HDN: Most - if not all of us, eat lots of cooked foods every day. Can we make up for this enzyme loss by eating raw foods in addition?
HOWELL: No. Cooked foods cause such a large drain on our enzyme supply that you can't make it up by eating raw foods. In addition, vegetables and fruits are not concentrated sources of enzymes. When produce ripens, enzymes are present to do the ripening. However, once the ripening is finished, some of the enzymes leave and go back into the stem and seeds. For example, when companies want to get enzymes from papaya, a tropical fruit, they use the juice of unripe papaya. The ripe papaya itself has no great concentration of enzymes.
HDN: Are there any foods particularly high in enzymes?
HOWELL: Bananas, avocadoes and mangoes are good sources. In general, foods having a higher calorie content are richer in enzymes.
HDN: Do you recommend all raw foods as sources of enzymes?
HOWELL: No. There are some foods, seeds and nuts, that contain what are called enzyme inhibitors. These enzyme inhibitors are present for the protection of the seed. Nature doesn't want the seed to germinate prematurely and lose its life. It wants to make sure that the seed is present in soil with sufficient moisture to grow and continue the species. Therefore, when you eat raw seeds or raw nuts, you are swallowing enzyme inhibitors which will neutralize some of the enzymes your body produces. In fact, eating foods with enzyme inhibitors causes a swelling of the pancreas. All nuts and seeds contain these inhibitors. Raw peanuts, for example, contain an especially large amount. Raw wheat germ is also one of the worst offenders. In addition, all peas, beans and lentils contain some. Potatoes, which are seeds, have enzyme inhibitors. In eggs, which are also seeds, the inhibitor is contained mainly in the eggwhite. As a general rule, enzyme inhibitors are confined to the seed portions of food. For instance, the eyes of potatoes. The inhibitors are not present in the fleshy portions of fruits or in the leaves and stems of vegetables. There are two ways to destroy enzyme inhibitors. The first is cooking; however, this also destroys the enzymes. The second way, which is preferable, is sprouting. This destroys the enzyme inhibitors and also increases the enzyme content from a factor of 3 to 6. Some foods, like soybeans, must be especially well heated to destroy the inhibitors. For example, many of the soy flours and powders on the market were not heated enough to destroy the inhibitors. There is one other way to neutralize enzyme inhibitors, but we'll get to it in just a minute.
HDN: You said that it's not possible to overcome the enzyme drain of cooked foods just by eating other raw foods. What then can people do?
HOWELL: The only solution is to take capsules of concentrated plant enzymes. In the absence of contraindications, you should take from l to 3 capsules per meal. Of course, if you are eating all raw foods, then no enzymes will be necessary at that meal. The capsules should be opened and sprinkled on the food or chewed with the meal. This way, the enzymes can go to work immediately. Incidentally, taking extra enzymes is the third way to neutralize the enzyme inhibitors in unsprouted seeds and nuts. Concentrates of plant enzymes or fungus enzymes are better for predigestion of food than tablets of pancreatic enzymes. This is because plant enzymes can work in the acidity of the stomach, whereas pancreatic enzymes only work best in the alkalinity of the small intestine. If the enzyme tablet has an enteric coating, then it's not suitable, since it will only release after it has passed the stomach. By this time, it's too late for food predigestion. The body itself has already used its own enzymes to digest the food.
HDN: Would people benefit from taking enzymes, even if they have no problem with digestion or if they eat mainly raw foods?
HOWELL: They probably would benefit. Our bodies use up enzymes in so many ways that it pays to maintain your enzyme bank, regardless of what you eat. For example, enzymes are used up faster during certain illnesses, during extremely hot or cold weather, and during strenuous exercise. Also, keep in mind that any enzymes that are taken are not wasted since they add to the enzyme pool of your body. Furthermore, as we pass our prime, the amount of enzymes in our bodies and excreted in our sweat and urine continues to decline until we die. In fact, low enzyme levels are associated with old age and chronic disease. So far, there's not much hard evidence on whether taking additional enzymes will extend the lifespan. However, we do know that laboratory rats that eat raw foods will live about 3 years. Rats that eat enzymeless chow diets will live only 2 years. Thus, we see that diets deficient in enzymes cause a 30% reduction in lifespan. If this held true for human beings, it may mean that people could extend their lifespans by 20 or more years - just by maintaining proper enzyme levels.