Fitness Influencer Stephanie Buttermore Dies at 36
Stephanie Buttermore, a prominent fitness influencer and cancer research scientist, has died unexpectedly at the age of 36. The news was announced by her fiancé, Jeff Nippard, on Friday, March 6, 2026.
A Sudden Loss
Nippard’s team shared the heartbreaking news via Instagram and YouTube, describing Buttermore’s death as “sudden” and expressing profound sorrow People. The announcement highlighted Buttermore’s warmth, compassion, love for her family, and dedication to her PhD research on ovarian cancer.
Buttermore’s Background and Career
Buttermore held a PhD in pathology and cell biology, focusing on the molecular mechanisms driving ovarian cancer progression The Independent. She gained a significant following on social media, with over 1 million subscribers on YouTube and over 500,000 followers on Instagram, where she shared workout videos, body-positive content, and insights into her personal life with Nippard The Independent.
“All In” Challenge and Mental Health Advocacy
Buttermore was known for her “All In” challenge, where she ate upwards of 10,000 calories per day to promote healthy weight gain and body positivity for women. She also openly discussed her personal struggles with eating disorders and mental health. In May 2024, she announced her decision to step back from Instagram to prioritize her mental well-being, noting a significant improvement in her anxiety levels The Independent.
Relationship with Jeff Nippard
Buttermore and Nippard were together for a decade and became engaged in 2022 People. Nippard, a Canadian drug-free powerlifting and bodybuilding champion with over 8 million YouTube subscribers, has built a following sharing science-based lifting information.
Privacy Requested
Nippard’s team has requested privacy during this tough time. No details regarding the cause of Buttermore’s death have been released Fox News.
Outpouring of Support
Following the announcement, fans and fellow influencers flooded social media with messages of support for Nippard and remembrance of Buttermore. Influencer Buff Bunny expressed her condolences, describing Buttermore as an “amazing angel” who cared deeply for others Fox News.