A
diet rich in omega-3 fatty acids, dietary fibre, beta-carotene and
vitamin E appear to offer significant protection against non-Hodgkin
lymphoma, says a Swedish-Danish-American study. The researchers behind
the new study, led by Ellen Chang from the Northern California Cancer
Center, looked at the dietary intakes of 591 people with non-Hodgkin
lymphomas (NHL) and certain lymphoma subtypes, and 460 healthy controls
recruited from seven Swedish counties. ?Overall, we found that eating
fish and marine fats was associated with lower risk of overall
non-Hodgkin lymphomas and certain lymphoma subtypes (which should be
examined separately, since NHLs represent a group of several different
lymphomas),? Dr. Chang told NutraIngredients.com. ?We also found that
consuming certain antioxidant vitamins, commonly found in some fruits
and vegetables, was associated with lower risk of overall NHL and some
common subtypes.? The participants were recruited between 2000 and 2002,
and dietary assessments were performed using a validated,
semi-quantitative 137-item (including supplements) food frequency
questionnaire (FFQ). The researchers assumed that recent dietary habits
had not changed significantly since the distant past. After adjusting
the results to eliminate potential confounding factors like gender and
BMI, Chang and her colleagues report that, while dietary intake of most
macronutrients was not associated with NHL risk, average consumption of
about 0.8 grams per day (0.4 grams per 1,000 kcal) of omega-3 or marine
fatty acids was associated with a 20 and 60 per cent reduced risk of NHL
and its subtypes, compared to those who consumed about 0.2 grams per
day. This also extended to fish oil supplements, with people who
supplemented their diet with fish oil at a significantly reduced risk of
NHL and its subtypes than people who did not take the supplements (risk
reduction of between 30 and 50 per cent). Strong associations between
dietary fibre intake and NHL risk reductions were also observed, said
the researchers in the American Journal of Epidemiology. Indeed, Daily
average intake of 14.4 grams per 1,000 kcal was linked to a 50 to 60 per
cent risk reduction of NHL and all its subtypes. Dietary consumption of
the micronutrients beta-carotene or alpha-tocopherol was also
associated with lower NHL risk, said the researchers, with the highest
dietary beta-carotene intake (average 4.4 micrograms per day) associated
with 40 per cent reduction in NHL risk, compared to the lowest intake
(average 1.2 micrograms per day). Similarly, the highest dietary
alpha-tocopherol intake (average 9.8 milligrams per day) associated with
60 per cent reduction in NHL risk, compared to the lowest intake
(average 5.0 milligrams per day).
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Source: NutraIngredients