10 Photos of Stephanie Buttermore: Jeff Nippard's Fiancée Who Just Passed Away

The fitness community has been plunged into mourning following the sudden and tragic loss of one of its most scientific minds. Dr Stephanie Buttermore, a renowned influencer and researcher who bridged the gap between clinical pathology and weightlifting, has died at the age of 36.

Buttermore was known for her vulnerability and her fitness journey. Her passing leaves a profound void in the lives of her millions of followers and her long-term partner, Jeff Nippard.

Who Is Dr Stephanie Buttermore

Stephanie Buttermore was far more than a typical fitness model; she was a highly educated scientist who used her platform to debunk toxic diet myths. Holding a PhD in pathology and cell biology from the University of South Florida, her primary research focused on the molecular mechanisms of ovarian cancer.

She famously pivoted from academia to full-time content creation, where she garnered over 1.3 million subscribers by applying a rigorous scientific approach to nutrition and exercise. Buttermore's most significant impact came through her 'All In Weight Gain Journey,' a period in which she intentionally stopped restrictive dieting to heal her relationship with food and address her chronic hunger.

By documenting her significant weight gain and subsequent stabilisation, she provided a roadmap for thousands of women struggling with disordered eating. Her transparency about her body's changes made her a beacon of authenticity in an industry often criticised for its obsession with perfection.

A Sudden Loss and the Silence of a Grieving Fiance

The news of her passing broke on 6 March 2026, sending shockwaves through social media platforms where she had been a mainstay for nearly a decade. Her fiancé, Canadian bodybuilder and YouTuber Jeff Nippard, confirmed the devastating news through a statement on his Instagram profile.

'It is with profound sorrow that we share the sudden passing of Jeff's fiancée and partner of ten years, Stephanie,' the announcement read. 'As many of you know, Stephani 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.'

While the community reels from the announcement, a specific cause of death has not yet been released to the public. Her death followed a period of relative silence on social media. Some speculated that 'she stepped away for her mental health.'

Nippard has requested privacy for the family as they navigate this immense grief and celebrate the legacy of a woman who dedicated her life to helping others understand their bodies.

A Decade of Love and the Proposal That Captivated Fans

Stephanie and Jeff Nippard were widely considered the 'power couple' of the evidence-based fitness world, having shared a life and career for 10 years. Their relationship was a constant fixture on each other's social media channels, where they frequently collaborated on educational videos and travel vlogs. They were often praised for their intellectual compatibility, with both prioritising data and research in their respective fitness philosophies.

The couple's journey reached a milestone in November 2022 when Jeff proposed to Stephanie during a trip to Florida. The engagement came after years of fan speculation and brought immense joy to their shared audience.

'We grew together as we learned from each other, travelled the world together, always supported each other, and used the power couple equation to build each other up in so many different ways,' Nippard wrote in a post announcing their engagement on Instagram.

Despite the high-profile nature of their careers, they maintained a grounded partnership, supporting one another through competitive seasons, PhD dissertations, and the challenges of online fame. While Nippard looked forward to a life with Stephanie, it appeared that there were no more chapters left for them together.