My great grandmother died a month shy of her 110th birthday. The main reason I don't doubt it was true is that my grandma (her daughter) is in fantastic health

My great grandmother died a month shy of her 110th birthday. The main reason I don't doubt it was true is that my grandma (her daughter) is in fantastic health despite being the same age as my grandpa who is in fairly poor health, so there's definitely something in my great grandma's genes that seems to aid longevity. Unfortunately it's looking like my dad got a decent amount of my grandpa's genes instead of my grandma's in that regard, so I'm doubtful I'll be so lucky haha.