Ten years later, she made her first training at L'Oreal.

 Betancourt was considered to be a trustee for the work of her father, Eugen Scholler, the company's founder.

Forbes magazine estimated the Betancourt fortune in 2017 at about $ 40 billion and was the richest woman. It ranks 14th among the world's wealthiest. She had Alzheimer's disease, which made her move away from public life in 2012, the year she left the board of L'Oreal and abandoned any administrative position in the group.

The family-owned Titus Holding Company, headed by her daughter Francoise, is the largest shareholder in L'Oreal with 33.05% of the shares.

Lillian Betancourt's name in recent years has been associated with a legal battle that has led to the conviction of those close to her who have profited from her money for "dishonesty" as Betancourt's health has been declining.