Deze pagina legt een bom onder zowel de
zuivel- als de sojaindustrie want als deze informatie klopt dan zijn deze eiwitten grote
aanjagers van kanker.
Volgens Dr John McDougall stimuleren zowel de soja- als koemelk
eiwitten de produktie van het menselijke groeihormoon IGF-1. Men weet uit studie dat
mensen met een lager niveau IGF-1 in hun bloed minder groeien maar ook langer leven.
Ook bij honden worden kleine honden meestal ouder. Er is op een
gegeven moment een studie gedaan naar muizen waarbij het IGF-1 level kunstmatig was
verlaagd. De muizen werder 40% ouder en bleven langer jong en gezond.
Uit studies blijkt verder dat IGF-1 de groei van je botten
stimuleert (gunstig tijdens de groei) maar ook kankergroei stimuleert. Lange mensen hebben
meer kans op darmkanker, borstkanker en worden minder oud. Uit een Engelse studie van 2002
bleek dat vrouwen die veganistisch aten 13% lagere IGF-1 levels hadden dan vegetarische
(wel zuivel) of vleesetende vrouwen.
Wat is nu het doel van melk? De mens voeden? Nee, het is bedoeld
voor een kalf dat in tijd van 6 maanden van 30 naar 300 kilo moet groeien. En daar zorgt
nu juist dat IGF-1 hormoon voor. Wat denk je dat dit bij ons kan veroorzaken naast snelle
botgroei ?
Bij een studie van 2004 op 8 jarige jongens blijkt dat 1.5 liter
magere melk bij hun de IGF-1 levels verhoogd met maar liefst 19%.
In Nederland werkt de Nederlandse dietïsten vereniging nauw samen
met de zuivelpromotie organisatie, denk je dat die dan zullen gaan zeggen dat zuivel of
soja ongezond zou kunnen zijn. Hopelijk gaat men uit eigen gelederen ook eens op onderzoek
uit naar zowel de risico's van melk en soja. Voedingcentrum idem, krijgt geld vanuit de
overheid en ook vanuit de industrie voor leerstoelen, verwacht je dat die dit gevoelige
onderwerp aan zullen snijden?
Met soja heb ik altijd al een dubbel gevoel gehad. Aan de ene kant
zegt men dat sojabonen goede voeding zijn maar ze moeten dan wel gefermenteerd zijn zoals
tofu en tempeh. Maar wat blijkt nu, als je 40 gram eiwit neemt dan zie je de volgende
stijgingen:
Eiwit uit zuivel > 36% stijging IGF-1 in het bloed
Eiwit uit soja > 69% stijging IGF-1 in het bloed
Ik denk zelf dat zuivel/soja geen kanker veroorzaken maar het wel
kunnen aanjagen als er een begin van kanker is. Leef je supergezond en heb je geen
genetische aanleg voor kanker dan zal dit probleem misschien minder spelen maar is dit
niet het geval dan kan een hoge IGF-1 voor een soort sneeuwbal effect zorgen. Het effect
zal sterker zijn bij ouderen omdat die meer cellen met schade (roken, dronken,
chemicaliën) kunnen hebben.
Ga dus zelf op onderzoek uit en lees de informatie die u kunt
vinden. Er is geen arts, voedingsconsulente, specialist die je op deze donkere zijde van
melk/soja zal wijzen ben ik bang. Ik zal studies, artikelen etc die ik hierover kan vinden
op deze pagina plaatsen. Ik ga voorlopig voor noten/groenteburgers, rijstemelk en zeer
beperkt (1-2 keer per week) biologisch vlees/wilde vette vis.
In Amerika is het probleem met de melk nog groter omdat boeren
daar rBGH (bovine growth hormone) gebruiken, een genetisch gemanipuleerde versie
van IGF als het ware.
Men doet het om de melkproduktie nog verder
te stimuleren. Het menselijk lichaam heeft receptoren voor zowel lichaamsvreemd IGF van
dieren en rBGH. Ook zijn Nederlandse melkkoeien zo gefokt dat zij een hoge melkopbrengst
en dus veel IGF hormoon produceren.
Maar nog iets, ook fluor verhoogt IGF-1
levels. Leuk voor al die mensen die fluor tabletjes moesten slikken van de tandarts. Als
voorgerecht fluor pilletjes, dan kwik in je kiezen en als toetje goedkope kronen met
palladium. Na zo'n maaltijd krijg je vanzelf (metaal) moeheid.....kan allemaal geen kwaad
hoor, jaja.....
