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EarthTalk: Too many vitamins

Published 12:27 pm, Saturday, August 30, 2014
  • According to a report by the Environmental Working Group (EWG), nearly half of American kids 8 and under consume potentially harmful amounts of vitamin A, zinc and niacin because of excessive food fortification. EWG's report focused on two frequently fortified food categories: breakfast cereals and snack bars. Photo: Contributed Photo, Contributed / New Canaan News Contributed
    According to a report by the Environmental Working Group (EWG), nearly half of American kids 8 and under consume potentially harmful amounts of vitamin A, zinc and niacin because of excessive food fortification. EWG's report focused on two frequently fortified food categories: breakfast cereals and snack bars. Photo: Contributed Photo, Contributed

 

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Dear EarthTalk: Is it true that much of our food -- including cereals and snacks eaten by children -- is actually overfortified with excessive amounts of vitamins and minerals that can be dangerous to our health? -- Diane Summerton, Waukesha, Wisc.

Added nutrients in the processed foods we eat could indeed be too much of a good thing, especially for kids. According to a report from nonprofit health research and advocacy group Environmental Working Group, nearly half of American children ages 8 and under "consume potentially harmful amounts of vitamin A, zinc and niacin because of excessive food fortification, outdated nutritional labeling rules and misleading marketing tactics used by food manufacturers."

EWG's analysis for the "How Much Is Too Much?" report focused on two frequently fortified food categories: breakfast cereals and snack bars.

Of the 1,550 common cereals studied by EWG, 114 (including Total Raisin Bran, Wheaties Fuel, Cocoa Krispies, Krave and others) were fortified with 30 percent or more of the adult Daily Value for vitamin A, zinc and/or niacin. And 27 of 1,000 brands of snack bars studied (including Balance, Kind and Marathon bars) were fortified with 50 percent or more of the adult Daily Value for at least one of these nutrients. EWG researchers based their analysis on Nutrition Facts labels on the various food items' packaging.

"Heavily fortified foods may sound like a good thing, but it when it comes to children and pregnant women, excessive exposure to high nutrient levels could actually cause short- or long-term health problems," said EWG research director Renee Sharp, who co-authored the report. "Manufacturers use vitamin and mineral fortification to sell their products, adding amounts in excess of what people need and more than might be prudent for young children to consume."

Sharp added that excessive levels of vitamin A can lead to skeletal abnormalities, liver damage and hair loss, while high doses of zinc can impede copper absorption, compromise red and white blood cells and impair immune function. Also, too much vitamin A during pregnancy can lead to fetal developmental issues. And older adults who get too much vitamin A are at more risk for osteoporosis and hip fractures.

EWG suggests it's time to overhaul our food labeling system to better account for how ingredients may affect children as well as adults. EWG is working on the U.S. Food and Drug Administration to update its guidelines for Nutrition Facts to better reflect how foods affect children as well as adults. In the meantime, parents might want to consider scaling back on fortified foods for their kids in favor of so-called whole foods (unprocessed, unrefined fruits, vegetables and whole grains) that deliver the right amounts of nutrients naturally.

EarthTalk is by Roddy Scheer and Doug Moss of E -- The Environmental Magazine (www.emagazine.com). Send questions to earthtalk@emagazine.com.