I listened to few podcasts with Sinclair. When someone asks him what he eats, his reply is always "vegetables, leafy greens". No rich source of protein, fat. Is this for real?
Though if you're trying to build muscle/are more physically active you'd probably want more protein rich food sources
[0] https://www.bluezones.com/2020/07/blue-zones-diet-food-secre...
My point is that fasting, at least in this blue zone, isn't an end unto itself. It's just one part of a way of life, so, to focus the diet misses the whole picture.