Stephanie Buttermore Dead at 36: Jeff Nippard's Fiancée Passes Suddenly, Cause of Death Unknown
The fitness and research communities are in shock following the sudden passing of Dr. Stephanie Buttermore, the beloved fitness influencer and fiancée of Canadian bodybuilder Jeff Nippard. She died on March 6, 2026, just days after turning 36. No cause of death has been announced.
Jeff Nippard Announces Stephanie Buttermore's Passing
Popular Canadian bodybuilder Jeff Nippard announced the heartbreaking news of his longtime fiancée Stephanie Buttermore's death on March 6. His team issued a statement on Instagram: "It is with profound sorrow that we share the sudden passing of Jeff's fiancée and partner of ten years, Stephanie."
The statement 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."
Her death came as a shock to the community. Nippard had posted a photo of the two together on Valentine's Day — just three weeks before her passing — in which Buttermore looked healthy and happy, flashing a bright smile.
Stephanie Buttermore Cause of Death: What We Know
A cause of death was not immediately disclosed. Buttermore did not reveal any major health issues publicly before her passing. She had taken a step back from social media in 2024 to focus on her mental health, and her final Instagram post from May 2024 described how her previously crippling anxiety had improved dramatically since stepping away from the platform.
Her last known public moment with Jeff Nippard came on February 14, 2026, when he posted a Valentine's Day photo of them together. She commented "Love you forever" on that post — unaware it would become one of her final public messages.
As of now, the cause of Stephanie Buttermore's death remains unclear, and her family has asked for privacy during this difficult time. She had reportedly been planning a return to her platform before her passing.
Who Was Dr. Stephanie Buttermore?
Stephanie Buttermore was far more than a fitness influencer. She held a PhD in Pathology and Cell Biology from the University of South Florida, along with multiple master's degrees in Medical Sciences. Her research focused on ovarian cancer detection and early screening, where she discovered that a protein called RHAMM could potentially be used as an early screening marker for the disease through urine tests.
She gained over 500,000 followers on Instagram and over 1 million on YouTube by sharing her fitness and nutrition journey, blending her scientific background with accessible content on exercise, diet, and body positivity.
Jeff Nippard and Stephanie Buttermore: Their Story
Nippard revealed the origin of their relationship in 2022: six years prior, he had slid into Buttermore's DMs and the two immediately formed a friendship, Skyping for three to four hours every day for about a month before he traveled from Canada to visit her in Florida.
The pair got engaged in October 2022. "Last month, I asked Steph to marry me and she said yes!" Nippard wrote at the time. "It's been an amazing journey of growth and love. Can't wait for the next chapter together."
Buttermore had just turned 36 on February 25, 2026 — only nine days before her death. The fitness and research communities have united in mourning the loss of one of their most inspiring figures.
