The heightened risk for health problems in infants delivered by Caesarean section before 39 weeks.

The recommended form of vitamin D in supplements.

Number of states with teams competing in Live Healthy America.

PDQhealth is proud to introduce The Ms.Fits! This team from the University of Iowa will be taking part in Live Healthy Iowa, a 100-day program that challenges participants to eat better, be more active and shed some pounds. We’ll be tracking their progress each week. Along the way, PDQhealth plans to publish interviews with experts in fitness, motivation, and nutrition designed to help our team (and our readers) achieve their goals. Check in for more soon. And share your comments with the Ms.Fits–or else just cheer them on.

Winter has settled in. The days are short. And medical experts worry that many of us may be falling short on a vitamin that’s far more important than anyone realized.