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 change

And an honorable mention goes to research on a new way to induce healthy fat.