 It is believed that centenarians possess a different adiponectin isoform pattern and have a favorable metabolic phenotype in comparison with elderly individuals.Research carried out in the United States has found that people are much more likely to celebrate their 100th birthday if their brother or sister has reached the age.These findings, from the New England Centenarian Study in Boston, suggest that the sibling of a centenarian is four times more likely to live past 90 than the general population.