Stephanie Buttermore, the fitness influencer known for creating positive social media content on body positivity, died, her fiancé, Jeff Nippard, announced on March 6, 2026. She had just turned 36 two weeks beforehand. Naturally, heartbroken fans wondered what the cause of death was since Buttermore was known in the health and fitness space.
“It is with profound sorrow that we share the sudden passing of Jeff’s fiancée and partner of 10 years, Stephanie,” an Instagram post shared to Nippard’s account read. “As many of you know, Stephanie meant the world to Jeff. She will be remembered for her warmth and compassion, her love for her family, and her PhD research on ovarian cancer. We kindly ask for privacy as we navigate this tragic loss. Thank you for your understanding and support during this difficult time.”
Learn what we know so far about Buttermore’s unexpected death below.
Buttermore was a fitness influencer and a cancer research Ph.D. For years, she shared her fitness journey with her followers and promoted a healthier mindset on self-love, body positivity and community. At times, the late content creator would share gym photos and videos of herself without flexing or posing, showing her fans that all body types were different.
Buttermore was also focused on ovarian cancer research.
