The importance of vitamin D in your diet

CHICAGO (WLS) -- About 70 percent of the world's population is vitamin D deficient, even those who live in sunny climates like Florida.

In her new book, "Vitamin D is the Key," Alice Branton says vitamin D is critical to good health. A lack of Vitamin D can lead to poor immunity, digestive issues, mood disorders and more.

Branton, CEO of Trivdei Effect, sat down with ABC7 to talk about the importance of the vitamin in one's diet.