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Red wine is more than one of life's big pleasures. It's a bona fide heart healthy, cancer-fighting, anti-aging super-drink. Or is it poison?
A new University of Washington (UW) study found arsenic in American red wines. They tested 65 popular, inexpensive wines from California, Washington, New York, and Oregon. The results showed all but one had arsenic levels exceeding the Environmental Protection Agency's limits on arsenic in drinking water.[i]
This report follows a 2008 study from Kingston University in London finding that many wines throughout the world contain heavy metals up to 200 times the amount considered safe.[ii]
And some California residents have brought suit against 28 California wineries including Franzia, Mogen David, and Almaden for selling products that contain a "dangerous" level of arsenic. The lawsuit claims some of the wines tested 500% higher than what's considered safe.
Arsenic is a naturally occurring element. It leaches out of rocks into soil and water and makes its way into the food chain. In some forms, arsenic is toxic to humans. Long-term exposure is linked with cardiovascular disease, diabetes, and cancers of the liver, lung, kidney, skin and bladder.[iii]
The EPA allows drinking water to contain no more than 10 parts per billion (ppb) of arsenic. The wine samples in the UW study ranged from 10 to 76 ppb, with an average of 24 ppb.
Washington reds had the highest average arsenic levels at 28 ppb and Oregon had the lowest with 13 ppb.
On average, American wines were higher in arsenic than European wines. That may be due to the geology of U.S. wine growing regions.
And levels may rise when a vineyard is planted on land previously dedicated to other crops like orchards which used arsenic-based pesticides. The UW researchers found some evidence that higher levels of arsenic in Washington red wines could be a result of pesticide residue.
And it's not just wine. Recently the FDA tested 65 brands of beer. Ten of them contained two to three times more arsenic than the federal limits for safe drinking water.
Is it time to switch to gin?
Not yet. Although the study found arsenic in red wine at levels higher than recommended for water, no one – not even the EPA - says the arsenic levels in red wine are dangerous.
For one thing, people don't drink the same volume of wine as they do water (with perhaps the exception of Gerard Depardieu who admits to drinking 14 bottles of wine a day.) The study points out that the average adult drinks far more water (between 1.7 and 3.2 cups per day) than frequent wine drinkers (roughly a half cup per day on average). So while the concentration may be higher, that doesn't mean you're getting too much.
In fact, no one really knows how much arsenic is too much. But we do know it's just about everywhere. Arsenic has been found in apple juice, milk, bottled water, cereal bars, infant formula, salmon, tuna, broth (beef and chicken), seaweed, and many other foods.
Consumer Reports tested 223 samples of rice and rice products such as cereals, baby foods, rice cakes and rice milk, taken from the shelves of grocery stores in the New York metropolitan area or bought online. Every single product they tested - even organic rice - contained arsenic.[iv]
In a companion study, the author of the UW report calculated how much of an arsenic "dose" an average child or adult would get from such food sources and how close it would come to risk thresholds set by the U.S. Agency for Toxic Substances and Disease Registry for total arsenic consumption across a person's diet.
For an adult who frequently drinks wine, the arsenic consumed from that single source would only make up 10 to 12 percent of the total maximum recommended daily arsenic intake. But if that person also eats large quantities of contaminated rice, tuna or energy bars, for instance, that could push arsenic consumption beyond safe levels.
A person who eats an average or large amount of contaminated rice could get between 41% and 101% of the maximum recommended daily dose of arsenic from that one source alone, the study found. Brown rice is worse. It contains more arsenic than refined white rice because arsenic concentrates in the bran or outer shell of the rice. That bran is removed to make white rice but remains intact for brown rice.
The food that posed the largest risk of arsenic poisoning was infant formula made with organic brown rice syrup. The report estimated some infants eating large amounts of certain formulas may be getting more than 10 times the daily maximum dose of arsenic.
And a study by Consumer Reports found that people who ate just one rice food item a day had 44% higher arsenic blood levels than people who ate none. And people eating two or more rice products had 70% higher levels of arsenic.
What should a red wine lover do? Rather than sue your favorite vintner, it's better to look at your diet as a whole.
