[disgruntled101]

Any diet can be healthy as long as you hit your micronutrient targets for your age and sex and keep calories at your tdee if you want to maintain or slightly lower if you want to lose weight.

[aaron695]

This is exactly it.

For the ultra poor we need to get them the wealth for animal products for the micro-nutrients. It's too difficult to get them on supplements (exactly like vegans and B12)

Then it's about satiation, satiety and palatability.