Alvleesklierkanker gebruikt
fructose, zoals in westers voedsel voorkomt om tot groei te komen
Alvleesklierkankers gebruiken
fructosesiroop, zoals die in veel westers voedsel voorkomt, om een weg te effenen die er
voor zorgt dat celdeling versneld, volgens een studie van UCLA's Jonsson Comprehensive
Cancer Center. Alhoewel breed bekend is dat kanker glucose gebruikt, een simpele suiker,
om de groei te bevorderen,is dit de eerste keer dat er een verband is aangetoond tussen
kankergroei en fructose, volgens een onderzoek van Dr. Anthony Heaney, een professor in de
medicijnen en neurochirurgie van
Jonsson Cancer Center. Tussen 1970 en 1990 is het gebruik van HFCS met meer dan 1000%
toegenomen volgens een artikel in april 2004, uitgegeven door American Journal of Clinical
Nutrition. Voedsel producenten gebruiken HFCS,een mengsel van fructose en glucose, omdat
het goedkoop is, makkelijk te vervoeren en te bewaren. En door het hoge zoetgehalte, is
het kostendrukkend voor bedrijven om kleine hoeveelheden HFCS te gebruiken ipv duurdere
alternatieven.
De vetcellen van jonge mensen in de
groei worden vetter door fructose
Uit een laboratoriumonderzoek is gebleken,
dat fructose zorgt dat vetcellen van kinderen in de groei overgaan in buikvet in plaats
van te reageren op insuline. Het resultaat is een verhoogd risico op hartaandoeningen en
type 2 diabetes. Voorlopers van buikvetcellen van 32 kinderen met een gezond gewicht, die
nog niet begonnen waren aan de pubertijd, werden opgemeten. De onderzoekers ontdekten dat
fructose in de vorm van high-fructose corn syrup (glucose-fructose siroop / maissiroop_ in
limonades en bewerkte voedingsmiddelen een andere uitwerking had op de vetcellen dan
glucose of gewone tafelsuiker. De resultaten werden gepresenteerd op The Endocrine
Society’s 92nd Annual Meeting en geven aan dat fructose meer effect heeft op
metabolische hartaandoeningen bij kinderen in de groei dan bij volwassenen.
De zoetstof glucose-fructosestroop, ook
bekend als glucose- fructose siroop of HFCS, wordt in verschillende producten gebruikt.
Frisdranken, koekjes, chips, snoep en ijs zitten er vol mee. In de jaren tachtig begon de
Verenigde Staten en Canada de maissiroop (glucose fructose stroop) te verwerken in
producten.
Robert Lustig yells at Gary Taubes
about ignoring dangers of Fructose sugar
Robert H. Lustig, MD, UCSF Professor of
Pediatrics in the Division of Endocrinology, explores the damage caused by sugary foods.
He argues that fructose (too much) and fiber (not enough) appear to be cornerstones of the
obesity epidemic through their effects on insulin.
Robert H. Lustig interviewed about
fructose
Interview with Robert H. Lustig, MD, UCSF
Professor of Pediatrics in the Division of Endocrinology about the dangers of fructose.
Watch how the corn industry tries to defend themselves.
Fructose leads to high blood
pressure
Roken van sigaretten en fructose
consumptie verergert leverziekte
Recente studies laten zien dat
risicofactoren die aan te passen zijn zoals het roken van sigaretten en fructose
consumptie kunnen NAFLD ofwel non-alcoholische vette leverziekte verergeren. Met NAFLD,
hoopt vet zich op in de lever van mensen met overgewicht ondanks dat ze weinig alcohol
drinken. Dit veroorzaakt in sommige gevallen littekens op de lever die kunnen leiden tot
het falen van de lever. Het vaststellen en het aanpassen van de risicofactoren die
bijdragen tot de verergering van de ziekte is van essentieel belang om tot een verbetering
te leiden. Details van deze studies zijn gepubliciteerd in de mei uitgaven van Hepatology,
een tijdschrift van de American Association for the Study of Liver Diseases (AASLD). NAFLD
is de meest voorkomende oorzaak van leverziekte wereldwijd en onderzoek laat zien dat de
gevallen zal stijgen omdat een toenemende trend een vetter dieet, overgewicht en minder
lichaamsbeweging en dus een toename in diabetes patienten is. Eerdere studies geven een
indicatie dat meer dan 30 miljoen Amerikanen NAFLD hebben en ongeveer 8 miljoen hebben
mogelijk non-alcoholische steatohepatitis (NASH).