If you eat a lot of brown rice, use brown rice syrup, and drink rice milk you might want to cut back. A study by Consumer Reports found brown rice may be contaminated with "worrisome" levels of arsenic.[v] And when Scottish researchers tested rice milk from supermarket shelves they found that 80% of it exceeded the EPA's safe drinking water level of 10 ppb.[vi]
And one study in India showed that eating high-arsenic rice can lead to the type of genetic damage in cells that's associated with cancer.[vii] Long-term exposure to arsenic has already been linked to skin cancer, bladder cancer, lung cancer, and heart disease.
Until we know more about how much arsenic is too much, there are some things you can do to reduce your exposure.
1. Limit rice in your diet. Enjoy brown rice only occasionally. And try the Lundberg brand of rice grown in California where arsenic levels are lower than other rice-growing areas in the U.S. Their California White Basmati Rice has only 1.3 to 1.6 ppb arsenic per serving.
2. Cook your rice like pasta. Cook one cup of rice in six cups of water and pour off the remaining water when the rice is done. This has been shown to reduce arsenic content by about 30%.
3. Eat more turmeric. Arsenic induces oxidative stress that leads to DNA damage and may lead to cancer. One Indian study of people chronically exposed to arsenic showed that curcumin, a powerful antioxidant and the active ingredient in the spice turmeric, helped repair DNA damage caused by arsenic.[viii]
4. Take folic acid. A recent study in the Journal of Clinical Nutrition found that taking folic acid supplements helped reduce blood levels of arsenic by more than 13%.[ix]
5. Cleanse with chlorella. Chlorella is a green algae that's loaded with chlorophyll. It helps absorb heavy metals. Start with one gram with each meal and build up to three grams.
6. Detox with modified citrus pectin. Your body can process and expel a certain amount of arsenic and other heavy metals on its own. But to help it out, you may want to consider a gentle detox using fruit pectin.
Pectin is a thickening or gelling agent derived from fruits like apples and oranges. In the digestive tract, it's been proven to bind with heavy metals, prevent them from being absorbed and drag them safely out of the body.
Just one day of supplementing with pectin from citrus fruit peels was shown in one California study to increase arsenic detoxification by 130%.[x]
[i] Denise Wilson. "Arsenic Content in American Wine." Journal of Environmental Health, October 2015, Volume 78, No. 3
[ii] Naughton, Declan P. and Petroczi, Andrea. "Heavy metal ions in wines: meta-analysis of target hazard quotients reveal health risks." Chemistry Central Journal. 30 October 2008. Accessed 19 October 2015. http://journal.chemistrycentral.com/content/2/1/22
[iii] A H Smith, C Hopenhayn-Rich, M N Bates, H M Goeden, I Hertz-Picciotto, H M Duggan, R Wood, M J Kosnett, and M T Smith. "Cancer risks from arsenic in drinking water." Environ Health Perspect v.97; Jul 1992
[iv] "Arsenic in your food: Our findings show a real need for federal standards for this toxin." Consumer Reports magazine: November 2012
[vi] Meharg AA, Deacon C, Campbell RC, Carey AM, Williams PN, Feldmann J, Raab A. "Inorganic arsenic levels in rice milk exceed EU and US drinking water standards." J Environ Monit. 2008 Apr;10(4):428-31
[vii] Mayukh Banerjee et al, "High arsenic in rice is associated with elevated genotoxic effects in humans." Scientific Reports Jul 22, 2013
[viii] Madhumita Roy, Dona Sinha, Sutapa Mukherjee, Jaydip Biswas. "Curcumin prevents DNA damage and enhances the repair potential in a chronically arsenic-exposed human population in West Bengal, India." Eur J Cancer Prev. 2011 Mar;20(2):123-31. PMID: 21332098
[ix] Mary V Gamble, Xinhua Liu, Vesna Slavkovich, J Richard Pilsner, Vesna Ilievski, Pam Factor-Litvak, Diane Levy, Shafiul Alam, Mominul Islam, Faruque Parvez, Habibul Ahsan, Joseph H Graziano. "Folic acid supplementation lowers blood arsenic." Am J Clin Nutr. 2007 Oct;86(4):1202-9. PMID: 17921403
[x] Isaac Eliaz, Arland T Hotchkiss, Marshall L Fishman, Dorena Rode. "The effect of modified citrus pectin on urinary excretion of toxic elements." Eur J Pharmacol. 2008 Sep 4;591(1-3):7-12. PMID: 16835878