Who Is Stephanie Buttermore? 5 Things to Know About the Fitness Influencer Who Died at 36

Fitness influencer Stephanie Buttermore tragically died in March 2026 at the age of 36.

“It is with profound sorrow that we share the sudden passing of Jeff’s fiancée and partner of 10 years, Stephanie,” a social media statement from a spokesperson for Buttermore’s fiancé, Jeff Nippard, read. “As many of you know, Stephanie meant the world to Jeff.”

The statement continued, “She will be remembered for her warmth and compassion, her love for her family and her Ph.D 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.”

A cause of death was not immediately revealed for Buttermore, who got engaged to bodybuilder Nippard in 2022 after six years of dating.

Keep scrolling to learn more about Buttermore’s life and legacy:

Stephanie Buttermore Was a Fitness Educator and Social Media Star

Stephanie Buttermore was an influencer with more than 528,000 Instagram followers and 1 million YouTube subscribers at the time of her death. She shared content about fitness training, nutrition, beauty and other lifestyle subjects.

Stephanie Buttermore Researched Ovarian Cancer

Long before Stephanie Buttermore started posting on social media, she received her Ph. D and worked as a cancer scientist.

“I obtained my Ph.D. in pathology and cell biology with a focus on the molecular mechanisms that drive ovarian cancer progression,” a biography on her YouTube page reads. “I mix science and fitness into all facets of life. I currently do cancer research but LOVE to workout and eat good food.”

Stephanie Buttermore Was a Proud Advocate of Body Positivity 

Stephanie Buttermore was always proud of her body — no matter her size.

“I heard every fat-phobic slur under the sun when I gained weight,” Buttermore wrote via Instagram in March 2023, alongside a handful of swimsuit photos. “But, you know what, I look back at these pictures like DAMNNN … I was HAWWWT 🔥.”

She added, “The sentiment of ‘F the haters’ never personally worked for me. I mean, I wish it did, it would make life so much easier. I prefer to just focus on me, my goals and giving my energy to those who deserve it.”

Months later, Buttermore proclaimed via social media that she felt “super happy and comfortable” in her skin.

“I can live my life eating intuitively and my body feels naturally settled here,” she captioned a May 2023 upload.

Stephanie Buttermore and Jeff Nippard Were Together for 10 Years Before Her Death