Why are teens skinny despite eating tons of fast food and other junk?

Question

Why are teens skinny despite eating tons of fast food and other junk?

Answer 1

Not only metabolism (though that helps) but also their lifestyle. Even teenage video game addicts are more active than most adults. I went from walking around school all day and participating in PE to sitting at a desk and typing on a computer.  

Answer 2

we eat the sugar that makes us hyper so we can run around. :) we have high motabulisumz or its cuz we try to look good for getting guys :)  

Answer 3

they could be active

have fast motablolism or something along those lines.

Answer 4

haha our madgically metaslisms.

metablisms are always faster when your young.

and were always doing all sorts of weird things and need the energy.

but were all gonna be used to eating like that and our metablisms will slow down when were older and we will eat the same and be huge and fat :) yukki

Answer 5

Well not every teen is skinny, it just depends on how much they eat and how active they are in every day life..for example if a teen eats a big mac then goes runs around a soccer field for an hour, well it pretty much evens that out :)

Answer 6

Well, I don't eat a lot of junk, but sometimes I do; my doctor has told me that I just have a very fast metabolism.  

Answer 7

hahahaha i know right?!

i eat so freakin much c**p its crazy,

but im 15 pounds underweight.

and i dont exercise THAT much

Answer 8

Yeah, it worked for me for awhile. I ate everything i wanted and then i gained 6 pounds and i'm pissed. but some people have a fast metabolism.  

Answer 9

Really Fast Metabolism.

Thats what i have.

and im glad.

i still workout though

Cause i still want to be healthy and have muscle

Answer 10

fast metabolism and it mah be genetics...they wont get fat because its not in their system too get fat

Answer 11

2 explanations first teens are energetic  second teen girls sometimes throw up also but not all

Answer 12

To answer your question because historically teenagers need a fast metabolism to fight and hunt.

However you should have heard of the childhood obesity epidemic.

Not all teens are skinny

You are generalizing. Many teens are at the point where they eat only until they are full and maintain a healthy diet.  

Answer 13

a fast metabolism

Answer 14

fast metabolism

Answer 15

Heh, not ALL teens are skinny..

Answer 16

Some teens...

and some teens are skinny because there metabolism is probably naturally faster especially those who physically active on a regular basis tend to have faster metabolisms.

Answer 17

They have fast metabolism

Answer 18

Metabolism, genetics, exercise....or all of the above (well, beside...lol)

I mean, I eat like a friggin' horse, I like eat as much as my friend, and she puts on weight so easily, like with one french fry and I haven't gained a pound in like a year or two, and I eat just as much as her. Plus I'm kind of a couch potatoe, so, it just goes to show, there are tons of different factors to weight, not just how much you eat.  

Answer 19

some are just born like that

Answer 20

I'm 13, 5'0", and 78 lbs.  I eat tons of junk food, but I also eat healthy food.  I am guessing because of fast metabolism.  I also do gymnastics, though, which probably factors into it, too.

Answer 21

Weight all depends on whether the supply of nutrients exceeds demand, or vice versa. If you are at a normal weight, you know that you are supplying your body with enough energy for it to respire adequately.

When you are at a younger age, a person's metabolism works at a much faster rate. This means that the food being taken in is used up much faster than normal for respiration, but when you get to about late 20s, this metabolism slows down and people gain weight a lot easier. This is also why many older people find it harder to lose weight, but you can increase your metabolism by doing cardio exercises like running, and eating less more frequently, like every 3 hours :)

Answer 22

High metabolism.  

Answer 23

we are lucky like that! :P