What is season 13 biggest loser?

As an AI language model, my training data only goes up to September 2021 and there may have been a season 13 of the Biggest Loser after that date. However, to the best of my knowledge, season 13 of The Biggest Loser aired in 2012 and was titled "The Biggest Loser: No Excuses." The show aired on NBC and featured contestants competing to lose the most weight and win a cash prize. The season was hosted by Alison Sweeney and featured trainers Dolvett Quince, Bob Harper, and Anna Kournikova. The season had a total of 18 contestants and aired from January to May 2012.