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Don't believe claims that cooking destroys the nutritional value of your food, or that you must take enzyme pills to replace the enzymes lost in cooking.

One popular author says that heating food above 118 degrees destroys 50 percent of the protein in our food, 50 percent of vitamins, and 80 percent of minerals, and all of the enzymes. These statements are nonsense. Protein and minerals are not destroyed by heat. Some vitamins are lost in cooking, but you still get plenty if you have a reasonably varied diet. The enzymes in food that are destroyed by heat are of no use to you anyway; you make your own enzymes for digestion of your food.

In your stomach and intestines, food is separated into carbohydrates, fats and proteins. Then enzymes made by your body break the carbohydrates, fats and proteins into their building blocks, and only these building blocks can be absorbed into your bloodstream. Enzymes in foods have no function in your body because they are treated like any other protein that you eat. Enzymes in foods are broken down into the building blocks of protein called amino acids in your intestines, so it makes no difference whether or not they are broken down by cooking.

The only common enzyme problem is lack of intestinal lactase that breaks down the double sugar in milk, which can cause diarrhea and cramping when you eat dairy products. You do not need to take enzyme pills unless you suffer from chronic diarrhea or severe weight loss, and the enzymes that may be prescribed for these conditions are copies of enzymes that your body makes, not the enzymes that are found in foods.

Checked 8/9/05

May 12th, 2013
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About the Author: Gabe Mirkin, MD

Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., brings you news and tips for your healthful lifestyle. A practicing physician for more than 50 years and a radio talk show host for 25 years, Dr. Mirkin is a graduate of Harvard University and Baylor University College of Medicine. He is board-certified in four specialties: Sports Medicine, Allergy and Immunology, Pediatrics and Pediatric Immunology. The Dr. Mirkin Show, his call-in show on fitness and health, was syndicated in more than 120 cities. Read More
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