Authority Nutrition: 4 Reasons Why Some People Do Well as Vegans (While Others Fail).

... science is increasingly supporting the idea that individual variation drives the human response to different diets.

This is a much-needed article, for those quasi-religious vegan friends we all have. I'd wondered why I failed every trial. I'm succeeding with two meals a day, but that's as far as I can take it and maintain health (so far).