In this post, I'll follow up on the last post with a discussion two more important factors that can affect energy homeostasis and therefore our food intake and propensity to gain fat: age and menopause.
Although it often isn't the case in non-industrial cultures, in affluent nations most people gain fat with age. This fat gain continues until old age, when many people once again lose fat. This is probably related to a number of factors, three of which I'll discuss. The first is that we tend to become less physically active with age. The second, related factor is that we lose lean mass with age, and so energy expenditure declines.
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