Ron
Kanker waarschuwing mbt soja
voeding
De Cancer Council of NSW (Australische
gezondheidsorganisatie) waarschuwt kanker patiënten soja produkten te vermijden omdat zij
de groei van tumoren kunnen versnellen. Met name de hormoon-gerelateerde kankers zoals
borst- en prostaatkanker.
Sojamelk niet zo gezond? Sojamelk mogelijk
gevaarlijk? Ik kwam ervaringen tegen van ouders waarvan de kinderen veel te vroeg in de
groei waren geraakt, die veel te vroeg in de puberteit waren gekomen. Ik schrok hier echt
van, omdat onze dochter ook erg groot is voor haar leeftijd. Ze zit ver boven de
hoogste lijntjes van de groeicurves, en we waren al een aantal keer bij de schoolarts
geweest omdat die zich daarover ongerust maakte. Indien de groei niet zou afzwakken zouden
we 'er iets aan moeten gaan doen'.
Dierlijk eiwit en hormoon
gerelateerde kanker (prostaat/borst)
Ik heb al een paar keer deze relatie
genoemd maar weinig mensen nemen het verhaal helaas niet serieus. Met name bepaalde forums
voor bodybuilders (die veel eiwitshakes nemen voor spiergroei) doen het verhaal af als
onzin. Ook Atkins aanhangers (veel eiwit/vet) moeten dit maar eens lezen. Nederlandse
media zijn pro zuivel en soja dus zullen dit wel weer doodzwijgen.
Misschien dat deze "eiwit shake
experts" eens naar deze nieuwe studie moeten kijken......
Does too much protein in the diet increase cancer risk?
Study shows low-protein, low-calorie
dieters have reduced levels of hormone linked to cancer. A great deal of research connects
nutrition with cancer risk. Overweight people are at higher risk of developing
post-menopausal breast cancer, endometrial cancer, colon cancer, kidney cancer and a
certain type of esophageal cancer. Now preliminary findings from researchers at Washington
University School of Medicine in St. Louis suggest that eating less protein may help
protect against certain cancers that are not directly associated with obesity. The
research, published in the December issue of the American Journal of Clinical Nutrition,
shows that lean people on a long-term, low-protein, low-calorie diet or participating in
regular endurance exercise training have lower levels of plasma growth factors and certain
hormones linked to cancer risk.
Fontana and colleagues found
significantly lower blood levels of plasma insulin-like growth factor 1 (IGF-1) in the
low-protein diet group than in either the equally lean runners or the sedentary people
eating a standard Western diet. Past research has linked pre-menopausal breast cancer,
prostate cancer and certain types of colon cancer to high levels of IGF-1, a powerful
growth factor that promotes cell proliferation. Data from animal studies also suggest that
lower IGF-1 levels are associated with maximal lifespan.
"Our findings show that in normal
weight people IGF-1 levels are related to protein intake, independent of body weight and
fat mass," Fontana says. "I believe our findings suggest that protein intake may
be very important in regulating cancer risk."
Fontana L, Klein S, Holloszy JO. Long-term
low-protein, low-calorie diet and endurance exercise modulat metabolic factors associated
with cancer risk. American Journal of Clinical Nutrition, vol. 84; pp. 1456-1462,
December 2006.
Dr. McDougall over de Insulin-like
Growth Factor 1
John McDougall MD bespreekt hier de kankergroei promotor
(groeihormoon) IGF-1. Het niveau IGF-1 in het bloed stijgt door consumptie van zuivel
produkten, maar net zo goed door geïsoleerd soja eiwit (sojamelk). Als je dus zuivel
vermijdt vanwege mogelijke rol bij kanker dan moet je dus ook uitkijken voor sojaburgers
en sojamelk. Het alternatief is dan rijstmelk of amandelmelk.
When prostate cancer recurs, eating a
plant-based diet and reducing stress may help slow progression of the disease, a new study
shows.
The researchers investigated whether a
plant-based diet might be another way to slow the advance of recurrent prostate cancer,
because the typical "Western" diet high in animal protein and low in plant foods
has been seen to boost the progression of the disease.
