What should I know about hara hachi bu?

Hara hachi bu is a Japanese practice of eating until you are 80% full, originating from Okinawa, a region known for longevity. It is a form of mindful eating that promotes calorie restriction without deprivation. Observational studies link Okinawan dietary habits to lower rates of chronic disease and longer lifespan, but the specific contribution of hara hachi bu is difficult to isolate. Mechanistic evidence suggests that moderate calorie restriction can improve metabolic markers and reduce oxidative stress. However, no high-quality human trials have tested hara hachi bu alone. It is a practical, low-risk strategy for portion control, but it should not be overinterpreted as a proven longevity intervention. Caveat: Individual needs vary; those with high energy demands or medical conditions should consult a professional. Evidence: practice (cultural practice with limited direct human evidence).