Nutritional advice -- mythbusters?

  • Posted by a hidden member.
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    Aug 15, 2009 8:04 PM GMT
    I've had three questions on my mind for the longest time, and haven't really had anyone to ask. I think of myself as fairly well educated, but nutrition & health topics are just so bogged down by so much lore....

    Does anyone have any definitive answers:

    1. Is it true that even if you eat good fats instead of bad fats, these fats can still be stored as body fat? It may be good for your heart, but your body will still store any unused amounts as body fat?

    2. Also, regarding kinds of fats, even if you eat fats that are "more easily burnt" (e.g., coconut milk rather than pork fat), they can still be stored as body fat, meaning 5g of "more easily burnt" fat is the moral equivalent of 5g of harder to burn fat?

    3. Why should protein overloading work? I get that you want to eat enough protein to rebuild your muscles, but anything in excess would go to body fat / passed as waste, right? So why overload on protein beyond what your body needs? If you eat more than your body uses, does your body build more muscle just because of the presence of excess protein? Can't you get fat if you overdo protein overloading?

    Thanks. Any sort of scientific backing would be greatly appreciated!
  • metlboy

    Posts: 105

    Aug 16, 2009 1:48 AM GMT
    From my understanding, any excess calories you consume be they good fat, bad fat, complex carb, simple carb, protein, whatever, can be stored as fat. The main difference is that of the fat calories you are eating anyway, you should aim for more to be 'good fats'.
  • kietkat

    Posts: 352

    Aug 16, 2009 2:16 AM GMT
    Regarding proteins, as I can recall from metabolic biochemistry all proteins are broken down to amino acids which can't be store by the body but rather undergo catabolism to form ammonia (needed for urea production) and alpha-keto acids which will enter the citric acid cycle to eventually produce glucose via a process known as gluconeogenesis.

    The glucose is used as fuel for the brain, skeletal muscle, and tissues. Though it is important to note that the glucose produced in this manner would be rather insignificant since the amino acids from proteins are also a much desired source of carbon for the body so it could most likely enter other pathways as well.

    So getting fat from just gorging on proteins seems plausible but is rather uncommon. icon_cool.gif
  • Posted by a hidden member.
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    Aug 16, 2009 11:01 AM GMT
    Fat is fat...Your body is 100% efficient at intake and storage of fat. 9kCal per gram regardless of the source

    Poly unsaturated fats are less dense meaning there is less off them packed into the same space. So a tablespoon of oil is naturally going to have less energy than one of lard. But if you have a energy surplus beyond that of BMR, activity and adding to lean tissue it's going to you waistline

    I don't think there's such a thing as more easily burnt fat unless your referring to fat which is in the blood stream rather fat already in adipose tissue once it gets in there it's harder to ramp up metabolic procedures to get it out of there.

    Fatty foods can be absorbed in the GI tract at different rates but that's due to volume/density of fat and consistency of the food

    protein overload, I can't comment on other than having a constant concentration of all amino acids in your bloodstream, through out the day means your muscles have the necessary construction materials at all times

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    Aug 16, 2009 12:58 PM GMT
    Farts and GI distress are not the only adverse effects of too much protein. Excess protein can stress the kidneys and cause loss of calcium. Once the muscle has all the protein it needs, the body will convert the excess protein to either fat or carbs. l learned this in biochemistry 101 or one of the nutrition courses I was required to take in order to graduateicon_lol.gif. Dr Adkins believed that if you wanted to lose weight the best way would be to restrict carbs and consume more protein. The protein would eventually be converted to carbs and then be used for energy. Adkin's diet has fallen out of favor because it was not considered healthy.

    There is some evidence that the omega-3 fatty acids may promote weight loss. I'm not sure how clinically relevant this will pan out to be. Most of the hype is from supplement sites.
  • Posted by a hidden member.
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    Aug 16, 2009 1:28 PM GMT
    Fats can go as high as 11 calories per grams.
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    Aug 16, 2009 2:26 PM GMT
    Thanks guys