IGF-1 hormone Linked to Higher Risk of
Ovarian Cancer
High levels of a protein called
insulin-like growth factor (IGF)-I may increase women's risk of developing ovarian cancer
before age 55, the results of a new study suggest.
Measuring IGF-I levels is unlikely to be
useful as a screening test for ovarian cancer, according to the study's lead author, Dr.
Rudolf Kaaks, of the International Agency for Research on Cancer in Lyon, France. However,
he told Reuters Health that the discovery of elevated levels of the growth factor in women
with ovarian cancer raises the possibility that diet, which can increase IGF-I, may be
involved in ovarian cancer.
Another mechanism linking dairy products
and prostate cancer is a very powerful growth-stimulating hormone, known as insulin-like
growth factor-1 (IGF-1). This hormone is increased in the body by the consumption of
protein, and especially animal protein. However, dairy products are the worst offenders of
all the foods we eat for raising this cancer-promoter.8 They can easily increase the
levels in our bodies by 10% from consuming amounts of dairy products commonly recommended
to keep our bones strong – and this fact comes from studies paid for by the dairy
industry.9,10 On the other hand, vegan men have been found to have a 9% lower level of
IGF-1 than men who follow a diet with meat and dairy products.11
Soy promoters often operate under a double
standard, condemning a substance in milk while praising the same compound when it occurs
in soy. One egregious example is that of Insulin-like Growth Factor-1, or IGF-1. You have
been very vociferous in your condemnation of rBGH milk because it contains high levels of
IGF-1, a compound that has been implicated as causing breast cancer.
However, you are silent when it comes to
the IGF-1 levels in soy. When they are found in soy, promoters describe them as a benefit
for bones. This is similar to the promotion of fluoride by the dental profession, while
ridiculing its serious adverse health effects.
According to findings reported by
researchers Arjmandi and Khalil, April 2001, soy increases serum IGF-1 levels. They took
64 healthy men and randomly assigned them to two groups, one that consumed 40 g of
milk-based protein a day for three months and the other that took in 40 g of soy-based
protein on the same schedule. Urine and blood samples showed that both groups experienced
an increase in a substance associated with bone formation known as insulin-like growth
factor-1.1
The group consuming soy protein had
significantly more of this growth factor, according to Arjmandi. He and Khalil presented
their findings at the Experimental Biology 2001 meeting in Orlando. "This is the
first study to show that soy may benefit skeletal health in males," Arjmandi is
quoted as saying.
It is unbelievable that an increase in
IGF-1 levels could ever be interpreted as something "beneficial," as there are
over 1900 studies on MEDLINE alone clearly showing the implications of IGF-1 in hormonal
cancers. Such is the double standard we fine in health research science.
As you know, IGF-1 is released from the
liver in response to growth hormones, etc. They act co-dependently with thyroid hormones
on many biochemical activities, especially with thyroid stimulating hormone (TSH).
In melk zitten oestrogenen en deze kunnen
vooral borstkanker stimuleren, net zoals de pil dit kan doen. Vooral de Amerikaanse
biochemicus professor Colin Campbell waarschuwt voor de gevaren van melk en het verkrijgen
van borstkanker. Publicaties in de Lancet (50) wijzen op de relatie tussen het
groeihormoon (GH), insulin-like growth factor (IGF-1)in melk en kanker. Bij een verhoging
van GH, zoals bij acromegalie bestaat, is een verhoogde kans op borst- en prostaatkanker.
Een verhoging van het IGF-1 heeft dezelfde gevaren.
Deze twee stoffen schijnen door de
pasteurisatie niet stuk te gaan en de groei van kankercellen te bevorderen. Een onderzoek
in 1981 vermeldde al dat melk kanker van prostaat en colon kon veroorzaken.
Dat Nederland de langste vrouwen van de
wereld heeft is waarschijnlijk het gevolg van de hoge melkconsumptie. Dit gebeurt nu ook
in Japan. Nadat men daar ook melk is gaan drinken zijn de vrouwen gemiddeld 11,5 cm langer
en 8,6 kg zwaarder geworden en zijn ze 3 jaar vroeger gaan menstrueren.
Dierlijke proteïnen zijn carcinogeen en
bevorderen kanker en doen dit op vele manieren. Één manier waarop dit gebeurt is door de
productie van bepaalde groeihormonen te stimuleren, een ervan heet IGF1 (Insulin like
growth factor 1) de insulineachtige groeifactor 1. Dit hebben we in onze proeven ook
kunnen meten. Dus caseïne veroorzaakt de toename van deze groeihormonen en dat stimuleert
de groei van kanker.
