Mastodawn

distantshores Feb 28, 2025

Why don't some people never gain any weight no matter how much they eat?

Why don't some people never gain any weight no matter how much they eat? - Lemmy.World

My brother, 21 yo, is like this. He’s ~180 cm tall and has never weighted more than 61 kg (during the 2020 covid lockdown, he made a big deal out of this since it was the first time he passed the 60 kg mark; after the lockdown was over he immediately dropped back to his perpetual weight of ~55kg). I live with him so I know his eating habits: he eats all the time, whatever he wants, whenever, how much he wants and simply doesn’t put on any weight. Is very energetic, no sick look / demeanour. It’s just fascinating to me cause I’m not like that at all, I have to watch what / how much / when I eat.

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Ziggurat Feb 28, 2025

As usual, weight is driven by Calorie in - Calorie out. If it's positive you gain weight, if it's negative you loose weigt.

Your brother is a tall, young male, all of that would point toward a relatively high calorie out also without knowing him in details it's hard to evaluate. There is always that person taking desert twice when out, but skipping lunch on regular day while doing a lot of sport.

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amino Feb 28, 2025

this is actually misinformation that’s already been debunked. I recommend reading my other comment

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HubertManne

yeah. when my metabolism was like this I was not sedentary but was not into sport. mosquitoes loved me (and still do) and they detect carbon dioxide so my bet is just more resting calorie burning or just an inneficient digestive system and maybe both.