Rice is known to accumulate around ten times as much arsenic as other cereals. In rice grains , arsenic is concentrated in the outer bran layer surrounding the endosperm. This means that brown rice, (unmilled or unpolished rice that retains its bran) contains more arsenic than white rice. This milling process removes arsenic from white rice but also removes 75-90% of its nutrients.
Previous research from the University of Sheffield found half of the rice consumed in the UK exceeded European Commission regulations for levels of arsenic in rice meant for the consumption of infants or young children (see the News below).
The new study:This new study tested different ways to cook rice to try and reduce the arsenic content and the team from the Institute for Sustainable Food found that by using a home-friendly way of cooking rice, the ‘parboiling with absorption method’ (PBA), most of the arsenic was removed, while keeping most nutrients in the cooked rice.
The PBA method involves parboiling the rice in pre-boiled water for five minutes before draining and refreshing the water, then cooking it on a lower heat to absorb all the water.
Our aim was to optimise the method to remove arsenic while keeping maximum nutrients in the cooked rice. Our newly developed method, PBA, is easy and home-friendly so that everyone can use it. We don't know the amount of arsenic in each packet rice we buy; even though brown rice is nutritionally superior to white rice as our data shows, it contains more arsenic than white rice. With our new method we are able to significantly reduce the arsenic exposure while reducing the loss of key nutrients.
