Research in animals and humans shows periods of fasting before and after chemotherapy protects healthy cells while killing cancerous ones more efficiently.
Metformin has been used to treat diabetes since the late 1950s. It is now on the World Health Organisation's List of Essential Medicines needed for a basic health care system.
"Hangry" is an amalgam of hungry and angry that describes the distinct grumpiness that some people experience when they haven't eaten for a while. Ring a bell?