[header] How to live past age 100 [title] Maintain a healthy body weight, especially in your teenage years. [step] According to a study in the journal of pediatrics, being overweight at age 14 can increase your risk of diseases and disorders, such as type 2 diabetes. Adults with diabetes are two to four times more likely to develop heart disease. 
Try to maintain a healthy body weight throughout your life, starting in your teenage years, to increase your chances of living past 100. [substeps] You can determine if your body weight is healthy by looking at the estimated body weight for your height and gender.