"I've been experimenting with eating purely vegan. That's completely changed the way that my body works, and the way that I metabolise food, the way it turns into energy, the way that I sleep. It's been brilliant. It’s been great for my exercise and great for my routine."
A vegan approach to eating involves avoiding all animal derived products including meat, fish, dairy foods, eggs, and even honey. For some, a vegan lifestyle also involves ditching animal products like leather or wool.
Zac says that he's focused on staying fit and healthy for as long as possible.
“I think that I want to be able to do what I'm capable of now, when I'm 50, 60, 70 years old — like my great-grandfather, who is still skiing and swimming 20, 30 laps in an Olympic-sized pool every single morning, with one lung!” he said.