Some infant rice cereals contain elevated methylmercury levels, study finds
26 Oct 2017 --- Eating large amounts of certain fish can expose consumers to methylmercury, which can potentially cause health problems. But recent research has shown that rice grown in polluted conditions can also have raised levels. A study appearing in the Americal Chemical Society’s (ACS) Journal of Agricultural and Food Chemistry reports that some types of infant rice cereal could also contain amounts of methylmercury that could potentially pose a health risk. For years, elevated methylmercury levels in certain fish such as albacore tuna have led some people, particularly pregnant women, to limit their consumption of these species to reduce their potential exposure, the ACS press release notes. Methylmercury is a form of mercury that, in high enough amounts, can cause neurological and reproductive problems in adults, and developmental issues in infants and young children. Within the past ten years, rice has emerged as another potential source of mercury exposure. Studies have detected methylmercury in the grain when it is grown in polluted areas, potentially posing a health risk to people who rely on the crop as a daily staple. Given these results, Yong Cai and colleagues wanted to find out whether commercial rice cereals for infants also contain the substance. Likely source of mercury Based on their results, the researchers estimated that infants who consume these products could ingest between 0.004 to 0.123 micrograms of methylmercury per kilogram of body weight daily. The potential health effects of this amount of mercury are hard to pin down. The US Environmental Protection Agency has set a 0.1 microgram/kg/day reference daily dose (RfD) for methylmercury. However, the standard was calculated using factors that might not be relevant to baby cereal, the researchers say. For example, the RfD is based on a pregnant woman's intake of mercury and its transfer to the fetus. The researchers conclude that more studies are needed to more precisely understand how mercury in food might affect infants. To contact our editorial team please email us at editorial@cnsmedia.com
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