In a heartbreaking development, Stephanie Buttermore, a prominent fitness influencer and cancer researcher, has passed away at the age of 36. Her fiancé, Jeff Nippard, shared the news of her sudden death on Instagram on March 6. The couple had been together for a decade, with their engagement announced in October 2022.
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In a statement released via social media, Nippard expressed his profound sorrow, emphasising the significant impact Buttermore had on his life. “It is with profound sorrow that we share the sudden passing of Jeff’s fiancée and partner of ten years, Stephanie,” the announcement revealed. The statement conveyed a heartfelt tribute to Buttermore, highlighting her warmth, compassion, and dedication to her family and work in cancer research. It concluded with a request for privacy, acknowledging the difficult time ahead for Nippard and their loved ones.

Buttermore’s passing comes shortly after she celebrated her birthday on February 25. Just a fortnight prior, Nippard had shared a joyful image of the couple, in which they beamed together during Valentine’s Day. His caption alluded to their close relationship, as they enjoyed a serene tea time together, a moment that resonated with their followers.

Before her tragic passing, Buttermore had established herself as a successful figure in the fitness industry, amassing 525,000 followers on Instagram and over one million subscribers on YouTube. Her content focused on women’s health journeys, promoting body positivity and intuitive eating. However, in May 2024, she took a step back from her influencer career to prioritise her mental health. In her announcement, she candidly shared how anxiety had overwhelmed her, but expressed optimism, stating that her break had significantly improved her mental state.
In addition to her influence in the fitness community, Buttermore was also a respected scientist. She held a PhD in pathology and cell biology, concentrating on the molecular mechanisms of ovarian cancer progression. Throughout her career, she combined her passion for health and science, hoping to inspire others through her research and advocacy.
Nippard and Buttermore’s relationship gained public attention in their engagement announcement, which detailed how their connection blossomed through social media. Initially, they exchanged messages that quickly developed into a frequent virtual communication, leading to their first date, which incorporated a shoulder workout—a memorable start to their shared life.
Following the news of Buttermore’s death, numerous heartfelt tributes poured in from fans and followers. Many expressed their admiration for her vibrant spirit and sent condolences to Nippard. Comments on his social media echoed a collective sorrow, with one follower noting Buttermore’s beauty both inside and out, while offering prayers for Nippard during this devastating time.
Buttermore’s legacy will undoubtedly endure through the impact she had on both her personal relationships and her professional contributions. Her dedication to both fitness and cancer research has inspired many, leaving a significant mark on those who followed her journey. The community she built through social media will remember her not just as an influencer but as a beacon of positivity and compassion in their lives.
As tributes continue to celebrate her life, friends, followers, and family are left to mourn the loss of a cherished individual who gave so much to those around her. The world of fitness and science has lost a remarkable talent, but her contributions will be remembered and honoured by those she touched.
