2/08/2011 9:35am, #11
In certain cases you can get more calories out of cooked food than from raw. e.g. Feed corn (as opposed to sweet corn).
You can not increase the actual calories that are present, but cooking breaks down the starches into something that is more digestible, therefore you can get more nutrients out of them.
Bones as well - humans can't eat bones, but if you boil them the proteins are released and humans can consume the proteins via the broth.
But no, you can't increase caloric content by cooking."Never trust a quote you read on the internet" - Abraham Lincoln
2/08/2011 9:59am, #12
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Snark aside, there are few things going on, as others have mentioned. The amount of energy in food won't increase from cooking, in the sense that if you were to burn it and measure the energy released it would not increase. Cooking likely decreases calories, actually (from burning, release into the cooking medium in boiling, etc.). But our digestive tract is not a furnace. We chemically digest food and then absorb it. You can increase the bioavailability of nutrients through cooking and thus the effective calories of food.
2/08/2011 10:13am, #13
The short answer is no. Cooking food does however lower the amount of energy it requires your body to break down the food into more easily to metabolize parts. Say a cooked steak costs your body 200 calories to break down into molecules it can utilize for energy. A raw steak might cost your body 400 calories to break down.
So while the cooking process does not increase the calorie count, the result is that it causes your body to expend less energy to make use of the food, and that increases the net amount of calories available from consuming it.
2/08/2011 12:08pm, #14
2/09/2011 12:53am, #15
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Thank you guys, especially jnp. This is very informative. Too bad there's no such thing as a digestability calorie count, eh?
2/09/2011 11:36am, #16
On a related note, the glycemic index of a food can be changed quite a bit by cooking. Check out the article on TNation about it."Keep a sharp knife, shiny boots and be on time."
2/09/2011 2:42pm, #17Calm down, it's only ones and zeros.
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2/09/2011 2:59pm, #18
Yes, I understand this is all very theoretical.
EDIT: Reading comprehension fail. Didn't see the 7 1/2 per day segment.
Still, by my math you aren't losing seven pounds.
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2/09/2011 3:16pm, #19
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2/09/2011 3:19pm, #20
Well, yeah, I understand negative calorie foods are old wife's tales, but I'm not following the theoretical math involved."That was the only way you could destroy me. Neither do I quail at death nor act in deference to any god. So drop your talk, I come resolved to die. But first, there are these gifts I bring for you." At once he hurled a javelin at his enemy, then sent another and another still straight to the mark. - Virgil's The Aeneid