Brendan Brazier has run a staggering 40 triathlons and 10 marathons.  The ultra-athlete is also the best-selling author of the book “Thrive” and the creator of the “Thrive Forward” web series.

Brazier says the secret is in his diet. He is a vegan and a proponent of so-called super foods.  He has developed his own line of plant-based super foods called Vega.  He tells Jane Velez-Mitchell all about the secrets to his super foods.

For more on this story, watch Jane Velez-Mitchell weeknights at 7 p.m. ET on HLN.