Not having enough vitamin D can increase the chance of losing muscle strength as you get older, according to a new study. The research looked at data from over 3,200 people aged 50 and above who didn’t have muscle weakness before. The study, which spanned four years, measured vitamin D levels through blood tests at the beginning and categorized them as enough, not quite enough, or not enough at all. After four years, researchers checked the participants’ grip strength as a way to see how strong their muscles were overall. This matters because losing muscle strength as you age is a big risk of falling, so having enough vitamin D is important for staying strong and preventing accidents.