regulate blood sugar. Too much will bring blood sugar down putting/keeping it in storage and making it less available to cells. When this happens, hypoglycemia occurs. One may feel shaky, dizzy, headache, nausea, sweaty, etc. Which is a prompt to treat the low blood sugar. Severe lows can cause loss of consciousness, seizure, death.