A review of energy metabolism by Roberts and Rosenberg estimates that the decline in metabolic rate that humans experience with aging is equal to about 1-2% per decade. This means that from the age of 20 to 70, we can expect a decline in metabolic rate of 400 calories per day. That’s nothing. Stop blaming your slowing metabolism for your expanding waistline.
Change your behaviors!
Roberts SB, Rosenberg I. Nutrition and Aging: Changes in the Regulation of Energy Metabolism With Aging. Physiol Rev 2006. 86: 651–667