Ray Peat, a brilliant researcher, has been
led to believe that fructose and sucrose, which is 50% fructose, are advantageous over
starch and glucose due to the fact that they do not cause insulin to rise as high as well
as other properties. 180degreehealth tends to disagree, mostly because of fructose's
impact, or lack thereof, on the hormone leptin.
Fructose syrup - the cause of
diabetes
High fructose corn syrup is the primary
sweetener found in numerous foods and beverages such as non-diet soda, baked foods, and
condiments. Many food manufacturers prefer the syrup because it is economical, sweeter and
easy to blend into beverages. He found high levels of reactive carbonyls that are believed
to cause tissue damage through unbound fructose and glucose molecules. By comparison,
table sugar does not have reactive carbonyls because its chemical compounds are bound and
stable.
Studie - glucose-fructose siroop
zorgt voor aanzienlijke gewichttoename en verhoging van circulerende bloedvetten
Een zoet probleem: Onderzoekers van de
Princeton Universiteit tonen aan dat maissiroop (glucose-fructose siroop) met een hoog
fructose gehalte een directe en aanzienlijke bijdrage leveren aan gewichtstoename. Een
onderzoeksteam van de Princeton Universiteit heeft aangetoond dat niet alle zoetigheid
evenveel bijdraagt aan gewichttoename: Ratten met toegang tot een maissiroop
(glucose-fructose siroop) met een hoog fructosegehalte ontwikkelden beduidend meer gewicht
dan degenen die toegang hadden tot tafelsuiker, zelfs wanneer hun complete calorie-inname
hetzelfde was.
Part 2 on how fructose effects the hormones
leptin and insulin
Suiker - de bittere waarheid - de
rol van fructose bij oa buikvet
Petra
Naar aanleiding van deze video nog even
deze link: Fructose slechter dan glucose
De suiker fructose is ongezonder dan
glucose voor dikke mensen die nog steeds wat te veel eten. Fructose leidt tot meer
vetopslag op de buik (wat slecht is voor het hart) en tot insuline- en bloedsuikerwaarden
die op beginnende diabetes type 2 lijken.
Fructose is de booster van diabetes bij
kids, de sloper van je nieren, aanjager van buikvet. Als je meer wilt weten over de rol
van dit populaire zoetmiddel van de industrie lees dan eens het boek The Sugar Fix. Verder
bestaat witte suiker ook voor de helft uit fructose en zijn vruchtensapjes zoals appelsap
ware fructosebommen. Ook bestaan veel sapjes in de winkel voor een groot gedeeltje uit
apppelsap. Dus wil je afvallen drink dan voornamelijk water en kruidenthee, groene thee en
zeer beperkt koffie.
De "natuurlijke" zoetstof HFCS blijkt een metalen randje te hebben, en wel van
kwik. Ons hoofdartikel van deze maand doet een schokkende onthulling over
glucose-fructosestroop op basis van maïsstroop, ook wel HFCS (High Fructose Corn Syrup)
genoemd, een alomtegenwoordige zoetstof die wordt gebruikt in allerlei voedingsmiddelen
van cola tot "gezonde" tussendoortjes. Deze zoetstof blijkt kwik te bevatten dat
onbedoeld tijdens het productieproces wordt toegevoegd. Glucose-fructosestroop wordt zo
veel gebruikt, en het spul is zo vervuild met kwik, dat de meeste mensen, zelfs wanneer ze
zogeheten "natuurlijke"; voorbewerkte maaltijd onderdelen en tussendoortjes
eten, gemiddeld zo'n 28,5 mcg kwik per dag binnen kunnen krijgen. De gemiddelde Amerikaan
krijgt er jaarlijks maar liefst 19 kg van binnen.
