The holistic approach says we are mind and spirit as well as body. If we take this approach, nutrition becomes more complicated than if we only consider physical substances. If we include mind and spirit as having a transmuting effect on what we eat, then nutritional choices become subjective and individual to some degree. https://www.nuvectramedical.com/the-lost-book-of-herbal-remedies-review/
If you are a vegetarian or vegan, it's very important to make sure that you take a vitamin B12 supplement. Diets that are low in animal products are often low in this vitamin, and it's not found in many vegetables. A B12 deficiency can cause some serious health issues, so be safe and take a supplement regularly.