how old could someone live to be if they were really healthy and they didnt have any diseases??

Question: how old could someone live to be if they were really healthy and they didnt have any diseases??
- Keywords:
  disease,
  health,
  healthy,
  life expectancy
Asked by stellastar to Daphne, Darren, Jon, Katherine on 21 Mar 2012.
- Katherine Haxton answered on 21 Mar 2012:
  
  The oldest humans are reported to be around 120 years old, so around there I guess. Some scientists think genes may determine how old a person can live to, so it might not just be about being healthy and not having disease.
- Daphne Ng answered on 22 Mar 2012:
  
  The oldest person in the world now is an American woman named Besse Cooper at 115 years old. Genes and environment seem to play a role in determining how long someone lives. So having family members with long lifespans and leading a healthy lifestyle may lead to a long life. Also, females tend to live longer than males!

Question: how old could someone live to be if they were really healthy and they didnt have any diseases??