Health Tip: How to Live to Be 100

(HealthDayNews) -- What does it take to live to the age of 100?

According to the journal Nippon Ronen Igakkai Zasshi, the Japanese Journal of Geriatrics, a study of 4,152 Japanese centenarians came up with these rules:

• Eat lots of protein
• Keep calories down
• Get enough sleep
• Live in an area with excellent medical facilities.