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How does Human Metabolism Work?- Thermic Effect of Food (TEF)
-The body uses energy to digest and absorb the nutrients present in the food we eat. The rate of energy used for the TEF is about 10%,
it can be increased depending on the composition of each meal.
-The TEF causes much confusion when dieters calculate calories in and out. For example;
-If we overeat the TEF actually increases
due to more food to digest, the stomach and intestines have to work harder and longer. It means if we ate an extra 3500 calories ( number of calories per pound of fat ) we wouldn't actually gain 1 pou
nd of body fat because the TEF has to be accounted for, we would gain less.
-The opposite also happens if we cut 3500 calories to lose 1 pound. The TEF decreases because there would be less food/n
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The entire metabolic process is run by biological catalysts known as enzymes. They are long, chain-like protein molecules that are twisted into characteristic three-dimensional shapes. Enzyme molecule
s function rather like templates to hold reacting molecules together in the proper position to speed their interactions. If your enzymes lose their shape ("denature"), they stop functioning, your meta
bolism ceases, and you're dead. Birds are no different. That's why boiling kills; it denatures enzymes.
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living things must have an unceasing supply of energy and matter. The transformation of this energy and matter within the body is called metabolism.
-Catabolism
-Catabolism is destructive metab
olism. Typically, in catabolism, larger organic molecules are broken down into smaller constituents. This usually occurs with the release of energy (usually as ATP).
-Anabolism
-Anabolism is co
nstructive metabolism. Typically, in anabolism, small precursor molecules are assembled into larger organic molecules. This always requires the input of energy (often as ATP).
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An increase metabolism provides many benefits to help maintain continuous and permanent weight loss:
-less exercise would be needed - giving you more time
-less effort if you did exercise - no n
eed to try burning lots of calories during each session!
-less chance of weight regain later
-still enjoy some favorite foods - no need to be as strict on the diet
-less time spent preparing
low / non fat recipes and meals
-save money from not needing to buy all the expensive low fat varieties
-more chance majority of weight loss is fat rather than water
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Increasing the metabolism is the fastest way to permanent weight loss, a lowered metabolism is very often the reason weight loss progress grinds to a sudden halt. When weight loss slows a dieter may r
educe food intake further, however progress is still slow because a net loss of protein continues to lower the metabolism.
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Dangerous side-effects for rasing metabolism
-In America, some over-the-counter weight loss supplements contain thyroid extract from animals, or other substances that (supposedly) act like human t
hyroid hormones to speed up metabolism.
-Reported side-effects of these products include:
- Nervousness and tremors
- Bulging eyes
- Racing heart beat
- Diarrhea
- Excessive
sweating
- And worse!
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To Continue
More Links to
Metabolism
Hussman Fitness - Home Page
dr. john p. hussman's fitness page ... eat, and how much, in order to fuel your metabolism, promote muscle strength, and maximize fat burning ... more about this in the "metabolism" and "nutrition" se
Metabolism Directory
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Center For Inherited Disorders Of Energy Metabolism (Cidem)
focuses on disorders of mitochondrial function interfering with pyruvate metabolism, fatty acid oxidation, the krebs cycle, and the electron transport chain.
Metabolism Increase
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Carbohydrate Metabolism
sponsored by. from the beginning. glucose metabolism. other carbohydrates. pyruvate metabolism. biosynthesis. regulation. return
Metabolism Directory
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