Een beetje erg simpel gesteld: maar het
hormoon gaat naar de cel en creëert binnen de cel een soort nieuwe set van factoren om de
groei te stimuleren. En dat gebeurt op een nogal complexe wijze maar het belangrijke,
zelfs het meest belangrijke, hiervan is dat het gebeurt, dus de IGF1 stimuleert celdeling
oftewel de vermenigvuldiging van de cel.
Welk soort kanker kan hier het gevolg van
zijn?
Het is zo dat deze bewijzen uit onderzoek
bij mensen nu pas geleverd worden, dus dat hogere waarden IGF samenhangen met bijvoorbeeld
prostaatkanker en, bij sommige onderzoeken, met borstkanker. En, aangezien alle
kankersoorten verband houden met een versnelde celdeling oftewel celgroei, hebben alle
kankersoorten deze eigenschap. Concluderend, het groeihormoon die de celgroei stimuleert
zal hetzelfde effect hebben op verschillende kankersoorten. Het feit dat we nog geen
empirische gegevens hebben voor al deze kankersoorten betekent niet dat het niet bestaat.
Alleen al op basis van de fundamentele biologie denk ik te kunnen stellen dat wij dit
uiteindelijk in verschillende mate zullen kunnen concluderen voor iedere soort kanker.
Doordat soja nu vrijwel in talrijke
producten wordt verwerkt krijgen veel mensen, die geen speciale sojaproducten kopen, het
binnen. Mensen die ook nog veel sojamelk, tofu, tempeh, sojaworstjes- en sojavlees eten,
krijgen teveel isoflavonen en dus fyto-oestrogenen binnen.
Fyto-oestrogenen zijn endocriene
verstoorders. De fyto-oestrogenen verhogen de kans op borstkanker en verstoring van de
schildklier. Omdat de fyto-oestrogenen in poedermelk voorkomt en soja vrijwel al in veel
producten voorkomt, ook in babyvoeding, is het schadelijk voor de gezondheid van de baby.
De fabrikanten weten er van.
High levels of a well-known growth factor
significantly increase the risks of colorectal, breast, and prostate cancer, medical
researchers have found.
When IGF-1 is added to dishes of cells
growing in the laboratory, the cells flourish like flowers blooming in spring. In
children, the hormone stimulates bone growth and development of organs such as the heart,
liver, and kidneys. But in older people, rapidly proliferating cells increase the
opportunity for genetic mutations that may lead to cancer. And once cancer cells begin to
form, IGF-1 will promote their growth as well as that of normal cells.
Ma mentions evidence of a connection
between colorectal cancer and acromegaly, a condition that causes enlargement of facial
features, hands, and feet due to excess secretion of growth hormone. "The rate of
colorectal cancer among acromegalics is abnormally high, because their IGF-1 levels can be
up to 10-fold higher that those of normal people," she notes.
"The levels of IGF-1 implicated in
increased risks for cancer among middle-aged and older nurses and physicians in our
studies are not as high as those in acromegalics or abnormally tall people,"
Giovannucci explains. "Rather they are at the high end of what we would consider a
normal range."
IGF-1 is a major determinant of height, and
taller people are at higher risk for colorectal, breast, and prostate cancer, according to
Ma. "It is possible that people who grow tall, because of higher levels of IGF-1 in
childhood and adolescence, have a high risk of cancer in adulthood," Giovannucci
points out. "However, someone who retains high levels of the hormone from childhood
through middle age might be at even higher risk."
Plasma insulin-like growth factor-I
and prostate cancer risk: a prospective study
Reduction of androgen action has been the
principal strategy under investigation for prostate cancer prevention. If our results are
confirmed, pharmacological approaches to decreasing IGF-I bioactivity may warrant
investigation as risk-reduction strategies specifically targeted at men at high risk due
to increased IGF-I levels. Partial suppression of the growth hormone (GH)-IGF-I axis by
somatostatin analogs or GH-releasing hormone antagonists are two possibilities. Finally,
our results raise concern that administration of GH or IGF-I over long periods, as
proposed for elderly men to delay the effects of aging, may increase risk of prostate
cancer.
