Still, it is certainly possible to have a healthy vegan diet. I find that when veganism is pursued more as a lifestyle than as simply a way to diet, the relationship with food is usually healthy.
For example, the pursuit of a vegan or vegetarian diet is appropriate if it comes from a desire to make less of a negative impact on the world, or with the goal of improving one’s health.
Personally, I chose veganism for a number of reasons including environmental sustainability, disease prevention, vitality, and animal welfare.
Still, I would never argue the nutrient quality of meat, dairy, or eggs. And it’s not uncommon for me to hear ex-vegans or vegetarians speak about feeling ill following a meat-free diet and subsequently experiencing health when returning to meat. Some people say they experienced fatigue, dizziness, thinning hair, or weakness after following the diet for some time.
But in most cases, that's because a successful vegan diet absolutely must contain a variety of foods. Not just fruits and vegetables but also plant-based proteins like beans, soy, nuts, and seeds, along with grains and healthy fats.
And one must be eating a sufficient amount of calories to maintain health. Any adult eating 800 calories on any diet will not function properly and likely suffer health issues, as Younger did.