First-ever spontaneous recovery from HIV recorded—what it means for immune research; What’s the best form of magnesium? Supplements for osteoporosis; Vitamin D deficiency linked to painful diabetic neuropathy; Melatonin supports recovery from childhood concussion; Omega-3 fatty acids protect brain from shrinkage due to air pollution; Sleep doctors call for abolition of daylight savings time; Vitamin C counteracts age-related muscle decline.