I've been dieting at a deficit for a while now. Nothing special or trendy. Keeping my protein-carb-fat ratio 40-40-20, eating whole grains, lean meats, taking a multi-vit, avoiding processed and packaged stuff, drinking immense amounts of water and avoiding sodium (but intaking enough to sustain me, of course). I am now 169 pounds down from 200. I'm an 18 year-old 5'9" male.

With much regret, today, I broke as the day drew to an evening. I ate a ridiculous amount of carb rich foods, albeit, most was whole wheat or grain, but still, quite a bit. I'm not feeling too bad about it, it happens rarely, and tomorrow'll be better, and maybe this "cheat day" will reboost my metabolism back to normal levels, as it has slown down slightly from the dieting (I can generally "feel it")

As someone once said on this forum, "The difference between 90% adherence and 100% adherence is negligible". Words to live by. I'm not going to let this bad day discourage me from continuing on, although I will avoid looking at the scale tomorrow to see that 0.1 pound increase in weight

Anyway, I was curious as to whether or not the human body has a max or cap/limit as to how many calories it will absorb per period of time. I mean, somehow I don't think it's possible that someone can gain 5 pounds of fat in 2 hours because he ate 2.5 Kg of carbohydrates (eating 33 Klondike sandwiches, 75g in each, for example, which is possible, people eat like 50 hot dogs in a row during competitions)

So my question is, will your body process all of those carbohydrates and store them as fat? Or does it have a certain rate of absorbency and lets a certain percentage of the carbohydrates flush down your system and out of your body?

Well excess carbs is first stored as glycogen in liver and muscle if in excess, then stored as fat once these have been topped up.

Remember, just because you may have 2kg of hotdog not all of it is fat thats why theres labels. I would imagine that everything gets absorbed, the stomach starts it off and the small intestine does the hard work, its long for a reason!

When you eat, not all of it turns into fat. Depending on your body, the energy is burnt digesting it, or it is used for immediate energy, or it is stored for future use, or it is simply burnt off.

Also, it is physically impossible to gain 5 pounds of fat in a single day. Each pound of fat is 3500 calories, and if my math is correct, you would be required to eat 17, 500+ calories per day. To give an example, if one Klondike bar is 400 some calories, it would mean you'd have to eat roughly 44 bars, and on top of that not all of it will be stored as fat... which means you'd probably have to eat even more.

As for the hot dog eating competitions, you should note that most of the top eaters are physically fit. Kind of the opposite of what you'd expect from a eating contest. However, people like that one Japanese guy train all year long for the competition by weight lifting, and eating excessively but smartly. I was reading an article about him in the Men's Fitness magazine, and he started off at 120 some pound, and he gained something like 50 pounds... all muscles. So this guy who eats 50 some hot dogs, probably burned off the calories and without worry that it will cause him to gain fat.

Again, as I stated, it depends on your body. Not everything is stored as fat. If you're physically fit, most likely the excess calories will simply be burnt.

I've seen a documentary about people who eat 33,000 calories per day, bit ridiculous eh? You should catch it on TLC, if you have the channel, I believe it was on there, or maybe Discovery Health