Fidji Simo says Mark Zuckerberg gave her one piece of health advice years ago, and she wishes she had listened

A chronic illness led Fidji Simo to step down from her full-time role at OpenAI. David Buchan/Variety/Penske Media via Getty Images Fidji Simo said her former boss, Mark Zuckerberg, told her to take a year off to recover from an illness. On Thursday, Simo, a top OpenAI exec, said she stepped down after a flare-up of a condition called POTS. In an X post, she said she wished she had listened to Zuckerberg at the time. When Fidji Simo resigned as OpenAI's CEO of applications on Thursday, she shared a health lesson she learned the hard way. Simo has postural orthostatic tachycardia syndrome , or POTS. On Thursday, she wrote on social media that she has lived with the chronic illness for seven years. She wrote that she got sick while at Facebook, where she worked in various roles for a decade.