Dr. Callyn Iwuala

Dr. Iwuala's Latest Work

PHOTO: Defense Secretary Pete Hegseth makes an announcement in this screen grab taken from a handout video from an unknown location, released on July 15, 2026.

Secretary Of Defense Pete Hegseth/X via via Reuters

Wellness July 17, 2026

What to know about testosterone after Defense Secretary Pete Hegseth directs screening for troops over 30

Katie Couric poses as Mariska Hargitay makes her Broadway debut in "Every Brilliant Thing" on June 2, 2026 in New York City.

Bruce Glikas/WireImage

Wellness July 9, 2026

Katie Couric reveals transient global amnesia diagnosis: What to know