The risk of type 2 diabetes is significantly increased if white rice is eaten regularly, claims a study
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.
Because brown rice consumption was low in the study population, the
researchers could not determine whether brown rice intake at much higher
levels was associated with a further reduction in diabetes risk.
Substitution of other whole grains for white rice was more strongly
associated with lowering diabetes risk. This observation, said the
researchers, may result from more reliable estimates based on
participants' higher consumption of whole grains other than brown rice.
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.
Comment: Consume more of brown rice e.g Ofada rice the health benefit is higher and more richer than rice important from Asia with low nutrient and quality as a recent of years of storage e.g 15 years