Calorie restricting group: Self-reported caloric restriction for at least two years

Calorie restriction group: BMI below 23

Normal eating control: Normal eating (no history of caloric restriction) for two years

Normal eating control: BMI below 30

Obese comparison group: BMI above 30

Obese comparison group: Normal eating (no history of caloric restriction) for two years

Long-term Caloric Restriction and Cellular Aging Markers