Richman’s acting career has included guest roles on Guiding Light, All My Children, Law & Order: Trial by Jury, and he portrayed God as a butcher on Joan of Arcadia in 2004. In addition to appearing in regional theater productions throughout the United States, he was also seen in several national television commercials.

Richman is also the author of America the Edible: A Hungry History from Sea to Dining Sea, which was released on November 9, 2010, by Rodale Publishing.

On January 23, 2011, Richman appeared on Food Network’s Iron Chef America as a judge for a battle with Gruyère cheese as the theme ingredient.

Richman hosted Travel Channel’s The Traveler’s Guide to Life, which debuted on January 26, 2011, and Amazing Eats, a spin-off of his popular series Man v. Food and Man v. Food Nation, which premiered on January 11, 2012.

As a self-educated food expert and trained sushi chef, Richman has kept a travel journal that includes every restaurant he has visited since 1995. To maintain his health while indulging for his show on Travel Channel’s Man v. Food (which originally aired between 2008 and 2012), Richman would exercise twice a day while on the road. When the schedule permitted, he would not eat the day before a challenge. He also tried to stay hydrated by drinking lots of water or club soda and forgoing coffee and soft drinks. Richman retired from competitive eating in January 2012; thus, Man v. Food Nation was his final season of Man v. Food. During his time as a competitive eater, Richman gained a considerable amount of weight and became depressed. After retiring from competitive eating, he lost 60 pounds (27 kg).

Richman hosts the Travel Channel’s Adam Richman’s Fandemonium. An NBC game show called Food Fighters, with Richman as host, premiered on July 22, 2014.

In June 2014, Richman found himself embroiled in a social media controversy over comments he made about his weight loss, which were accompanied by a hashtag said to be linked to eating disorders. Highlighting the controversial nature of the encounter are allegations that Richman referred to one or more of his followers as “haters” and further advised them to “grab a razor blade & draw a bath”. He later apologized, but the Travel Channel postponed Richman’s series Man Finds Food.

On June 8, 2014, Richman represented the “Rest of the World” team in the annual Soccer Aid match against England at Old Trafford, Manchester in a game that combined former professional players and celebrities. Richman was quoted as saying that he lost 30 kilograms (66 lb) for the game, and cried when he was asked to take part.

In 2015, Richman told The Independent that he eats a vegan diet when training for soccer.

Also in 2015, Richman was a judge on the British television series BBQ Champ, hosted by Myleene Klass and broadcast on ITV.

In June 2020 Richman became a shareholder in English football club Grimsby Town, he had also previously put money into the club via a fan fundraising scheme called “Operation Promotion”.