Stephanie Buttermore Obituary – Death: The fitness and science communities are mourning the loss of Stephanie Buttermore, who died suddenly at the age of 36. The news of her passing was shared on March 6, 2026, by her fiancé, Jeff Nippard, leaving fans and colleagues around the world heartbroken.
Stephanie Buttermore was widely recognized for blending scientific research with evidence-based fitness education. She held a PhD in biomedical sciences with research focused on ovarian cancer and used her academic background to promote science-driven health information through her online platforms.
Through her YouTube channel and social media presence, Buttermore built a large following—amassing more than 1 million YouTube subscribers and over 500,000 Instagram followers. Her content often explored topics such as nutrition, strength training, body image, and women’s health, while encouraging honesty about mental health and struggles within the fitness industry.
One of her most well-known projects was her widely discussed “All-In” experiment, in which she openly documented her journey to restore hormonal health and repair her relationship with food after years of restrictive dieting. Her transparency about body image, eating habits, and mental health resonated with thousands of viewers and helped spark broader discussions about wellness and sustainable fitness.
Buttermore and Nippard had been together for approximately a decade and announced their engagement in 2022. In his statement announcing her death, Nippard described her as a compassionate and loving person whose presence profoundly shaped his life. The couple frequently collaborated on fitness videos and educational content throughout their relationship.
Although the cause of her sudden death has not been publicly disclosed, tributes from fans, fellow creators, and members of the fitness community have poured in across social media, remembering her for her intelligence, kindness, and dedication to helping others live healthier lives.
Stephanie Buttermore’s legacy extends beyond social media. As both a scientist and educator, she helped bridge the gap between academic research and everyday fitness advice, inspiring many to approach health with compassion, evidence, and balance. Her work and influence will continue to impact the fitness and science communities for years to come.