Hormonal Predictors of Prostate
Cancer: A Meta-Analysis
Conclusion: Men with either serum
testosterone or IGF-1 levels in upper quartile of the population distribution have an
approximately two-fold higher risk for developing prostate cancer.
Pregnancy may lower a woman's risk of
cancer but drinking milk could raise it, researchers reported this week. Both factors, as
well as the use of hormone replacement therapy, affect levels of a hormone that may
influence the development of some cancers, a team at Brigham and Women's Hospital and
Harvard Medical School in Boston found.
Growth hormone, IGF-I and cancer.
Less intervention to avoid cancer? More intervention to prevent cancer?
The GH/IGF-I axis has a clearly established
role in somatic growth regulation and there is much evidence suggesting that it can play a
contributing role in neoplastic
tissue growth; a number of recent epidemiological reports indicate that it may also be an
important determinant of cancer incidence.
If the association between IGF-I and risk
of breast and prostate cancers is as strong as that of the gonadal steroids, as the recent
epidemiological data suggest, then this implies that manipulating IGF-I may also be
successful in reducing cancer incidence.
Fluoride may be responsible for increased
rates of breast cancer by virtue of another process: Fluoride raises levels of a hormone
called insulin-like growth factor (IGF-1). Though useful for a number of metabolic
functions, when IGF-1 levels are raised there is an increased risk of cancer.
Premenopausal women with the highest levels of IGF-1 in their blood have shown a sevenfold
increase in the risk of breast cancer. It is interesting to note that other items in the
food chain significantly raise IGF-1 levels. One of them is milk which has been treated
with Monsanto's bovine growth hormone, and the other, as you may have guessed, is soy.
Toename calcium, eiwit en soja kan
tot verhoging
IGF-1 levels leiden
Sequential, randomized trial of a low-fat,
high-fiber diet and soy supplementation: effects on circulating IGF-I and its binding
proteins in premenopausal women.
The results are compatible with previous
data suggesting that increases in dietary calcium, protein and soy, in particular, could
increase circulating levels of bioavailable IGF-I.
IGF-I, IGFBP-3 and breast cancer
risk in women: The European Prospective Investigation into Cancer and Nutrition (EPIC).
This study confirms previous findings for
an association of serum IGF-I and IGFBP-3 concentrations with breast cancer risk,
particularly for women with a later diagnosis of cancer, but it does not support the
hypothesis of an involvement of IGF-I in younger women.
Insulin-like Growth Factor I in
Pregnancy and Maternal Risk of Breast Cancer
The study offers further evidence that
IGF-I is important in breast cancer. Our findings suggest that the adverse effect of IGF-I
on the breast may be stronger before the remodeling of the gland induced by a first
pregnancy. (Cancer Epidemiol Biomarkers Prev 2006;15(12):2489-93).
Factors associated with circulating
levels of insulin-like growth factor-I and insulin-like growth factor binding protein-3 in
740 women at risk for breast cancer.
We conclude that circulating IGF-I levels
are higher in women with prior breast cancer compared to unaffected women, and that IGF-I
and/or IGFBP-3 levels are influenced by age and by reproductive and hormonal factors.
These findings support their putative role as breast cancer risk biomarker.
Professor Tim Key, Cancer Research UK,
Cancer Epidemiology Unit, The Radcliffe Infirmary, Oxford
The main hormone-related cancers are those
of the breast, prostate, ovary and
endometrium. Of these, the best evidence for a chemoprevention strategy is for
breast cancer, either by blocking the effects of oestradiol (by tamoxifen, raloxifene) or
by reducing circulating levels of oestradiol (using aromatase inhibitors [in
postmenopausal women] and LHRH agonists [in pre-menopausal women]). Other
hormones that are linked with an increased risk of breast cancer are insulin-like
growth factor (IGF-1) and progesterone (e.g. in Hormone Replacement Therapy).
High parity and breastfeeding offer protection.
For prostate cancer, the hormonal
association is less straightforward. Blood tests
show no difference in blood testosterone levels between men with and without
prostate cancer (compared to a 15% difference in oestrogen in women with breast
cancer). This may possibly be due to the fact that the form of testosterone found in
the prostate (DHT) is 100 times more active than that found in the blood. However,
there may again be a role for IGF-1, as this is 6% higher in men with prostate cancer.
