The Friday Five covers five stories in health research that you may have missed this week. There are plenty of controversies and troubling ethical issues in science – and we get into many of them in our online magazine – but this news roundup focuses on scientific creativity and progress to give you a therapeutic dose of inspiration headed into the weekend.Here are the promising studies covered in this week's Friday Five:- Using graphene to repair shoulders- Testing for PTSD with saliva- Cancer detection with a microchip- Best posture for pill taking- Resilient food for climate changeAnd an honorable mention goes to research on a new way to induce healthy fat.