According to Tamao Endo, Ph.D. - vice-director (biology and medical Sciences) of Tokyo Metropolitan Institute of Gerontology, Type B people are thought to live longer.
In his recent research "Search for biomarkers of successful aging through glycomics and glycoproteomics of semisuper centenarians" which was conducted from 2012-2013, he wrote:
As the ABO blood group system materials are consists of sugar chains, the possibility that type B is associated with longevity was suggested. (Hirose, N. et al. Exp. Gerontol. 39, 1563-1565, 2004, article of study cooperator Hirose)
ABO式血液型は物質は糖鎖であるが、B型が長寿に関連している可能性が示唆された（Hirose, N. et al. Exp. Gerontol. 39, 1563-1565, 2004, 研究協力者広瀬の論文）