My dad lived 5 months and 4 days past 100 yrs and Mother to 88 in India. Both were vegetarians, walked regularly for about 45 minutes, never smoked or consumed alcohol, eat only twice a day afternoon and evening and that too limited fixed quantities only. One cup of tea morning and afternoon. No ailment throughout life. Never been to a doctor. If they fall sick they would generally take rest or home remedies. Never seen them sick for more than a couple of days. Inculcated a healthy attitude towards life. They had their share of difficulties but faced these with fortitude. Mother was deeply religious - worshiped Shiva. Fasted every Tuesday. Father was a science graduate. Not exactly an atheist though. Fasted one day in a fortnight. They were in perfect health till the very end doing things on their own except dad who after he crossed 98 needed to be looked after by a carer. His memory was remarkably intact till the very end but remained mostly quiet in later years of life.