‘My 600-Lb. Life’ star Dolly Martinez’s cause of death revealed

“My 600-Lb. Life” star Dolly Martinez died of congestive heart failure.

Martinez had been sick for a while with medical issues, Martinez’s mom, Staci Thurman, told TMZ Monday, adding that she went to the hospital on March 29 with “fluid on her heart and lungs.”

“She was put into a medically induced coma and placed on a ventilator the next day, but never recovered,” Thurman explained.

Thurman noted that her daughter was surrounded by friends and family when she died, including her sister, Lindsey Cooper.

Cooper was the one to announce the news of her passing at age 30 via Facebook on Saturday.

“Dolly had the brightest personality she could light up any room with her laughter, her kindness, and her loving spirit,” Cooper wrote. “She had a way of making everyone feel special, and her warmth will stay with us forever.”

“While our hearts are broken here, I find comfort in knowing she is now reunited with our dad in heaven. I can only imagine the joy of that reunion,” she added. “Rest peacefully, Dolly. You will always be loved, always be missed, and never forgotten. ❤️.”

Martinez appeared on Season 10 of TLC’s “My 600-Lb. Life,” which follows a year in the life of morbidly obese individuals. 

Her episode documented her struggles with food addiction as well as mental health issues.

During the show, she was on supplemental oxygen.

She did not get approved for weight-loss surgery at the end of the episode, but she did lose 40 pounds after weighing 593 pounds.

Multiple people featured on the TLC reality series have died, including Larry Myers, who passed away from a heart attack. Jr. back in June 2023.