Abstract
Hippocrates recommended to treat patients with food. One cannot emphasize the enough importance of food and its impact on human behavior. I will expose in detail the rationale for use, the activity, and the production for three of them, i.e., essential fatty acids (flax oil), uleine (Pao aspido), yeast nucleic acid extracts (oligoribonucleotides), and because COVID-19 is here, I will present in a succinct way honey for its immunological properties and bitter orange for its anti-inflammatory activity. Adequate nutrition curbs the development of some afflictions. For example, tuberculosis symptoms have significantly regressed with the standard of living acquired in the Western world after the second world war, whereas it continues to strive in less favored parts of the world. A depreciation of food standards (contaminated foods, poor nutrients, junk-food, and abandon of an array of traditional foods) prevents the weakened immune system of stressed hosts to accomplish its duty to keep the natural homeostasis under control.