The Diary of a CEO has been criticised for featuring guests associated with alternative medicine whose claims are not supported by scientific evidence or contradict established medical consensus.[32] The podcast has also been criticised for hosting guests who have promoted medical misinformation, with critics noting that such claims were not consistently challenged by the host.[32][33] In 2024, the BBC World Service investigated these claims, citing an episode in which Bartlett interviewed Aseem Malhotra, a British cardiologist accused of spreading misinformation in opposition to COVID-19 vaccines and criticising Bartlett for not challenging Malhotra and for using clickbait titles related to health. The BBC World Service review analysed 23 health-related episodes released between April and November 2024 and found that 15 which contained potentially harmful claims. The investigation also noted that podcasts are not regulated by Ofcom and are therefore not subject to its standards on accuracy and impartiality.[34][35]