Weba study of 6,600 people from birth to age 95 reveals that metabolism peaks in infancy and stays stable in midlife. The findings challenge the common perception that. Webresearchers found that metabolism peaks around age 1, when babies burn calories 50 percent faster than adults, and then gradually declines roughly 3 percent a year until. Webmenopause only makes things worse, slowing women’s metabolisms even more. All wrong, according to a paper published thursday in science. Webthe study, published in the journal science, found four phases of metabolic life: Birth to age one, when the metabolism shifts from being the same as the mother's to a lifetime. Webmetabolism is the process by which your body burns calories and converts food into energy. Learn how genes, age, and lifestyle affect your metabolism speed and. Webhere, experts explain what’s actually happening when your metabolism slows down, and what lifestyle habits you can adopt to resist it for longer. Weblearn how your metabolism drops 1% to 2% every 10 years and how to boost it with protein, muscle, and hormones. Find out how to measure your metabolic.