The link between salt and sugar and
cancer is not wholly proven yet but many nutritionalists have their deep
suspicions. Certainly foods packed with added salts or sugar are likely to be
heavily processes and contain more fats and carcinogens. Notwithstanding the
risk for high blood pressure and diabetes there may therefore be an indirect
link with cancer.
Refined sugars have had its, fibre, proteins, vitamins and
minerals removed so they are rapidly absorbed in the body producing a sugar
rush. The pancreas interprets this as a big meal and responds by pumping insulin
into the blood stream. Very shortly the sugar levels drop drastically leading to
hypoglycemia (low blood sugar) causing dissyness, hunger & tiredness, only
satisfied by eating more food and particularly if sugary will lead to a repeat
cycle. Overall refined sugars lead to higher insulin levels which has been shown
encourage cancer progression. They also lead to eating more and obesity which is
also harmful. On the other hand, sugars contained in natural
whole foods are absorbed slower and metabolised in a controlled pathway and do
not produce this roller coaster high & low sugar ride. Studies have also found
that sucrose cannot metabolise completely in our bodies, resulting in the
formation of metabolites, such as pyruvic acid and unstable sugars containing
five carbon atoms. These toxic by-products have been linked to lowering the
vitamin E levels and the formation of free radicals or oxidative metabolites.
There have also been anecdotal reports that sugar excess also results in sub
clinical damage to the non insulin secreting part of the pancreas. This can
impair the production of enzymes such as trypsin and chymotrysin, linked to the
weakening of the healing processes and immune attack against cancer.
Artificial sweeteners
and their their influence on cancer has been the
subject of much debate. These sugar substitutes are substances that are
used instead of sucrose (table sugar) to sweeten foods and beverages. Questions
about artificial sweeteners and cancer arose when early studies showed that a
type now not currently used called cyclamate in combination with saccharin
caused bladder cancer in laboratory animals. However, results from subsequent
carcinogenicity studies (studies that examine whether a substance can cause
cancer) on these sweeteners and other approved sweeteners have not provided
clear evidence of an association between artificial sweeteners and cancer in
people. Subsequent studies in rats showed an increased incidence of bladder
cancer at high doses of saccharin consumption, especially in male rats. However,
mechanistic studies (studies that examine how a substance works in the body)
have shown that these results apply only to rats. In human studies of patterns,
causes, and control of diseases in groups of people have shown no consistent
evidence that saccharin is associated with bladder cancer incidence.
Aspartame, distributed under several trade names (e.g.,
Nutrasweet® and Equal®), was approved in 1981 by the US
Food and Drug Association after numerous tests showed that it did not cause
cancer or other adverse effects in laboratory animals. Questions regarding the
safety of aspartame were renewed by a 1996 report suggesting that an increase in
the number of people with brain tumours between 1975 and 1992 might be
associated with the introduction and use of this sweetener in the United States.
However, analysis of current statistics showed that the overall incidence of
brain tumours began to rise in 1973, 8 years prior to the approval of aspartame,
and continued to rise until 1985. Moreover, increases in overall brain cancer
incidence occurred primarily in people age 70 and older, a group that was not
exposed to the highest doses of aspartame since its introduction. These data
suggest there is no link between the consumption of aspartame and the
development of brain tumors.
Likewise, an early laboratory experiment found more
lymphomas and leaukaemias in rats fed very high doses of aspartame (equivalent
to drinking to 2,083 cans of diet soda daily). However, there were some
inconsistencies in the findings. Subsequently, the National Cancer Institute of
the USA examined human data from the largest Dietary and Health Study involving
of over half a million retirees. Increased consumption of aspartame-containing
beverages was not associated with the development of lymphoma, leukemia, or
brain cancer.
In addition to saccharin and aspartame, there are three
other artificial sweeteners currently permitted for use in food in the United
States. Acesulfame potassium (also known as ACK, Sweet One®, and
Sunett®) was approved by the Food and Drug Administration in 1988 for
use in specific food and beverage categories, and was later approved as a
general purpose sweetener (except in meat and poultry) in 2002. Sucralose (also
known as Splenda®) was approved by the FDA as a tabletop sweetener in
1998, followed by approval as a general purpose sweetener in 1999. Neotame,
which is similar to aspartame, was approved by the FDA as a general purpose
sweetener (except in meat and poultry) in 2002. Before approving these
sweeteners, the FDA reviewed more than 100 safety studies that were conducted on
each sweetener, including studies to assess cancer risk.
The results of these studies showed no evidence that these
sweeteners cause cancer or pose any other threat to human health.
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