The potential for chemoprevention is being studied in a large US trial of finesteride,
which can prevent active testosterone in the prostate. Other strategies might include
blocking the androgen receptor and reducing IGF-1. For the latter, a dietary strategy
might be considered, although the evidence is restricted to vegan diets, where a 10%
difference is seen.
Diets high in fat and animal
protein linked to increased risk of non-Hodgkin's lymphoma
Consuming foods high in animal protein,
saturated fat, eggs and dairy leads to an increased risk of developing non-Hodgkin's
lymphoma (NHL), a cancer that attacks the lymphatic system, part of the body's immune
system, Yale researchers have found.
Published in the American Journal of
Epidemiology, the study also showed that diets high in dietary fiber -- tomatoes,
broccoli, mixed lettuce salad with vegetables, cauliflower, etc.-- were associated with a
reduced risk of NHL.
"An association between dietary intake
and NHL is biologically plausible because diets high in protein and fat may lead to
altered immunity, resulting in increased risk of NHL," said principal investigator
Tongzhang Zheng, M.D., associate professor of epidemiology and environmental health at
Yale School of Medicine. "The antioxidants found in vegetables and fruits may result
in reduced risk of about 40 percent."
The study was conducted between 1995 and
2001 on 601 Connecticut women between the ages of 21 and 84 diagnosed with varying
subtypes of NHL. Using a Food Frequency Questionnaire (FFQ) developed by the Fred
Hutchinson Cancer Research Center, each participant was asked to characterize her usual
diet in the year prior to being interviewed. The FFQ collects consumption frequency and
portion size data for approximately 120 foods and beverages and is periodically updated to
reflect U.S. food consumption patterns and major market changes. After completion, the FFQ
was sent to the Fred Hutchinson Cancer Research Center for calculating average daily
nutrient intakes. The study included a control group of 717 women.
"So far, risk of NHL associated with
animal protein and fat intakes has only been investigated in American women, in three
studies," said Zheng. "If the association could also be demonstrated in American
men, it would provide important information towards understanding the cause of NHL."
Insulin-like growth factor I
(IGF-I), IGF-binding proteins, and
breast cancer.
In premenopausal women, elevated serum
IGF-I and IGFBP-3 are associated with increased breast cancer risk, whereas elevated serum
IGFBP-2 is inversely associated with risk of postmenopausal breast cancer.
Premenopausal levels of circulating
insulin-like growth factor I and the risk of postmenopausal breast cancer
The association between circulating levels
of IGF-I and postmenopausal breast cancer risk may be modified by age. Increased levels of
circulating IGF-I may be of particular interest in the younger premenopausal women and
older postmenopausal women. Age-stratification should be undertaken in larger
investigations of IGF-I levels as predictors of postmenopausal breast cancer.
IGF-1 en insuline beschermen
darmkankercellen tegen celdood
Resistance of cancer cells against
apoptosis induced by death factors contributes to the limited efficiency of immune- and
drug-induced destruction of tumors. We report here that insulin and insulin-like growth
factor-I (IGF-I) fully protect HT29-D4 colon carcinoma cells from IFN-gamma/tumor necrosis
factor-alpha (TNF) induced apoptosis.
A
prospective study of serum insulin-like growth factor-I (IGF-I), IGF-II, IGF-binding
protein-3 and breast cancer risk
These data are compatible with the
hypothesis that premenopausal women with a relatively high circulating concentration of
IGF-I and low IGFBP-3 are at an increased risk of developing breast cancer.
An early small case-control study Greece
(1), as well as a more recent larger case-control study in Sweden (2) also found positive
associations between IGF-I concentrations and the risk of prostate cancer.
1. C. S. Mantoros et al., Br. J. Cancer 76,
1115 (1997).
2. A. Wolk et al., J. Natl. Cancer Inst. 90, 876 (1998).
Soja marketing onzin.....
Marketers of soy products would like us to
believe that Asians have good health because they eat a "soy-based" diet. This
simply is not true. In China the daily consumption of soy is about two teaspoons. In Japan
it is about two ounces a day. In China they get most of their protein from pork. For the
Japanese, it is from fish. In fact, the Japanese eat more eggs than they do soy. They eat
more eggs than anyone in the world, followed closely by the Chinese. It is curious that
the egg sellers didn't capitalize on this. They could have said, "Be healthy, eat
like the Japanese, eat more eggs!"
