The act or process, by which living tissues or cells take up and convert into their own proper substance the nutritive material brought to them by the blood, or by which they transform their cell protoplasm into simpler substances, which are fitted either for excretion or for some special purpose, as in the manufacture of the digestive ferments. Hence, metabolism may be either constructive (anabolism), or destructive (katabolism).
The series of chemical changes which take place in an organism, by means of which food is manufactured and utilized and waste materials are eliminated.
While weight loss is important, what's more important is the quality of food you put in your body - food is information that quickly changes your metabolism and genes. Mark Hyman
All those spices and herbs in your spice rack can do more than provide calorie-free, natural flavorings to enhance and make food delicious. They're also an incredible source of antioxidants and help rev up your metabolism and improve your health at the same time. Suzanne Somers
Body concentrates order. It continuously self-repairs. Every five days you get a new stomach lining. You get a new liver every two months. Your skin replaces itself every six weeks. Every year, 98 percent of the atoms of your body are replaced. This non-stop chemical replacement, metabolism, is a sure sign of life. Lynn Margulis
The human brain is at particularly high risk for damage by free radicals because of its high degree of metabolism compared to other tissues, while lacking the levels of antioxidant protection found elsewhere in the body. David Perlmutter
The excitement of vitamins, nutrition and metabolism permeated the environment. Paul D. Boyer