Muscle mass loss, decreased caloric intake, and other factors may all contribute to a sluggish metabolism in old age.
The good news is that age itself doesn't play a huge influence, and there are various strategies to keep your metabolism revved up no matter how old you become.
A more significant factor is the food you consume, particularly in the morning when you're just starting your day.
Having a healthy breakfast every morning may help you maintain a healthy metabolism into old age.
Like there are meals that may help naturally speed up your metabolism, there are also some that should be avoided at all costs if you don't want it to slow down.
If you're over the age of 40 and concerned about your metabolism, we consulted Heather Rayle, PhD, the Paleo Diet Coach.