3. Vegans Live Longer Now, we can be around longer to drive our children crazy! In all seriousness though, who wouldn’t want more time on this earth and to have their loved one around for longer. Loma Linda University followed 70,000 men and women for over 6 years, found that people who follow a plant based diet live longer. “After categorizing study participants into five dietary groups — vegan-why-old non-vegetarians, semi-vegetarians, pescatarians, lacto-ovo-vegetarians, and vegans — authors found that vegetarian groups — the lacto-ovo-vegetarians and the vegans — tended to be older, more highly educated, and more likely to be married, drink less alcohol, smoke less, exercise more and be thinner.