potatoes may increase the risk of type 2 diabetes and replacing them with whole
grains may reduce this risk, says a new study published in Diabetes Care.
The study shows
that when potatoes
are served hot, their starch becomes more easily digestible and increases blood glucose levels more quickly.
‘Potatoes may be appetizing but restrict excessive consumption as it increases the risk of Type - 2 diabetes. Instead switch to whole grains to reduce potato cravings.
According to the
latest statistics available from the World Health Organization (WHO), about 9%
of adults had diabetes in 2014. Diabetes was the primary cause of 1.5 million
deaths in 2012. More than 80% of diabetes deaths take place in developing
Type 2 diabetes
comprises 90% of individuals with
diabetes around the world. Obesity
and physical inactivity are linked to risk factors for type 2 diabetes. The body's ineffective use of insulin
results in type 2 diabetes.
food consumption should be reduced for people with elevated risk of developing
diabetes or insulin resistance. Healthy foods such as vegetables,
fruits, whole grains, and nuts, rather than potatoes, should be encouraged for the prevention of type 2 diabetes
," said first author Isao Muraki, MD, PhD, of the Osaka Center for Cancer and Cardiovascular Disease Prevention, Japan, and Harvard TH Chan School of Public Health, Boston,
analyzed data from three US studies on 70,773 women from the Nurses' Health
Study conducted between 1984 and 2010, a total of 87,739 women from the Nurses'
Health Study II (1991-2011), and as many as 40,669 men from the Health
Professionals Follow-Up Study (1986-2010).
not have cancer, cardiovascular disease, or diabetes at the beginning of the
study. Researchers examined potato consumption using validated food frequency
questionnaires. They also observed the 4-year change in potato consumption.
They spotted type 2 diabetes using self-report and confirmed it with a
results showed that individuals with a higher consumption of potatoes - baked,
boiled, mashed, or french fried - had a greater risk of type 2 diabetes.
Persons who had
less than two to four servings of potatoes per week had a 7% increased risk of
type 2 diabetes. Also, participants who ate seven or more servings per week had
33% increased risk compared to those who consume less than one serving per
consumed french fries had a higher risk of type 2 diabetes than those who had
mashed, baked or boiled potatoes.
improved their potato consumption over time - particularly french fries - had an increased risk of diabetes
. For every three portions per week increase, they had a 4% increased risk of diabetes compared with those who ate the same amounts of potatoes over time.
showed that replacing three servings per week of potatoes - regardless of type - with whole grains would decrease the risk of type 2 diabetes by 12%.
Whether to hold
potatoes as a vegetable in dietary recommendations has recently been a point of
contention in the United States and the United Kingdom, with the two countries
coming to contradictory conclusions.
current nutrition guide issued by the United States Department of Agriculture,
recognize potatoes to be a "healthful vegetable."
In contrast, the
UK national food guide, the Eatwell plate, lists potatoes as a cereal,
according to background information in the article.
potatoes are considered a vegetable in the US Guideline of Healthy Eating,
potatoes should not be regarded as an essential component of a healthful diet.
These data support the notion that potatoes should be considered a source of
carbohydrates like grains, especially refined grains, rather than
vegetables," said Muraki.
contain a large amount of starch and a relatively small amount of fiber, vitamins, minerals
, and polyphenols. Lower quality and quantity of carbohydrate is associated with a higher risk of type 2
diabetes," he added.
acknowledge that these results may not extend to other ethnic and demographic
groups because study participants were healthcare professionals of European
1. Isao Muraki,
Eric B. Rimm, Walter C. Willett, JoAnn E. Manson, Frank B. Hu and Qi Sun
before print December 17, 2015, doi: 10.2337/dc15-0547