Consuming grapefruit appears to increase risk of breast cancer in post-menopausal women, according to a study in British Journal of Cancer (July, 2007) (Prospective study of grapefruit intake and risk of breast cancer in postmenopausal women: the Multiethnic Cohort Study)

One quarter grapefruit per day compared to none increased risk by about one third. The significance of this slightly increased risk is underscored by 2 factors — women are taught lifelong to associate grapefruit intake with health and with weight-control (the “Grapefruit diet”).

The factor involved in the increased risk is a chemical in grapefruit (CYP3A4) that blocks the body’s breakdown of estrogen.

Since vitamin C and other antioxidants found in grapefruit are readily available from other fruits, with this new information women can choose to switch to oranges, tangerines, lemon juice, and other fruits and avoid grapefruit.

Swedish researchers report “an inverse association between moderate alcohol intake and risk of renal cell cancer. Consumption of red wine, white wine, and strong beer was associated with a lower risk. ”

But, they add, “there were no clear associations with light and medium beer, strong wine, or hard liquor, perhaps due to chance or differences in other risk factors related to specific types of alcoholic drink. For example, the large variation in other risk factors such as smoking and occupation could explain why hard liquor was not associated with renal cell cancer risk although we controlled for known risk factors.”

The study appears in July issue of British Journal of Cancer. Other recent studies have found that red wine intake reduces risk of prostate cancer in men.

Drinking one or more cups of coffee per day has been found to lower the risk of death from liver cancer in a study in Japan including men and women with hepatitis C and a history of smoking and alcohol use.

Lately, claims of health benefits from consumption of Asian green tea have brought about a virtual revolution in the tea aisles of US supermarkets. Wal-Mart sells numerous brands of green tea plus white and red teas and various flavors of black tea.

So it is interesting to see that in Japan recent studies have suggested a lower risk of liver cancer in coffee-drinkers.

Unless these studies are tied in with some public relations conspiracy to prepare the Japanese population for coffee-house chains (seriously, no evidence of that) they may have a message for Westerners: don’t throw out the coffee pot when you add green tea to your day.

Aspartame, sold under the brand names NutraSweet and Equal and found in popular products like Diet Coke, Diet Pepsi, Diet Snapple and Sugar Free Kool-Aid, has been under pressure for the past two years from evidence that it might cause leukemia, lymphoma and breast cancer in rats. Reuters reports today that the FDA is “unmoved” by this evidence, which comes from Italy.

We have some recipes for canned pink wild Alaskan salmon for people who, like many of us, live on limited budgets. Hughie Kearnley, a chef who is fighting prostate cancer, shares his recipes for wild Alaskan salmon both canned and fresh.

January 16, 2007 Tomatoes and broccoli — two vegetables known for their cancer-fighting qualities — are better at shrinking prostate tumors when both are part of the daily diet than when they’re eaten alone, according to a new study from University of Illinois and University of Ohio.

“When tomatoes and broccoli are eaten together, we see an additive effect,” said University of Illinois food science and human nutrition professor John Erdman. “We think it’s because different bioactive compounds in each food work on different anti-cancer pathways.”

Researchers have found that men who drink an average of four to seven glasses of red wine per week are only half as likely (52% ) to be diagnosed with prostate cancer as those who do not drink red wine. In addition, red wine appears particularly protective against advanced or aggressive cancers.

Why red wine? Scientists are focusing on plant chemicals — especially resveratrol — found in wine, in grapes and in several other fruits. Resveratrol appears to normalize certain cancer-stimulating processes in cells, upregulate vitamin D3 and counterbalance androgens, the male hormones that stimulate the prostate.

Flax is a contentious issue among prostate cancer researchers. Dr. Dean Ornish on WebMed cites Dr. Charles “Snuffy” Myers’ view of flaxseed oil as virtual fuel for prostate cancer tumors. Recommending omega-3 fatty acids in fish, Ornish notes some “disturbing research published by Dr. Charles ‘Snuffy’ Myers at the University of Virginia Medical School in Charlottesville. He has evidence indicating that flax seed oil may promote the growth of prostate tumors. In someone with prostate cancer, I would avoid flax seed oil and instead take 2-3 grams per day of fish oil.”

Yet Wendy Demark-Wahnefried, Ph.D., a researcher in Duke’s School of Nursing, continues to turn up evidence that flaxseed — not flax oil — inhibits growth of prostate cancer.

Researchers exploring the notion that certain nutrients might
protect against pancreatic cancer found that lean individuals who got
most of these nutrients from food were protected against developing
cancer. The study also suggests this protective effect does not hold true
if the nutrients come from vitamin supplements.

Eating foods like broccoli and soy has been linked to lower cancer rates, and California researchers say that they may have discovered what underlies this protective effect. Using cells in a lab dish, a team led by Erin Hsu, a graduate student in molecular toxicology at the University of California, Los Angeles has found that genistein, an isoflavone in soy, and diindolymethane (DIM), a compound made in the gut when broccoli is digested, reduce the production of two proteins needed for cancers to spread.