Can vitamin D help fight cancer?

Can vitamin D help fight cancer? An intriguing new study in mice suggests that it might. Here’s what that could mean for humans. Our own immune system is one of our greatest allies in suppressing the development of cancer in our bodies, but it often needs a little push. One way of doing this is by using a class of medications called ‘checkpoint inhibitors.' These medicines release the brakes on certain immune cells—called killer T cells—that then try and kill …