Earlier than most, Chris Mirabile came face-to-face with his own mortality. “I had a sudden seizure and it turned out it was caused by a brain tumour,” says the Florida-based founder.

“At 16 years old, I was wondering if I would wake up the next day or not. It transformed my perspective on health. I started to think not just about short-term outcomes, but decades into the future. I was thinking: ‘How can I avoid getting cancer, ever?’”