We recently wrote about how foods packed with good bacteria provide no benefits. Now, new research is dragging yoghurts under the spotlight because of the amount of sugar many contain. In fact, according to the research led by Leeds University in the UK, some yoghurts contain more sugar per 100g than cola. Publishing their findings in the journal BMJ Open, the team of researchers said that even organic yoghurts often contain way too much sugar. The only yoghurts, they said, that can be considered low in sugar are natural and Greek-style. For the research, the team analysed 900 different yoghurts on sale in supermarkets in the UK. Perhaps unsurprisingly, yoghurt deserts were found to contain the most sugar (an average of 16.4g per 100g). More surprising, though, are the findings relating to organic yoghurts. That’s because many people see them as a healthy option, not knowing they contain so much sugar. The UK government are trying to reduce the amount of sugar consumed by the public and yoghurts are one of the areas they want to see addressed. This new research underlines why. To be classed as ‘low sugar’ a product needs to contain no more than 5g of sugar per 100g. Just 9% of the yoghurts studied were found to be below this threshold. Dr Bernadette Moore, lead researcher of the study, said: “I think people, including parents, will be surprised to know just how much sugar there is in yoghurt. “My advice would be to buy natural yoghurt and mix in your own fruit.”
So-called ‘good bacteria’ that are contained in many popular probiotic drinks are “quite useless,” according to a group of scientists in Israel. Until now, probiotics have been seen as healthy and good for the gut, but the findings of the team from the Weizmann Institute of Science show otherwise. Their study is among the most detailed analyses to date of what happens when we consume probiotics. For their research, the team created a cocktail containing 11 common good bacteria and gave it to 25 healthy volunteers. Samples were then taken from each of the volunteer’s stomachs, as well as their small and large intestines. The scientists were looking to see where the bacteria successfully colonised and whether any changes in the activity of the gut were evident. Publishing their findings in the journal Cell, the scientists said that in half of cases the good bacteria literally went in one end and out the other, without providing any benefits whatsoever. In the rest, they hung around for a bit before being overwhelmed by the bacteria that commonly frequents our bodies. Speaking about the research, Dr Eran Elinav said people should not expect off-the-shelf products to provide them with definitive health benefits. He suggested that the future of probiotics lies in creating bacteria cocktails that are tailored to the specific needs of individuals. “And in that sense just buying probiotics at the supermarket without any tailoring, without any adjustment to the host, at least in part of the population, is quite useless,” he said.
Individuals who routinely drink more than one alcoholic beverage every day have an overabundance of bad bacteria and less good bacteria in their mouths, a new study has found. Compared to their non-drinking peers, drinkers have less good, such as Lactobacillales that help protect your gums, and more bad bacteria, such as certain Actinomyces, Bacteroidales, and Neisseria species that can lead to gum disease, heart problems and even some cancers. [Related reading: Regular excess drinking found to shorten life expectancy] Publishing their findings in the science journal Microbiome, the study authors said the acids found in alcoholic drinks could make the oral environment hostile for certain bacteria to grow, hence the lower number of so-called good bacteria. For the study, a group of more than 1,000 individuals had their saliva tested. The group included 270 non-drinkers, 614 moderate drinkers and 160 heavy drinkers. The results show that the drinkers had more Bacteroidales, Actinomyces and Neisseria species of bacteria, all potentially harmful, as well as fewer Lactobacillales, a family of bacteria associated with a reduction of gum inflammation. Talking about the findings of the study, Jiyoung Ahn, the study's senior investigator and an epidemiologist at the NYU School of Medicine, said: "heavy alcohol intake is a known risk factor for multiple chronic diseases, including cancers (head and neck, esophagus, colon and breast), liver disease and cardiovascular diseases."
A Mediterranean-inspired meal with lashings of virgin olive oil may help to protect your heart, according to new research. Cholesterol is carried around the blood by two different types of molecules called lipoproteins: low-density lipoprotein (LDL) and high-density lipoprotein (HDL). You'll most likely know LDL as "bad cholesterol". That's because high levels of LDL can lead to plaque building up in arteries, which can result in heart disease and stroke. HDL, on the other hand, the so-called "good bacteria", actually absorbs cholesterol and carries it to the liver where it is flushed from the body. That's why having high levels of HDL can reduce your risk of heart disease and stroke. Previous research has shown that the Mediterranean diet can protect against the development of heart disease as it improves the lipid profile of HDLs. The new research - which was led by Montserrat Fitó, Ph.D., coordinator of the Cardiovascular Risk and Nutrition Research Group at the Hospital del Mar Medical Research Institute in Barcelona, Spain - aimed to determine whether eating a Mediterranean diet rich in virgin olive oil or nuts over a long period of time would improve the beneficial properties of HDL in humans. Fitó's team randomly selected a total of 296 people who already had a high risk of heart disease and were participating in a separate study. They had an average age of 66 and were assigned to one of three diets for a year. They found that the individuals on the Mediterranean diet enriched with virgin olive oil had improved HDL functions. "Following a Mediterranean diet rich in virgin olive oil could protect our cardiovascular health in several ways, including making our 'good cholesterol' work in a more complete way," said Fitó.