Phytic acid is a plant anti-nutrient. It chelates calcium, zinc, phosphorous, magnesium in the body, rendering them unavailable..
Phytic acid builds up a mineral deficiency, which develops very rapidly in people on plant based diets. Because of the phytic acid, the nutrients just aren’t there or bio available.
Oatmeal is highest in phytic acid foods in plants and the phytic acid is very difficult to break down. Soy is also very high in phytic acid!
The phytic acid causes lack of bone health, frailness, leading to stress fractures, among other things.
Eliminate all the grains and you eliminate the phytic acid.
Source: Stock, Kevin, guest. “Paul Saladino, MD: Animal Food vs. Plant Food, The Conclusion” Peak Human, 10 May 2019. http://peakhuman.libsyn.com/part-40-paul-saladino-md-animal-food-vs-plant-food-the-conclusion