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Science Forum Index » Medicine - Nutrition Forum » Unrefined, unprocessed, real animal fats are healthy
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| TC |
 Posted: Thu Mar 01, 2007 3:29 pm |
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http://www.medicalnewstoday.com/healthnews.php?newsid=64192
Reduced Fertility In Women Linked To Low Fat Dairy Food
01 Mar 2007
A new US study suggests that eating low fat dairy food every day can
reduce a woman's fertility by affecting ovulation.
The study is published in the journal Human Reproduction.
Researchers from Harvard School of Public Health and Brigham and
Women's Hospital and Harvard Medical School, Boston, followed 18,555
married, premenopausal women aged between 24 and 42, with no history
of infertility, who were either trying to become pregnant or became
pregnant over an 8 year period from 1991 to 1999.
The study was led by Dr Jorge Chavarro, a research fellow in the
Department of Nutrition at Harvard School of Public Health.
The women were part of a cohort of 116,000 women in The Nurses' Health
Study II.
Their dietover the 8 years was assessed with questions about type and
frequency of dairy food intake. They were also asked questions about
the regularity of their menstrual cycle, whether they had been
diagnosed with ovulation failure, and whether they had been trying to
conceive and with what success.
438 women reported ovulatory disorders during the period of the study.
The study showed that women who ate more than two portions a day of
low fat dairy foods were 85 per cent more likely to be infertile due
to ovulatory disorders than those who only ate it less than once a
week.
Conversely they found that women who ate full-fat dairy foods,
including ice cream, more than once per day had a 25 per cent reduced
risk of infertility due to ovulatory disorders compared to those who
ate full-fat dairy foods only once a week.
Previous studies have suggested that dairy foods can interfere with
ovulation, but few of them have been on humans and they are
inconsistent. The researchers in this study wanted to assess to what
extent the fat content of dairy foods in a woman's diet might be
linked to infertility due to ovulation problems.
The researchers concluded that "High intake of low-fat dairy foods may
increase the risk of anovulatory infertility whereas intake of high-
fat dairy foods may decrease this risk".
The study found no links between normal intake of lactose, vitamin D,
calcium and phosphorous and infertility due to ovulation disorders.
Dr Chavarro's advice to women trying to conceive is to change their
diet for a while. He said "They should consider changing low-fat dairy
foods for high-fat dairy foods; for instance, by swapping skimmed milk
for whole milk and eating ice cream, not low fat yoghurt."
But it was important to do this without increasing their daily calorie
intake or upsetting the balance of overall saturated fat consumption,
he said.
"Once they have become pregnant, then they should probably switch back
to low-fat dairy foods as it is easier to limit intake of saturated
fat by consuming low-fat dairy foods," said Dr Chavarro.
The researchers suggest that a fat-soluble substance in the full-fat
dairy foods could be responsible for improved ovarian function, and
that this substance is removed when full-fat dairy produce is
converted to low-fat.
There could be other reasons too, to do with hormone balance. For
instance, when full-fat milk is processed to give skimmed milk, whey
protein is usually added back in to improve taste and colour. In tests
with mice, whey protein is suspected of increasing testosterone-like
effects.
"A prospective study of dairy foods intake and anovulatory
infertility."
J.E. Chavarro, J.W. Rich-Edwards, B. Rosner, and W.C. Willett.
Advance Access published online on February 28, 2007
Human Reproduction, doi:10.1093/humrep/dem019
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TC |
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| Enrico C |
| Posted: Fri Mar 02, 2007 4:06 pm |
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[...]
Quote: There could be other reasons too,
[...]
For instance, I guess that low-fat foods are eaten by overweight and
unhealthy people more often than by the fit and healthy. |
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| TC |
| Posted: Sun Mar 04, 2007 5:52 pm |
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On Mar 2, 2:06 pm, Enrico C <use_replyto_addr...@devils.com> wrote:
Quote: [...]> There could be other reasons too,
[...]
For instance, I guess that low-fat foods are eaten by overweight and
unhealthy people more often than by the fit and healthy.
The old cartoon has two fat ladies sitting there eating cake, one says
"If everything is so low fat, why aren't we?".
TC |
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| Guest |
| Posted: Sun Mar 04, 2007 11:44 pm |
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On Mar 2, 2:06 pm, Enrico C <use_replyto_addr...@devils.com> wrote:
Quote: [...]> There could be other reasons too,
[...]
For instance, I guess that low-fat foods are eaten by overweight and
unhealthy people more often than by the fit and healthy.
Please! Despite what TC tries to continually convince himself,
animals fat are not the end-all of nutrition. These overweight people
are also gulping down lots of greasy cheeseburgers, fried chicken,
sour cream, deep-fried fish, whole milk, and hotdogs.
Patrick
(Following a low/lower fat diet for 20+ years and still sporting a 30"
waist.) |
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| TC |
| Posted: Mon Mar 05, 2007 11:26 am |
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On Mar 4, 9:44 pm, NoOptio...@aol.com wrote:
Quote: On Mar 2, 2:06 pm, Enrico C <use_replyto_addr...@devils.com> wrote:
[...]> There could be other reasons too,
[...]
For instance, I guess that low-fat foods are eaten by overweight and
unhealthy people more often than by the fit and healthy.
Please! Despite what TC tries to continually convince himself,
animals fat are not the end-all of nutrition. These overweight people
are also gulping down lots of greasy cheeseburgers, fried chicken,
sour cream, deep-fried fish, whole milk, and hotdogs.
Patrick
(Following a low/lower fat diet for 20+ years and still sporting a 30"
waist.)
I never said they were the end-all of nutrition. You guys are so
bereft of viable arguments that you all seem compelled to twist my
words around.
What I am saying, plain and simple, is that animal fats from properly
raised animals are much healthier than highly processed vegetable
oils.
TC |
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