Re: Who is willing to do the "Supersize Me" experiment with fish oil?
- From: Ron Peterson <ron@xxxxxxxxxxxxxx>
- Date: Sat, 13 Oct 2007 08:51:21 -0700
On Oct 5, 10:53 am, Ron Peterson <r...@xxxxxxxxxxxxxx> wrote:
Int J Vitam Nutr Res. 2002 Jan;72(1):53-9. indicates that fat intake
is needed for absorption of fat soluble vitamins,
A typo on my part. I meant to say that fat intake isn't needed for
absorption of fat soluble vitamins.
"In this review the effects of lifestyle factors, especially alcohol
consumption, on vitamin bioavailability are summarized and discussed.
Alcohol effects are clearly dose-dependent. Excessive chronic alcohol
intake is generally associated with vitamin deficiency (especially
folate, thiamine, and vitamin B6) due to malnutrition, malabsorption,
and ethanol toxicity. Effects of moderate alcohol use are mainly
explained by a lower vitamin intake. In the case of vitamin A and beta-
carotene, effects on post-absorptive (lipoprotein) metabolism have
been demonstrated. In one diet-controlled crossover study, alcohol
consumption resulted in an increase in the plasma vitamin B6 (PLP)
content, especially after beer consumption (containing vitamin B6),
but also after wine and spirit consumption (not containing vitamin
B6). Smoking is also associated with a lower dietary vitamin intake.
In the case of vitamin C, B12, folate, and beta-carotene, evidence has
been presented for effects on postabsorptive metabolism, due to smoke-
induced oxidative stress and/or vitamin inactivation. For vitamin E a
direct effect of smoking on absorption has been demonstrated.
There is
no convincing evidence that low-fat diets negatively affect fat-
soluble vitamin absorption,
but cholesterol-lowering compounds
(diets), or unabsorbable fat substitutes, may do so. Vitamin
bioavailability may be compromised from certain vegetables
(particularly raw), and/or from high-fiber foods, because of limited
digestion and inefficient release of vitamins from the food matrix."
--
Ron
.
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