Researchers at Lund University in Sweden have discovered a new link between gut bacteria and obesity. They found that certain amino acids in our blood can be connected to both obesity and the composition of the gut microbiome. We know less about the significance of our gut bacteria than what many books and magazines on the subject seem to suggest. A lot of the research on the topic is based on animal studies which cannot be directly applied to humans.

Scientists have identified a hormone that could help prepare the womb lining for pregnancy, research shows. The hormone helps prime cells for implantation, a vital stage in early pregnancy when a fertilised egg attaches to the womb lining, the study suggests. The discovery - made by testing tissue from women aged in their forties - could help scientists develop ways to improve fertility.

On average, 1 in 10 children who enroll in pediatric phase I cancer trials are improved after the trial, and 1 in 50 die from drug-related complications, according to a new systematic review and meta-analysis published this week in PLOS Medicine by Jonathan Kimmelman from McGill University, Canada, and colleagues.

Researchers have found that excess levels of calcium in brain cells may lead to the formation of toxic clusters that are the hallmark of Parkinson's disease. The international team, led by the University of Cambridge, found that calcium can mediate the interaction between small membranous structures inside nerve endings, which are important for neuronal signalling in the brain, and alpha-synuclein, the protein associated with Parkinson's disease.

Women who work as cleaners or regularly use cleaning sprays or other cleaning products at home appear to experience a greater decline in lung function over time than women who do not clean, according to new research published online in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

A drug commonly used to control high blood pressure may also help prevent the onset of type 1 diabetes in up to 60 percent of those at risk for the disease, according to researchers at the University of Colorado Anschutz Medical Campus and the University of Florida in Gainesville. The study was published online this week in the Journal of Clinical Investigation.

A diet rich in saturated fat and sugar not only leads to obesity, it creates inflammation in the nucleus accumbens, a part of the brain that controls mood and reward. And this inflammation leads to depressive, anxious and compulsive behaviours associated with metabolic dysfunction and obesity, according to a new study by researchers at the University of Montreal Hospital Research Centre (CRCHUM).