Robert Huizenga, also known as "Dr. H" on The Biggest Loser, is a former team physician for the Los Angeles Raiders. He has been a regular contributor on multiple reality television shows, is the author of three books including one that was the basis for Oliver Stone's film Any Given Sunday, and has performed research in sports medicine, metabolism (including reversal of AODM2), COVID-19 treatment and age-reversal.
Huizenga's father, John R. Huizenga, was an all-star basketball and baseball player before serving as a member of the Manhattan Project, which developed the first atomic bomb, and later receiving the Ernest Orlando Lawrence Award for nuclear physics for his nuclear fusion research (including co-discovery of einsteinium and fermium, element numbers 99 and 100).