Soy in Japan is used merely as a side dish
or condiment, and the form of soy they consume makes a big difference. They mostly consume
fermented soy products like tempeh, miso, and natto. The fermentation process alters soy
in such a way that the natural toxins, antinutrients, and goitrogens are neutralized, and
the isoflavones are made beneficial-- or at least, less harmful.
Animal-based nutrients
linked with higher risk of stomach and esophageal cancers
Yale School of Medicine researchers have
found that a diet high in cholesterol, animal protein and vitamin B12 is linked to risk of
a specific type of cancer of the stomach and esophagus that has been increasing rapidly.
The researchers also found that plant-based
nutrients such as dietary fiber, dietary beta-carotene, folic acid, vitamin C and vitamin
B6 were associated with lower risk of these kinds of cancers. They further found that
regular use of vitamin C supplements was associated with a 40 percent reduction in the
risk of cancer in the middle and lower parts of the stomach.
The rate of a specific type of esophageal
and stomach cancer, known as adenocarcinoma of the esophagus and gastric cardia, has
increased by 300 percent since the mid-1970s, according to lead author Susan Mayne,
associate professor in the Department of Epidemiology and Public Health at Yale School of
Medicine, and associate director of the Yale Cancer Center. To identify reasons for this
rapid increase, the United States National Cancer Institute launched a large study at
three centers, including Yale, the University of Washington and Columbia University.
The researchers interviewed patients
throughout Connecticut, New Jersey and western Washington State and compared the nutrient
intake of 1,095 people with stomach or esophageal cancer to that of 687 healthy people in
a control group. The team also looked at the participants' use of nutrient supplements.
Their results are published in the October issue of Cancer Epidemiology, Biomarkers &
Prevention.
"We found that many animal-based
nutrients found in foods of animal origin are strongly associated with risk of developing
these types of cancers and we were able to identify nutrients that presumably would be
protective," said Mayne. "We also found that regular users of vitamin C
supplements were at significantly lower risk of stomach cancer."
In a separate analysis of these data, the
research team found that obesity is strongly linked with risk of these cancers. "The
increase in the prevalence of obesity in the United States certainly contributes to the
time trends," said Mayne. "Our results suggest that prevention strategies for
these cancers should emphasize increased consumption of plant foods, decreased consumption
of foods of animal origin with the possible exception of dairy products, and control of
obesity."
Higher intake of vegetable protein
associated with lower blood pressure levels
People who eat more protein from vegetables
tend to have lower blood pressure, according to a new study in the January 9 issue of
Archives of Internal Medicine, one of the JAMA/Archives journals.
Most adults have either high blood pressure (hypertension) or prehypertensive blood
pressure levels, according to background information in the article. Previous studies have
found evidence that meat eaters generally have higher blood pressure than vegetarians.
Other research looked directly at the effect of high overall protein intake and found that
people with higher total protein intake are likely to have lower blood pressure, the
authors report.
Paul Elliott, M.B., Ph.D., from Imperial
College London, and colleagues analyzed data from the INTERMAP study, which included 4,680
people (2,359 men and 2,321 women) aged 40 to 59 years from four countries. They measured
each participant's systolic and diastolic blood pressure eight times at four visits in a
three- to six-week period. Each person wrote down everything they had eaten and drank
during the previous 24 hours, including dietary supplements, at each visit. Urine samples
were also taken on the first and third examinations.
Judging by their food records and urine
samples, those who ate more vegetable protein were more likely to have lower blood
pressure than those who ate less vegetable protein. Though the researchers noted a slight
association between animal protein and high blood pressure, this link disappeared when
they accounted for participants' height and weight. There was no link between total
protein intake and blood pressure, in contrast to previous studies.
The researchers are unsure exactly how
vegetable proteins might affect blood pressure, but note from their data that amino acids
may play a role. Some of these building blocks of protein have been shown to influence
blood pressure, and different amino acids were present in diets high in vegetable protein
than in those that contained more animal protein. Other dietary components of vegetables,
such as magnesium, also may interact with amino acids to lower blood pressure.
"Our results are consistent with
current recommendations that a diet high in vegetable products be part of a healthy
lifestyle for prevention of high blood pressure and related chronic diseases," the
authors write. "Definitive ascertainment of a causal relationship between vegetable
protein intake and blood pressure awaits further data from randomized controlled trials,
especially regarding the effect of constituent amino acids on blood pressure."
