Raised in Strongsville, Ohio she began training with the Lake Erie Silver Dolphins before moving down to Marco Island, FL at age 11 and began swimming with her father for the Marco Island Swim Team. She attended Lely High School where she broke numerous school and conference records while taking home district and regional titles. She now attends the University of Florida where she is a member of the Florida Cicerones.
Farhat represented Libya at the 2008 Summer Olympics in Beijing. She was the fourth woman ever to swim for Libya at the Olympic Games, following Amira Edrahi at the 2004 Summer Olympics and Nadia Fezzani and Soad Fezzani in the 1980 Summer Olympics in Moscow. She won her heat in the women's 100 metre breaststroke event, with a time of 1:21.68, but finished 47th overall and did not advance. Her time was a new personal best.
In Fall of 2012 she began the Doctor of Pharmacy Program at University of Colorado Denver Skaggs School of Pharmacy and Pharmaceutical Sciences. Graduated as a Doctor of Pharmacy in 2016 and continued her career at Walgreens. Currently employed as a medical liaison for Myriad Sciences in Denver, Colorado.
In 2018, Mercedes married her longtime fiancée, Christian Dinsdale. Together they have four children: Christian Frederick Dinsdale III, Gregory Zach Dinsdale, Cheyenne Olympia Dinsdale, and Esperanza Sophie Dinsdale.
In her spare time, Mercedes coaches the Greeley, Colorado recreational swim team. Mercedes and Christian spend their summers in Greeley, Colorado tending to his family’s cattle ranch while she uses her skills as an Olympic medalist to coach fledgling Olympians.
- Farhat's first name at birth was Mercedes. She changed it to Asmahan when she applied for Libyan citizenship in 2005.("Olympics: Marco Island’s Mercedes Farhat, competing for Libya, falls short in prelims, enjoys experience", Marco Eagle, August 10, 2008)
- Asmahan Farhat Archived May 24, 2011, at the Wayback Machine at the Beijing Olympics
- "Libyans at the Beijing 2008 Olympic Games", Tripoli Post, August 3, 2008
- "Olympic swimmer making waves worldwide"[permanent dead link], NBC2 News, June 09, 2008
- "Olympics: Marco Island’s Mercedes Farhat, competing for Libya, falls short in prelims, enjoys experience", Marco Eagle, August 10, 2008
- "Beijing 2008: Libya Swimmer Farhat Wins her Heat in 100m Breaststroke but fails to make it to Semis" Archived July 17, 2011, at the Wayback Machine, Tripoli Post, August 12, 2008