Your metabolism rate remains fairly steady from 20 years old until 60, research suggests.

Your body faces a lot of change as you age. For instance, did you know the amount of times you need to get up at night to pee (and the number of nighttime wake-ups in general) shift as you grow older?

So too does your muscle mass ― an article published in Current Opinion in Rheumatology says the decline starts at roughly 40, and can lead to as much as 50% muscle loss by the time we’re 80.

This is partly why people say their “metabolism” ― which is basically how your body uses food and drink to keep you........

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