eli5: why is gaining weight so easy but losing weight so hard
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Simply put, our bodies weren’t built to live during times where calories are as easily and densely accessible as they are now.
Some animals (like rodents) burn through calories extremely quickly and need to eat constantly, some animals (like seals and bears) store fat extremely efficiently because being chonky is essential for their survival. Physiologically, we’re somewhere in the middle, storing some fat but also regularly burning it off when we exercise.
But because we suddenly have more food, and more densely caloric food, now more than ever before, our system is out of date – we should be burning calories more like that first category of animals if we want to keep the weight off, but evolution takes a lot longer to develop than farming technology.
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