Richard and Carl talk about their experiences with fasting. You should always consult your doctor before starting a fast. That said, both Carl and Richard had great experiences with fasting. It's not what you think. It's much better.
Richard mentioned that his regular glucose is 5.2 mmol/l and incorrectly converted that to 80 mg/dl which is incorrect. 5.2 mmol/l is actually 93 mg/dl. There is an online tool for converting between mmol/l and mg/dl at http://en.mte.cz/conversion.php