this post was submitted on 04 Oct 2025
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Not sure if this is clear. Our bodies are supposed to replace all the cells every 7 or so years. Does that mean the fat too? Or when someone loses 20 year weight, are you getting rid of 20 year old fat?

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[–] mushroommunk@lemmy.today 102 points 4 days ago (20 children)

The 7 year thing is a myth. Howtown has a very good summary on it. 7 year myth some cells are replaced but how often depends on the cell type, some never get replaced.

When you gain weight your fat cells grow, and when you lose weight they shrink. You don't actually gain and lose fat cells the way people think. However, the stuff in those cells could very well be old. It's a complex system and hard to sum up and I'm only friends with the biology people from college but that's what I understand from them.

[–] TheRealKuni@piefed.social 44 points 4 days ago (13 children)

When you gain weight your fat cells grow, and when you lose weight they shrink. You don't actually gain and lose fat cells the way people think.

But as my doctor explained to me, if they get big enough, they divide. Then even if you lose weight, you have fat cells hanging around who think they should be holding onto more fat than they are. So your body will want to be fat, and will enforce that with cravings.

It’s why it’s extremely hard to lose a large amount of weight and leave it off. I’m on my third major attempt now.

[–] JandroDelSol@lemmy.world -1 points 3 days ago (3 children)

your taste bud's cravings are the the fault of America's food culture, not your body

[–] incompetent@programming.dev 1 points 2 days ago (1 children)

your taste bud's cravings are the the fault of [...] not your body

Can you cite a reputable source to confirm this? Doesn't seem right to me.

[–] JandroDelSol@lemmy.world 1 points 1 day ago

i mean, it's anecdotal, but I crave things that are super unhealthy, like Rally's fries or ice cream, and I rarely used to crave anything that has real nutritional value. Now that I've cut back quite a bit on those, my cravings are starting to return to more healthy options, and right now I would kill for some roasted zucchini.

in my experience, people are more likely to crave fast food and sweets because they're literally designed to be addictive. if most people follow their cravings, they aren't going for the things that provide nutritional benefits, they're going for the tasty stuff

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