She graduated from Concord Academy and then from Columbia University, where she earned a degree in French literature. While a student at Columbia, Lo spent time at its French language institute in Paris. It was there that she developed a love for French cuisine. A year after graduating from college she moved back to Paris to enroll at the culinary school L’Ecole Ritz-Escoffier. While a student there, she interned with top French chefs Guy Savoy and Michel Rostang.
After completing culinary school in Paris, Lo returned to New York where she worked at several restaurants including Chanterelle, Can, a French-Vietnamese restaurant, and Maxim's. She then moved to Mirezi restaurant, where she earned headlines and rave reviews from restaurant critics, including Ruth Reichl from The New York Times.
In 2000, Anita Lo and her business partner Jennifer Scism opened Annisa in New York's Greenwich Village. Annisa received a two-star review from The New York Times, Lo was named to Food & Wine magazine's list of the ten “Best New Chefs in America”, and The Village Voice named her the “Best New Restaurant Chef.”
In 2005, Anita Lo co-founded Rickshaw, a dumpling bar with several locations in New York City. She left Rickshaw in 2010, saying that she wanted to devote more time to the recently re-opened Annisa and to her other professional interests. In 2008, she opened Bar Q, a barbecue-Asian fusion restaurant in Greenwich Village. Bar Q received favorable food reviews but somewhat critical reviews for service and was not universally well received by residents in the neighborhood. It closed after ten months.
On July 4, 2009, Annisa was destroyed by fire. The restaurant reopened in April 2010 at the same location. The reopened restaurant was reviewed again by The New York Times and again received two stars. Scism also left Annisa in June 2010, leaving Lo as the sole owner. In 2011, the Greenwich Village Society for Historic Preservation recognized the restaurant's excellence with a Village Award. Annisa received three stars from The New York Times in 2014.
In 2015, Anita Lo was the first female guest chef to cook for a State dinner at the White House. She prepared a 4 course meal for the visiting Chinese president, Xi Jinping and his wife Peng Liyuan. In May 2017, after 17 years of business, she closed the Annisa on financial grounds, because of the continuous increase of real estate taxes and of minimum wages.
- 2005: Appearance on the first season of Iron Chef America. She competed against Iron Chef Mario Batali in Battle Mushrooms, defeating Batali by a score of 54-45. She was the first challenger to win a battle on Iron Chef America and remained the only female challenger to win until Traci Des Jardins defeated Batali in Episode 5 of Season 2.
- 2009: Contestant on the first season of Top Chef Masters. She finished in fourth place among the 24 competing chefs, earning $20,000 for her chosen charity, SHARE.
- 2011: Contestant on Chopped: All-Stars Tournament. She lost to Nate Appleman.
- Annisa Restaurant, Annisa Restaurant Biography Retrieved 2010-10-07.
- Most Powerful Women in New York 2007, Crainsnewyork.com, 2007
- Top Chef Biography, Anita Lo Top Chef Masters Official Biography Archived August 19, 2010, at the Wayback Machine Retrieved 2010-10-07.
- The New York Times, Anita Lo Leaves Rickshaw Dumpling Bar 2010-07-06. Retrieved 2010-10-08.
- Gothamist, Anita Lo's Bar Q Has Closed Archived 2009-08-21 at the Wayback Machine 2009-02-17. Retrieved 2010-10-07.
- Bloomberg News, Columbia Graduate Cooks Feng Shui Menus at Annisa 2010-08-18. Retrieved 2010-10-07.
- The New York Times, Annisa Restaurant Review 2010-06-10. Retrieved 2010-10-07.
- "Awards" on the Greenwich Village Society for Historic Preservation website
- The New York Times, Annisa Loses Its Host, and an Owner 2010-07-16. Retrieved 2010-10-07.
- Sierra Tishgart, After 17 Years, This 3-Star Chef’s Closing Her Restaurant Because It’s ‘Grow or Die’, Grubstreet.com, 2 February 2017
- Melissa McCart, Update: Annisa’s Last Day of Service is May 27, Eater.com, 12 January 2017