WHEN Crown Shakur died of starvation, he was 6 weeks old and weighed 3.5 pounds. His vegan parents, who fed him mainly soy milk and apple juice, were convicted in Atlanta recently of murder, involuntary manslaughter and cruelty.

This particular calamity — at least the third such conviction of vegan parents in four years — may be largely due to ignorance. But it should prompt frank discussion about nutrition.

I was once a vegan. But well before I became pregnant, I concluded that a vegan pregnancy was irresponsible. You cannot create and nourish a robust baby merely on foods from plants.

Indigenous cuisines offer clues about what humans, naturally omnivorous, need to survive, reproduce and grow: traditional vegetarian diets, as in India, invariably include dairy and eggs for complete protein, essential fats and vitamins. There are no vegan societies for a simple reason: a vegan diet is not adequate in the long run.