As Miss France, Marine Lorphelin has promoted two causes: children's health and the donation of organs. She has signed documents expressing her wish for her organs to be donated post-mortem to those in need, has run in the 2013 Paris Marathon, and has performed numerous dangerous tasks in the Fort Boyard programme to raise 18,000 euros for Mecenat Chirurgie Cardiaque, a French charity that raises money for the heart transplants of children suffering from heart disease. To achieve this, she had to perform tasks as difficult as a bungee jump, riding a bicycle underwater, and diving in ice-cold water to uncover clues about the prize. She participated in the programme for the second time in June 2014.