"I just went, 'I can't really say who I am to myself,' which is a hard thing to face up to," Diaz said during a panel at the In Goop Health event on Saturday in Los Angeles, California, according to E! News.
The actress, whose last major role was Mrs. Hannigan in the 2014 "Annie" remake, said that two decades of travelling between film sets and her home took a toll on her well-being.
"I felt the need to make myself whole," she said at the event for Gwyneth Paltrow's wellness brand.
According to Vogue, Diaz's search for wholeness includes transcendental meditation.
Diaz has been nominated four times for a Golden Globe Award for "Gangs of New York," "Vanilla Sky," "Being John Malkovich," and "There's Something About Mary." As of now, she hasn't announced any upcoming projects.
Paltrow served as the moderator for the panel, which included Diaz, designer Tory Burch, model Miranda Kerr, and actress Nicole Richie.