Exciting stem cell research, fermented foods, vitamin D and more about flu shots top this week

Summary: An acid bath creates pluripotent stem cells from adult cells; Website goodrx.com and their mobile app gives you good drug prices; Monitoring vitamin D levels is important when taking supplements; Dr Dawn criticizes study showing association of vitamin D with skin cancer; Will flu shot for younger people work for seniors? Trying to find the cause of a strange sharp leg pain; What supplements to take for nail fungus after a damaged finger? Growing your own probiotics in yogurt and other fermented foods; Research in biodegradable polymers and stem cells to make artificial ligaments and other organs; Is my immune system good enough for a desensitizing program for my OCD?