Phytic acid is a substance found in the seeds of plants. This acid serves to help protect the seeds in nature. Whole grains include phytic acid, and if some of the phytic acid is not deactivated, it can be difficult for the human digestion system to fully absorb the minerals in whole grains. Phytic acid can prevent the absorption of iron, zinc, and calcium, which can lead to mineral deficiencies. This is why phytic acid is often referred to as an anti-nutrient. But in small quantities, phytic acid also has a good side. It is an antioxidant, which means that it can protect our bodies from oxidation that could otherwise lead to damaging our cells!