Posts tagged with "News-Medical.net"

Who knew? Steak and chicken affect blood cholesterol equally

June 6, 2019

Many people who are health-conscious limit the amount of red meat they consume, preferring to have white meat, because they believe it is lower in cholesterol.

Wrong. Contrary to popular belief, beef and turkey have the same effect on cholesterol levels, when saturated fat levels are equivalent, base on findings of a study published on June 4 in the American Journal of Clinical Nutrition, News-Medical.net reports.

The study, led by scientists at Children’s Hospital Oakland Research Institute (CHORI)– the research arm of UCSF Benioff Children’s Hospital Oakland—surprised the researchers with the discovery that consuming high levels of red meat or white poultry resulted in higher blood cholesterol levels than consuming a comparable amount of plant proteins. Moreover, this effect was observed whether or not the diet contained high levels of saturated fat, which increased blood cholesterol to the same extent with all three protein sources.

Indeed, the lead author of the study, Ronald Krauss, M.D., senior scientist and director of Atherosclerosis Research at CHORI, commented, “When we planned this study, we expected red meat to have a more adverse effect on blood cholesterol levels than white meat, but we were surprised that this was not the case: Their effects on cholesterol are identical when saturated fat levels are equivalent.”

Krauss, who also is a UCSF professor of Medicine, noted that the meats studied did not include grass-fed beef or processed products such as bacon or sausage; nor did it include fish.

But the results were notable, as they indicated that restricting meat altogether, whether red or white, is more advisable for lowering blood cholesterol levels than previously thought.

No surprise: The study found that plant proteins, such as beans, are the healthiest for blood cholesterol.

This study, dubbed the APPROACH (Animal and Plant Protein and Cardiovascular Health) trial, also found that consuming high amounts of saturated fat increased concentrations of large cholesterol-enriched LDL particles, which have a weaker connection to cardiovascular disease than smaller LDL particles.

Similarly, red and white meat increased amounts of large LDL in comparison to nonmeat diets. Therefore, using standard LDL cholesterol levels as the measure of cardiovascular risk may lead to overestimating that risk for both higher meat and saturated fat intakes, as standard LDL cholesterol tests may primarily reflect levels of larger LDL particles.

“Our results indicate that current advice to restrict red meat and not white meat should not be based only on their effects on blood cholesterol,” Krauss said. “Indeed, other effects of red meat consumption could contribute to heart disease, and these effects should be explored in more detail in an effort to improve health.”

Research contact: rkrauss@chori.org

Another mommy meltdown: Breast pumps could be transmitting asthma-causing bacteria

March 20, 2019

What’s a mother to do? In news that is especially bad for working moms—but also could complicate life significantly for stay-at-home moms—researchers at the University of Manitoba in Canada say they have found harmful bacteria in the mouths of infants who have been fed breast-pumped milk, News-Medical.net reports.

The study results—published in the journal, Cell Host & Microbe on February 13— revealed that breast pumps may not be as safe as previously thought. In fact, they may be contaminated with bacteria that can cause asthma in the babies later in life.

Led by Shirin Moosavi, a Ph.D. student in Medical Microbiology and Infectious Diseases, the researchers compared babies who had been fed breast milk that had been pumped to babies who were directly breastfed.

Results showed that babies who were being directly breastfed had a rich diversity of bacteria in their mouths called the microbiome—which is beneficial for an infant’s  health and immunity.

On the other hand babies that were fed milk that had been pumped had harmful bacteria in their mouths that led to an increased risk of their getting asthma later in life. Indeed, the researchers believe, harmful bacteria thrive within the breast pumps and can be picked up by the babies when they use the bottles where the pumped milk is stored.

The bacterial genes from breast milks of 393 healthy mothers of infants aged three months to four months old were analyzed in the course of the study. The mothers and babies were part of the Canadian Healthy Infant Longitudinal Development (CHILD) study. The mothers are being tracked from their pregnancy until their babies reach adolescence for the longitudinal study.

The authors of the study write, “Although previously considered sterile, breast milk is now known to contain a complex community of bacteria that helps establish the infant gut microbiota … If this process is disrupted, the infant may develop a dysbiotic microbiota, causing predisposition to chronic diseases such as allergy, asthma and obesity.”

Results showed that milk given via breast pumps was found to contain high numbers of harmful bacteria known as “opportunistic pathogens.” While under normal conditions thee bacteria are harmless, opportunistic pathogens can lead to infections when the host immunity is low.

The authors note that respiratory tract infections caused by opportunistic pathogens can lead to repeated inflammation of the lungs and airways—and this can lead to an increased risk of asthma later in life.

The researchers warn that more study and understanding is needed before mothers stop feeding their babies pumped milk. “We need to understand the differences that happen after milk is expressed and stored,” co-author Meghan B. Azad said. “It’s not like pumped milk is awful, and it’s still very different [than]formula,” she explained. Azad said. “It’s important to know the differences so we can ask why, and figure out what to do to address any deficit.”

Research contact: gsa@umgsa.org

Researchers say wireless earphones could be a source of carcinogenic radiation

March 15, 2019

While most of us have worried at one time or another that our use of smartphones could endanger our health, it turns out that the earphones—specifically, wireless earbuds—could pose a much greater danger, News-Medical.net reports.

Specifically, medical researchers are worried about wireless earbuds, such as the AirPods introduced by Apple in 2016. These wireless earpieces transmit data using a type of electromagnetic frequency (EMF) radiowave via Bluetooth technology. The proximity of this radiation to the brains of the users is cause for concern, they say.

In fact, News-Medical.net notes, a group of 250 experts and researchers have signed a petition to the United Nations and World Health Organization to stop the use of these and other wireless devices.

The petition reads, “Based upon peer-reviewed, published research, we have serious concerns regarding the ubiquitous and increasing exposure to EMF generated by electric and wireless devices.”

It goes on to say that the risk of cancer, neurological disorders, and DNA damage that have been associated with EMF exposure cannot be ignored.

Jerry Phillips, a professor of biochemistry at the University of Colorado at Colorado Springs agrees with the medical alert. He told the news outlet, “My concern for AirPods,” he says, “is that their placement in the ear canal exposes tissues in the head to relatively high levels of radio-frequency radiation.” Phillips is one of the many scientists who have called for a restriction on use of such devices.

The International Agency for Research on Cancer recently confirmed that these EMF waves could be “possibly carcinogenic” to humans. These waves are similar to UV rays or x-rays—but are not as powerful. They can cause burns at high concentration but are generally of less impact. The debate about whether they are carcinogenic is still ongoing.

The World Health Organization developed guidelines that regulate the amount of EMF the devices are allowed to emit. The petition adds, “The various agencies setting safety standards have failed to impose sufficient guidelines to protect the general public, particularly children who are more vulnerable to the effects of EMF. By not taking action, the WHO is failing to fulfill its role as the preeminent international public health agency.”

The guidelines insist that phones should be kept away from the body when not in use. Sleeping with the phone is not a good practice and usage of headsets or headphones to conduct phone calls is suggested as a good option.

Research contact @AzoNetwork