when does your metabolism slow down

8 hours ago 3
Nature

Metabolism slowing down is commonly linked to aging, but the timing and reasons are somewhat nuanced:

  • Metabolism is stable from about age 20 to 60 years. Research shows it peaks in infancy and then gradually declines until about age 20, after which it plateaus until about age 60.
  • Metabolism starts to slow more noticeably after age 60, decreasing by about 1% per year thereafter.
  • The slowdown is related to loss of muscle mass, also called sarcopenia, which begins naturally around age 40 but its effects on metabolism become more evident after 60.
  • Other factors that influence metabolic rate slowing include reduced physical activity, hormonal changes, genetics, and less efficient cellular energy use.
  • Earlier in adulthood (from around 30 years), people may notice that weight management becomes more challenging due to reduced activity and muscle loss contributing to a slower metabolism, although the metabolic rate itself remains relatively stable until later in life.

In summary, the significant metabolic slowdown generally occurs after age 60, with gradual changes starting earlier due to less muscle and activity. Maintaining muscle mass and physical activity can help moderate the slowdown.