Good news for mushroom lovers. A team of researchers has tried to clear the air around burgundy or summer truffles, a type of mushroom that ranges among the most expensive foods in the world, being contaminated by radioactivity.
In a new study, experts suggest that truffles which are found mostly in central Europe are safe to eat
and these may contain only negligible amounts of radioactive compounds. The safety of truffles became questionable after the 1986 Chernobyl nuclear disaster in Ukraine that released substantial quantities of radioactive particles, especially caesium-137 (137Cs). Transported by winds and deposited by heavy rainfall, the caesium polluted large swathes of the European continent.
“Much of the continent's topsoil layers are still radioactively contaminated,” says Ulf Büntgen, head of the dendroecology group at the Swiss Federal Research Institute (WSL) and lead author of the study.
However, that does not seem to have affected the subterranean Burgundy or summer truffles (Tuber aestivum) which are highly prized as a delicacy for their hazel-nutty flavour and intense aroma. “We were very positively surprised that all specimens we analysed exhibited insignificant values of 137Cs,” said Büntgen in a paper published in Biogeosciences, an open access journal of the European Geosciences Union (EGU).
Some experts find this result surprising because many types of fungi, including truffles, grow underground and draw nutrients from soil prone to accumulating radioactive pollution. Deer truffles, for example, a type of 'false' truffles (not of the tuber genus) more appealing to deer or wild boar than to humans, range among the most contaminated fungi.
The team says that in regions where the radioactive fallout after Chernobyl was most intense, not only mushrooms but also higher components in the food chain, including game meat of red deer and wild boar, still have excess values of 137Cs. The researchers analysed 82 Burgundy truffles collected across Europe between 2010 and 2014. The samples were harvested by trained truffle dogs in several natural habitats and plantations in Switzerland, Germany, France, Italy and Hungary.
All samples had negligible radioactivity, with 137Cs values ranging below the detection limit of two becquerels per kg. This is far below the tolerance value of 600 becquerels per kg, meaning the truffles are safe for consumption, at least in the areas the researchers sampled from.
Friday, 26 February 2016
Adding Omega-3 Fatty Acids to Your Diet May Cut Breast Cancer Risk
A new study reveals that foods rich in Omega-3 fatty acids are likely to reduce the risk of breast cancer in women who are obese and in post-menopausal phase.
The study shows that increasing levels of Omega-3 in the blood were linked with reduced breast density. However, the association was found only in women with a body mass index above 29, bordering on obesity.
Omega-3 fatty acids are naturally found in fatty fish, such as tuna, seafood and some nuts and seeds.The anti-inflammatory effects found in Omega-3s, specifically Docosahexaenoic acid (DHA), a type of fatty acid, are preferentially protective in obese post-menopausal women.
Further, women with a normal weight have less inflammation than heavier women, and are therefore less likely to benefit from anti-inflammatory Omega-3. "Omega-3 fatty acids have an anti-inflammatory effect, so that's one of the reasons why we suspected it may be particularly effective in obese women," said Andrea Manni, professor at Pennsylvania State University in US.
The other thing which was noted was that obesity is a major breast cancer risk factor in post-menopausal women, and scientists believe that increased inflammation is an important underlying cause in this population. The study which has been published in the journal Cancer Prevention Research, included 266 healthy post-menopausal women with high breast density detected by routine mammograms.
These women either received no treatment, or were given Raloxifene, an antiestrogen drug, or Lovaza, an omega-3 drug, or a combination of the two drugs. In conclusion, the study pointed out that although Lovaza contains both the fatty acids DHA and eicosapentaenoic acid (EPA), only DHA blood levels were associated with breast density reduction.
Thursday, 25 February 2016
Everyday Mindfulness May Help Keep Glucose Levels Healthy
Those who score high on mindfulness - the ability of being aware of one's present thoughts and feelings - are significantly more likely than people with low scores to have healthy glucose levels, suggests new research. We all know that elevated glucose levels may increase risk of Type-2 diabetes. The researchers also sought to identify factors that might explain the connection they saw between higher mindfulness and healthier glucose levels.
Their analysis of the data showed that obesity risk (mindful people are less likely to be obese) and sense of control (mindful people are more likely to believe they can change many of the important things in their life) both contribute to the link.
"This study demonstrated a significant association of dispositional mindfulness with glucose regulation, and provided novel evidence that obesity and sense of control may serve as potential mediators of this association," said the study led by Eric Loucks, assistant professor at Brown University School of Public Health in Rhode Island, US.
"As mindfulness is likely a modifiable trait, this study provides preliminary evidence for a fairly novel and modifiable potential determinant of diabetes risk," Loucks noted.
The study was published in the American Journal of Health Behavior.
The researchers measured health indicators including dispositional mindfulness and blood glucose in almost 400 people. The study used the Mindful Attention Awareness Scale (MAAS), a 15-item questionnaire to assess dispositional mindfulness on a 1 to 7 scale.
The researchers found that people with high MAAS scores of six or seven were 35 percent more likely to have healthy glucose levels under 100 milligrams per decilitre than people with low MAAS scores below four.
Participants with high levels of mindfulness were about 20 percent less likely to have Type-2 diabetes, but the total number of people in the study with the condition may have been too small to allow for definitive findings, Loucks said.