Iwon\(k\)a <i...@p...onet.pl> napisał(a):


> moze inaczej popatrz na slowo "ograniczenie". bo jakos w nim nie
> widze "sladowe". wiesz kazdy interpretuje tekst pisany czy tez
> rysunki jak potrafi. to, ze zrzoumiano role chloesterolu endogennego
> nie musi od razu oznaczac iz, ten egzogenny mozna teraz jesc
> w nieograniczonych ilosciach.

Masz racje, bo tak jest dokladnie.....Ludzie roznia sie tzw., wrazliwoscia
(genetycznie uwarunkowana) na cholesterol egzogenny.

Ocenia sie w tej chwili, ze ok. 30 % ogolnej populacji ludzi, ma zaklocony
wewnetrzny monitoring mechanizmu, pozwalajacego na zmniejszenie produkcji
cholesterolu endogennego w przypadku zwiekszonej podazy cholesterolu ( czyli
ch.egzogennego).

Zreszta precyzyjniej ten problem opisuje ponizszy tekst:



Homemade versus dietary cholesterol. For most people, about eighty percent of
the cholesterol in their blood is made by their own body, with the rest coming
from their diet. In fact, your body needs cholesterol so much that it makes
around 3,000 milligrams per day that's ten times the maximum recommendation
for daily dietary cholesterol. It is estimated that around thirty percent of
people are sensitive to the cholesterol-raising effects of dietary
cholesterol. Normally, when a healthy person eats high cholesterol foods, the
liver reduces its own cholesterol production to keep blood cholesterol at a
healthy level. In cholesterol-sensitive individuals, this internal monitoring
mechanism doesn't operate, so that their blood cholesterol level goes up when
they eat high-cholesterol foods.

One theory that explains cholesterol sensitivity is humans are by nature
vegetarians. Originally, human bodies were not genetically equipped to
metabolize dietary cholesterol, since plants are cholesterol-free. As the
human diet began to include animal products, some people's bodies developed
metabolic ways to dispose of excess cholesterol and some didn't. People who
descended from the ones that didn't adapt are the cholesterol-sensitive ones.
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Ponadto istnieja powazne (hormonalnie uzasadnione) roznice pomiedzy
mezczyznami i kobietami w zakresie mozliwosci wytwarzania cholesterolu HDL:



Gender differences of cholesterol. Women tend to have higher levels of HDL
than men, since female sex hormones release HDL and male sex hormones lower HDL.
At menopause, estrogen production drops, and so does HDL. Just another
mid-life biochemical quirk that should stimulate menopausal-age women to start
an HDL-raising exercise program.

-------
Jeff


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