1 Billion People Are Vitamin D Deficient — Your Immune System Is Paying the Price
1 Billion People Are Vitamin D Deficient — Your Immune System Is Paying the Price
Vitamin D isn't a vitamin. It's a hormone. Your body manufactures it when ultraviolet light hits your skin. The problem? You live indoors. You wear sunscreen. You work under fluorescent lights. And your immune system — which depends on this hormone to function — is running on empty. This isn't a minor inconvenience. This is a global health crisis hiding in plain sight.