Mercury In 1000s Of Foods
Containing High Fructose Corn Syrup
Frisdrank gezoet met fructose
vergroot kans op hart- en vaatziekten bij overgewicht
In summary, consumption of
fructose-sweetened beverages increased postprandial TAG and fasting apoB concentrations,
and the present results suggest that long-term consumption of diets high in fructose could
lead to an increased risk of CVD.
Fructose metabolism more
complicated than was thought
A new University of Illinois study suggests that we may pay a price for ingesting too much
fructose. According to lead author Manabu Nakamura, dietary fructose affects a wide range
of genes in the liver that had not previously been identified. Chances are you consume
quite a bit of fructose. Most Americans do—in refined sugars such as sucrose or table
sugar (which is half fructose) and in high-fructose corn syrup, used in products as
diverse as soft drinks, protein bars, and fruit juice. But many scientists believe that
high dietary fructose contributes to the development of metabolic syndrome, a group of
risk factors that predict heart disease and Type 2 diabetes. "For this reason, it's
important for scientists to understand exactly how consuming high amounts of fructose
affects human health," said Nakamura, a U of I associate professor of food science
and human nutrition.Nakamura's lab is continuing to study the metabolism of fructose with
an eye to making recommendations about its dietary use. His study shows that the
metabolism of fructose is more complex than the data had indicated. "Our
gene-expression analysis showed that both insulin-responsive and insulin-repressive genes
are induced during this process. Our bodies can do this, but it's complicated, and we may
pay a price for it," he said. According to the scientist, most carbohydrates are
handled fairly simply by our bodies. They are converted quickly to glucose and used for
energy or stored as fat. "When we are eating, blood sugar--and insulin
production--goes up. When we sleep or fast, it goes down," he said. The process is
not so simple with fructose, he noted. "In order for fructose to be metabolized, the
body has to create both fasted and fed conditions. The liver is really busy when you eat a
lot of fructose."
“HFCS acts like a drug,” Avaness says. “It causes sudden bursts of energy
which quickly bottom out. It can cause headaches and contribute to feelings of depression.
Furthermore, HFCS is a disaster in the digestive system, as it robs the body of vital
nutrients that could have been absorbed and utilized.”
Fructose Can Be Dangerous For
Kidneys, Study Finds
Researchers from the University of Florida, led by Michael Gersch, M.D., discovered that
after six weeks, rats on a high-fructose diet (60%) had significantly larger kidneys and
more kidney malfunction than did two other groups of rats -- one fed 60% dextrose and
another fed a standard rat diet (whatever that might be).
Suspicion is growing that fructose -- found in fresh fruit, fruit juice and preserves --
is fueling the obesity epidemic. A US study has found that overweight adults who were
given large amounts of fructose in their diet had an alarming increase in intra-abdominal
fat -- which causes a pot belly and has been linked to an increased risk of diabetes and
cardiovascular disease. The study, announced at a meeting last week, did not find the same
results with a test group consuming glucose instead.
Limiting fructose may boost weight
loss, UT Southwestern researcher reports
One of the reasons people on low-carbohydrate diets may lose weight is that they reduce
their intake of fructose, a type of sugar that can be made into body fat quickly,
according to a researcher at UT Southwestern Medical Center.
Study links soft drinks and fruit
drinks with risk for diabetes in African-American women
Researchers from Boston University's Slone Epidemiology Center have found that regular
consumption of sugar-sweetened soft drinks and fruit drinks is associated with an
increased risk for type 2 diabetes in African-American women. These findings appear in the
July 28 issue of Archives of Internal Medicine.
Too much fructose could leave
dieters sugar shocked
Dieters should focus on limiting the amount of fructose they eat instead of cutting out
starchy foods such as bread, rice and potatoes, report University of Florida researchers,
who propose using new dietary guidelines based on fructose to gauge how healthy foods are.
