What an all-plant diet brings to the table
A vegan diet excludes all animal foods, drawing energy and protein from vegetables, fruit, legumes, whole grains, nuts, and seeds. The pattern is typically high in fiber, polyphenols, and the intact plant food matrix, and lower in saturated fat. These features are associated with favorable effects on blood lipids, gut microbiome diversity, and some cardiometabolic markers, though outcomes depend heavily on overall food quality rather than the label alone.
Highly processed vegan foods exist too, so a plant-based diet is not automatically nutritious; whole-food choices drive most of the reported benefit.
Nutrients that require deliberate planning
Several nutrients are harder to obtain without animal foods and need attention. Vitamin B12 is essentially absent from plants and must be supplemented or sourced from fortified foods. Long-chain omega-3s (EPA and DHA), iron, zinc, calcium, iodine, and the amino acid leucine also warrant planning, often through legumes, fortified foods, algae oil, or supplements. Plant iron is less readily absorbed, so pairing with vitamin C helps.
This is general educational information, not medical or dietary advice. A well-planned vegan diet can be nutritionally adequate, but a qualified professional or registered dietitian should guide supplementation and monitoring.