HEALTH NEWS   ·         Blueberry powders shows endothelial benefits: Human data ·         Clinical study: Medicinal cannabis is a 'life-changing treatment' for people with Tourette syndrome ·         Obesity impairs the brain's response to nutrients, suggests study ·         New study links contraceptive pills and depression ·         Green tea may help reduce risk of heart attacks ·         Population health study: Alcohol consumption increases the risks of over 60 diseases