One of the reasons people on low-carbohydrate diets may lose weight is that they reduce
their intake of fructose, a type of sugar that can be made into body fat quickly,
according to a researcher at UT Southwestern Medical Center. “Our study shows for the
first time the surprising speed with which humans make body fat from fructose,” Dr.
Parks said. Fructose, glucose and sucrose, which is a mixture of fructose and glucose, are
all forms of sugar but are metabolized differently.For the study, six healthy individuals
performed three different tests in which they had to consume a fruit drink formulation. In
one test, the breakfast drink was 100 percent glucose, similar to the liquid doctors give
patients to test for diabetes — the oral glucose tolerance test. In the second test,
they drank half glucose and half fructose, and in the third, they drank 25 percent glucose
and 75 percent fructose. The tests were random and blinded, and the subjects ate a regular
lunch about four hours later. The researchers found that lipogenesis, the process by which
sugars are turned into body fat, increased significantly when as little as half the
glucose was replaced with fructose. Fructose given at breakfast also changed the way the
body handled the food eaten at lunch. After fructose consumption, the liver increased the
storage of lunch fats that might have been used for other purposes. “The message from
this study is powerful because body fat synthesis was measured immediately after the sweet
drinks were consumed,” Dr. Parks said. “The carbohydrates came into the body as
sugars, the liver took the molecules apart like tinker toys, and put them back together to
build fats. All this happened within four hours after the fructose drink. As a result,
when the next meal was eaten, the lunch fat was more likely to be stored than burned.
Dietary Sugars Stimulate Fatty Acid
Synthesis in Adults
The data demonstrate that an early stimulation of lipogenesis after fructose, consumed in
a mixture of sugars, augments subsequent postprandial lipemia. The postlunch blood TG
elevation was only partially due to carry-over from the morning. Acute intake of fructose
stimulates lipogenesis and may create a metabolic milieu that enhances subsequent
esterification of fatty acids flowing to the liver to elevate TG synthesis postprandially.
How safe is fructose for persons
with or without diabetes?
Fructose causes metabolic syndrome because of its unique metabolism that results in
intracellular ATP depletion, uric acid generation, endothelial dysfunction, oxidative
stress, and lipogenesis. An understanding of the mechanisms clarifies the variability of
responses reported in the literature. Rodent studies are often criticized, because they
typically use large supraphysiological doses (60%). However, rodents are resistant to
fructose because they synthesize vitamin C, have low uric acid concentrations, and have
good endothelial function. If uric acid concentrations are raised or if low doses are
prolonged , then insulin resistance is readily induced. The variability in human studies
can also be explained by a clarification of fructose metabolism. For example, fructose
uniquely up-regulates its own transporter (Glut5) and metabolism (fructokinase) and,
thereby, the more fructose one eats, the more sensitive one becomes to its effects. This
is a potential explanation for the fact that obese persons appear to be more sensitive to
the lipogenic effects of acute fructose ingestion than are nonobese persons.
Center for Science comments on high
fructose corn syrup
Dr. Drewnowski is not quite right when he says the Center for Science in the Public
Interest has "come out in favor" of high fructose corn syrup. We've merely
acknowledged that it is likely no worse or no better than cane sugar. We've also filed
complaints and lawsuits against companies who claim (falsely) that high fructose corn
syrup is "all natural." And, we say repeatedly, that Americans should cut back
their consumption of all added sugars, regardless of whether it comes from HFCS or cane or
beet sugar.
The bottom line is that Americans are consuming large amounts of highly processed foods
and sweetened beverages, which contain HFCS. These types of foods and beverages are
generally high in calories and fat, but low in nutrients. It is well-known that increased
consumption of foods high in fat and calories leads to weight gain, regardless of the HFCS
content.
The evil in carbs lies in the sugar
not the starch
On a chemical level, fructose appears "unique" in its ability to trigger spikes
in uric acid in the body, Johnson said. High levels of the acid hamper insulin, the
hormone that helps the body use and store sugar.
