A Martínez is one of the hosts of Morning Edition and Up First. He came to NPR in 2021 and is based out of NPR West. Before he joined KPCC, Martínez had never listened to public radio. He views his ...

Vitamin A is a fat-soluble vitamin that plays an essential role in maintaining vision, body growth, immune function, and reproductive health. The recommended dietary allowance (RDA) is 900 micrograms ...

All submissions must be made via our online submission system. Using this system, authors can upload manuscript files (text, figures, videos) directly to our office and check on the status of their ...

All manuscripts must be submitted via our online submission system using the Submit manuscript link. Using this system, authors can upload manuscript files (text, figures, videos) directly to our ...