A slow metabolism may not be the worst thing for your health.
A fast metabolism may be credited for keeping you slim but it may also be responsible for speeding up the aging process.
A review published in the Journal of Nutrition evaluated studies on daily energy expenditure, calorie restriction, and variations in metabolism and lifespan. Researchers discovered a strong negative relationship between residual longevity and residual daily energy expenditure. Higher daily energy expenditure in this review was associated with a shorter lifespan. As we metabolize food for energy, metabolic waste is produced that can cause free radical damage to the body. The higher the metabolism, the greater the metabolic waste produced. This scenario can lead to increased oxidative damage, accelerated aging and earlier natural mortality.

