Australian researchers from South Australia, the University of Adelaide, and SAHMRI conducted a study involving 55 adults for six consecutive days at a sleep laboratory. The study demonstrated that nighttime meals disrupt circadian rhythms and slow down metabolism. Participants were divided into groups: fasting, snacking, and full meals during the night. Those who did not eat at night showed stable blood sugar levels (+0.3), due to increased insulin production. Snacking at night led to a moderate increase in glucose levels (+1.0). A full meal before bed caused significant deterioration of glucose tolerance (+2.0). Professor Heilbronn noted: 'Blood glucose levels sharply increased among those who had a substantial dinner or snacked late at night.' The study was published in the journal Diabetologia.