The global fitness and wellness community is mourning the loss of Stephanie Buttermore, a respected fitness influencer, researcher, and educator who passed away on March 6, 2026, at the age of 36.
Born on February 25, 1990, Buttermore built a unique reputation for combining science with practical fitness advice. She held a Ph.D. in pathology and cell biology, where her academic research focused on the molecular mechanisms involved in ovarian cancer. Alongside her scientific career, she became widely known for sharing evidence-based insights about health, nutrition, and training through her popular online platforms.
Buttermore gained international recognition through her YouTube channel and social media presence, where she reached more than one million subscribers and hundreds of thousands of followers. Her content often tackled complex topics such as metabolism, dieting, and body image in a way that was accessible to everyday audiences.
One of the most widely discussed chapters of her online journey was her “All-In” approach, where she openly documented her decision to step away from restrictive dieting and rebuild a healthier relationship with food and body image. The series resonated with many viewers and sparked global conversations about body positivity, balance, and long-term wellness.
Beyond her online influence, Buttermore was admired for her dedication to women’s health advocacy and her ability to bridge the gap between scientific research and everyday fitness practices. Many followers credited her work with helping them better understand their bodies and develop healthier perspectives toward nutrition and exercise.
News of her passing was shared by her fiancé, fellow fitness creator Jeff Nippard, in a statement released on March 6. In the message, he asked for privacy as family and loved ones mourn the profound loss. At the time of the announcement, the cause of death had not been publicly disclosed.
Tributes from fans, fellow creators, and members of the scientific community have poured in across social media, remembering Stephanie Buttermore for her intelligence, honesty, and the positive impact she had on countless lives around the world. Her legacy continues through the knowledge she shared and the supportive community she helped build.