Witte rijst en diabetes*
Het regelmatig eten van witte rijst doet de kans op
diabetes type-2 duidelijk verhogen volgens een Amerikaanse studie. In de studie werd een analyse gemaakt van verschillende studies onder ruim 350.000 deelnemers, allen vrij van diabetes, zowel wonend in China, Japan, USA als Australië, die 4 tot 22 jaar gevolgd werden. De kans op diabetes was vooral hoger bij de
Chinezen en Japanners, die van nature al meer rijst eten. Bij hen met de hoogste inname bleek de kans wel 55% hoger te zijn dan bij hen met de laagste inname. Bij de “Westerse” mensen bleek dit ruim 10% te zijn. Witte rijst heeft volgens de onderzoekers een vrij hoge
glycemische belasting en dat geeft de verhoogde kans op diabetes
type-2, terwijl bruine rijst met meer
vezels, vitamines en mineralen een lagere glycemische belasting heeft.
White Rice Increases Risk of Type 2 Diabetes, Study Claims
The risk of type 2 diabetes is significantly increased if white rice is eaten regularly, claims a study published today on bmj.com.
The authors from the Harvard School of Public Health look at previous studies and evidence of the association between eating white rice and the risk of type 2 diabetes. Their study seeks to determine whether this risk is dependent on the amount of rice consumed and if the association is stronger for the Asian population, who tend to eat more white rice than the Western world.
The authors analysed the results of four studies: two in Asian countries (China and Japan) and two in Western countries (USA and Australia). All participants were diabetes free at study baseline.
White rice is the predominant type of rice eaten worldwide and has high GI values. High GI diets are associated with an increased risk of developing type 2 diabetes. The average amount of rice eaten varies widely between Western and Asian countries, with the Chinese population eating an average of four portions a day while those in the Western world eat less than five portions a week.
A significant trend was found in both Asian and Western countries with a stronger association found amongst women than men. The results also show that the more white rice eaten, the higher the risk of type 2 diabetes: the authors estimate that the risk of type 2 diabetes is increased by 10% with each increased serving of white rice (assuming 158g per serving).
White rice has a lower content of nutrients than brown rice including fibre, magnesium and vitamins, some of which are associated with a lower risk of type 2 diabetes. The authors report, therefore, that a high consumption of white rice may lead to increased risk because of the low intake of these nutrients.
In conclusion, the authors state that "higher white rice intake is associated with a significantly elevated risk of type 2 diabetes." This applies for both Asian and Western cultures, although due to findings suggesting that the more rice eaten the higher the risk, it is thought that Asian countries are at a higher risk. The authors recommend eating whole grains instead of refined carbohydrates such as white rice, which they hope will help slow down the global diabetes epidemic.
In an accompanying editorial, Dr Bruce Neal from the University of Sydney suggests that more, bigger studies are needed to substantiate the research hypothesis that white rice increases the chances of getting type 2 diabetes.
De volledige studie. (Mei 2012)
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