After iron, zinc is the most abundant mineral in our bodies. It is found in literally ever part of the body but has the biggest concentrations in the eyes and prostate. Which is why zinc deficiency can cause vision problems and (in men) fertility problems. Symptoms of zinc deficiency include fatigue, mental lethargy, diarrhea, skin lesions, white spots on nails, and slow wound healing. There are many vegan sources of zinc. However, these vegan zinc sources also contain high levels of antinutrients which block zinc absorption. So, some of those zinc foods might not be such good sources of zinc after all.