Older & Fatter.Older women can't burn off the fat in a big meal as well as younger women can, says a new study from the Jean Mayer Jean Mayer (February 19, 1920 – January 1, 1993) was a renowned French-American nutritionist and the tenth president of Tufts University from 1976 to 1992. During his lifetime, Mayer was known as a leading expert and activist on hunger issues. USDA USDA, n.pr See United States Department of Agriculture. Human Nutrition Research Center on Aging at Tufts University Tufts University, main campus at Medford, Mass.; coeducational; chartered 1852 by Universalists as a college for men. It became a university in 1955. Jackson College, formerly a coordinate undergraduate college for women, merged with the College of Liberal Arts in in Boston. Susan Roberts and colleagues studied eight 20-something and eight 70-something women during four two-day stays at the research center. Each was fed a meal with 250, 500, or 1,000 calories or no meal at all. (Each "meal" consisted of different quantities of a peanut-butter-and-jelly sandwich and milk.) The older women "burned" (that is, oxidized oxidized having been modified by the process of oxidation. oxidized cellulose see absorbable cellulose. ) the same amount of fat, carbohydrate, and protein as the younger women, with one exception. After the 1,000-calorie meal, the older women burned less--and stored more--fat than the younger women. "This apparent impairment in fat oxidation may help explain the vulnerability of older individuals to weight gain and obesity," says Roberts. Amer. J. Clin. Nutr. 66: 860, 1997. |
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