Metabolic enzymes are from protein foods ingested and broken down to amino acids, if we are able to properly digest the protein. Protein foods we eat are usually cooked or processed which destroys the enzymes. Symptoms are bloating, fatigue, gas, constipation, obesity, food allergies, gastritis, nausea, diarrhea and a list of digestive disorders. Partially digested protein putrefies, fats turn rancid and carbohydrates ferment. The human body doesn't make cellulase, which breaks down fiber, and yet we are to eat foods high in fiber.
Most individuals have little idea what is necessary to attain and maintain good health.
We live in environments conducive to long and healthy life. Our doctors, who have been trained by a medical establishment supported and directed by the drug companies, can do little for us in our quest for good health. Their usual response to our complaints is to give drugs to stop symptoms or offer to cut out the offending problem. Almost nothing is known about nutrition or prevention of disease. Our modern methods of food production have been able to prevent famine, but at the cost of the soil being depleted of minerals and other valuable nutrients.