When following a vegan diet, prioritizing nutrients such as protein, iron, calcium, and vitamin B12 is essential. Plant-based protein sources include legumes, nuts, and tofu. Iron can be found in dark leafy greens and fortified cereals, while calcium is abundant in fortified plant milks and leafy greens. Vegan individuals should be especially mindful of vitamin B12, typically found in animal products, and consider supplementation or fortified foods to prevent deficiency. A well-planned vegan diet ensures adequate nutrient intake.