Fitness Influencer Stephanie Buttermore Dies Suddenly at 36
Stephanie Buttermore, a well-known fitness influencer, PhD, and ovarian cancer researcher, has died unexpectedly at the age of 36. Her fiancé, Jeff Nippard, announced the heartbreaking news on social media on Friday, March 7, 2026.
A Sudden Loss
Nippard’s team shared a statement on Instagram and YouTube expressing “profound sorrow” over Buttermore’s “sudden” passing. “As many of you know, Stephanie meant the world to Jeff,” the post read. “She will be remembered for her warmth and compassion, her love for her family, and her PhD research on ovarian cancer.”
The announcement requested privacy for Nippard and his family during this difficult time. No details regarding the cause of death have been released according to Fox News.
Who Was Stephanie Buttermore?
Buttermore gained prominence on YouTube, amassing over a million subscribers with her content focused on nutrition, exercise, and personal experiences with eating disorders and mental health. Reddit users noted her dedication to her PhD research on ovarian cancer.
She was particularly known for her “All In” challenge, where she consumed over 10,000 calories daily to promote healthy weight gain and body positivity in women. Parade reported on her impact as a fitness influencer.
A Relationship of a Decade
Buttermore and Nippard had been together for ten years and became engaged in October 2022. Nippard previously shared that their relationship began after he messaged her on Instagram.
A Legacy of Research and Compassion
Stephanie Buttermore’s work extended beyond fitness influencing. Her PhD research focused on ovarian cancer, and she will be remembered for her dedication to both her scientific pursuits and her compassionate nature. Instagram posts highlighted her commitment to cancer research.
Support for Jeff Nippard
Following the announcement, fans and fellow influencers flooded Nippard’s social media with messages of support. Influencer Buff Bunny expressed her condolences, stating Buttermore was “an amazing angel” who “cared so deeply for others.”