Nancy's Nutrition Corner
"Let food be thy medicine and medicine be thy food," Hippocrates.
Winter Squash
With holiday goodies laid out everywhere you go, nutrition may not be foremost
on your mind this time of year. But let's take a few minutes to think about
feeding our bodies well, even over the holidays. Luckily, winter squash is in
season. It IS a most wonderful time of year! Winter squash is a nutrient dense
food with many health benefits. In this short article, I'll focus on its
protective effect against cancer.
Beta-carotene. One of the most abundant nutrients in winter squash is
beta-carotene. Beta carotene has the ability to scavenge free radicals and
inhibit oxidative damage. For this reason, beta-carotene and other carotenoids
are thought to be protective against several diseases including cancer.
Epidemiological studies have confirmed that people with high intakes of fruits
and veggies rich in carotenoids have lower incidences of cancer.
Vitamin C. The association between vitamin C intake and a protective effect
against cancer is especially strong with cancers of the oral cavity, pharynx,
esophagus and stomach. The possible mechanisms of ascorbic acid's action
against cancer development include a role in immune-competence, an ability to
act as a free radical scavenger, and an ability to block carcinogenic
processes.
Phytonutrients. Winter squash is a source of the phytochemical
beta-cryptoxanthin. Studies have demonstrated that beta-cryptoxanthin can
reduce the risk of lung cancer. Researchers believe that this is due to the
antioxidant effect of beta-cryptoxanthin and also to expression of a gene that
protects cells from becoming cancerous.
Let's Not Forget Fiber. As I have mentioned in previous articles—fiber
increases fecal bulk and shortens fecal transit time thereby decreasing the
time in which carcinogens have contact with the colon. In addition, insoluble
fibers actually bind carcinogens and move them out of the body.
There you have it: four good reasons to pick up some winter squash! There are
some beautiful varieties available this time of year, and a slice of baked
squash makes a perfect side dish or quick snack.
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Nancy Silva, ND is a licensed naturopath with a penchant for good food. Her monthly column discusses the
nutritional aspects of some of the foods available through LocalHarvest. You can contact Nancy from
her listing on our website.
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Back to the December 2008 Newsletter
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