Stephanie Buttermore, the fitness influencer and researcher who built a large online following, has died aged 36, according to an Instagram statement posted on Friday by her longtime fiancée, the Canadian bodybuilder Jeff Nippard. The announcement did not disclose a cause of death, which remained unconfirmed at the time of reporting.
Buttermore had already stepped back from the public churn of fitness social media in 2024, after years in which her YouTube channel and Instagram presence made her a recognisable name well beyond niche gym culture. She had more than 1.17 million YouTube subscribers and over 500,000 Instagram followers before leaving those platforms behind.
