Metabolism changes
It became clear that we didn’t have the right idea of how body size and ageing affect metabolism.”- Herman Pontzer, Duke University
The study
The 4 stages of metabolism
After the first year of life, however, the metabolism begins to slow down a little at a time – by about 3% every year until the age of 20. At that point, i.e. from age 20 to 60, the metabolism stabilises, and then gradually slows down by about 0.7% per year. Finally, from the age of 60 to 95, the metabolism drops by about 25%.
The research could have implications for medical practice, leading to a reassessment of the most appropriate drug doses, especially for children and the elderly

Stem cells. Cellular activity is highest during early childhood and gradually decreases over time, to the point of compromising the proper functioning of organs and tissues.