Essential amino acid requirements
scotty99nospam at earthlink.net
Tue Dec 14 20:26:51 EST 1999
Stuart Dunn wrote:
> Siemel B. Naran wrote:
> > On Mon, 13 Dec 1999 10:33:23 -0600, River Mouse
> > >Without all eight of the essential amino acids present, your body CANNOT do
> > >anything with that protein except break it down to synthesize the
> > >nonessential proteins and treat any surplus like fat.
> > Well, the body may burn some muscle to make up for the difference (ie, for
> > whatever amino acids are lacking). Then the protein you eat is fully usable.
> > But of course, we don't want this.
> > >Whey | Soy | Egg | Rice | EAA
> > >-----+-----|-----|------|----------
> > > 6.8 | 4.3 | 4.5 | 4.2 | L-Isoleucine
> > >10.9 | 7.2 | 6.8 | 8.6 | L-Leucine
> > > 9.5 | 5.5 | 5.5 | 3.5 | L-Lysine
> > > 2.5 | 1.2 | 2.7 | 2.4 | L-Methionine
> > > 3.1 | 4.6 | ? | 5.2 | L-Phenylalanine
> > > 8.3 | 3.3 | 3.6 | 3.6 | L-Threonine
> > > 2.0 | 1.1 | 0.9 | 1.3 | L-Tryptophan
> > > 6.4 | 4.4 | 5.1 | 4.7 | L-Valine
> > >If methionine is the limiting factor, you'll need over twice as much soy
> > >protein as you'd need whey protein to get the same usable EAA.
> > >
> > >Look at lysine, and you'll see that you need about three times as much rice
> > >as you'd need whey.
> > If you eat twice as much soy, you get twice as much of every amino acid.
> > Which means too much protein, and therefore lots of work on your kidneys
> > to get rid of the excess protein/nitrogen.
> Thanks to the terrible job of health education that government run, tax
> supported, "public" schools are doing, you have been misinformed. The
> reason why they gave meat and dairy products their own food groups was
> to help livestock farmers. Until you buy a calorie counter that lists
> the amounts of amino acids in different foods, and until you go to
> Walton Feeds website, you just won't know what you're talking about.
> It's not the ratios of different amino acids in your blood that matter.
> You have enough of each amino acid in your blood to form the right
> proteins for tissue growth. Eight of these must be supplied by the food
> you eat, thirteen can be synthesized by your body if your food doesn't
> provide enough of them, and nutritionists currently classify histidine,
> the twenty-second amino acid, as only being essential for infants,
> meaning that babies need to get it from breastmilk or infant formula,
> but the rest of us don't have to worry about it. Now, in order to avoid
> muscle atrophy (the first noticible symptom of a protein deficiency) you
> need to replenish your amino acid pool on a regular basis. To do this,
> all you have to do is eat at leaast two meals a day, maintain your body
> weight, avoid eating abnormally large quantities of sugary fruit, and
> restrict your consumption of junk food. By the way, the chart I am
> talking about tells how many calories of any given food a 174 pound man
> (that's about average in the US) would have to eat to get his RDA of all
> eight amino acids. After looking at the chart, a person realizes that it
> is not neccessary for even the strictest vegetarian to carefully combine
> proteins. In fact, vegetarians and meat eaters alike are getting way too
> much protein.
> > >Some foods are heavier in sources than others. Since I want to rely largely
> > >on soy sources for protein for the time being, I'm trying to find vegan
> > >foods which are balanced in favor of lysine, methionine, threonine and
> > >tryptophan to make up the difference.
> According to the chart, if you weigh 174 pounds and you are an adult,
> you would only need to eat 304 calories of soybeans to get enough of
> each amino acid. If you eat fake meat made with soy protein, that number
> would be even lower because most of the carbohydrates and fat would be
> removed. I imagine you are smaller than 174 pounds, anyway.
> Peas and lentils are supposedly
> > >heavier in these, so the combination of peas and soy protein may result in
> > >something like whey's balance.
> No, you don't need to balance amino acids. Read the American Dietetic
> Association's position paper on vegetarianism.
> > Grains are high in methionine, and maybe the others. So wheat cereal and
> > soy milk is probably a good choice.
> If you ate nothing but wheat and fit the description above, you would
> need 1061 calories to get your amino acids.
> I use tofu in my spaghetti (because
> > it tastes good to me), and this might be balance too because tofu is soy
> > and sphaghetti is grain.
> Combining proteins is like combining vitamins to get a "complete B
> Complex" or "complete tocopherol."
> > >Mind you - that's -whey's- balance. I'm still looking for a source of
> > >information on what ratios a body really needs.
> Adults need 12mg of Isoleucine per kg of body weight, 16mg of Leucine
> per kg, 12mg of Lysine per kg, 10mg per kg of Methionine and/or Cystine,
> 16mg per kg of Phenylalanine and or Tyrosine, 8mg per kg of Threonine,
> 3mg per kg of body weight of Tryptophan, and 14mg per kg of Valine. One
> kg is about a pound.
Anyone have any data on the protein profile of mealworms? There great for shakes,
baked goods, dry roasted treats, or just plain stir fried.
More information about the Proteins