Fitness influencer and cancer researcher Stephanie Buttermore has died at the age of 36, according to an announcement shared by her fiancé, bodybuilder and YouTuber Jeff Nippard.
The news was shared in a statement posted on Nippard’s Instagram account on March 6. The message said the couple’s family and friends are grieving the sudden loss and asked the public to respect their privacy. No cause of death has been publicly confirmed. (mint)

Buttermore was widely known in the global fitness community for her science-based approach to nutrition, training, and women’s health.
Announcement of Her Death
In the statement shared online, Nippard’s team described the loss as heartbreaking.

The message said Buttermore would be remembered for her “warmth and compassion,” as well as her love for her family and her scientific work studying ovarian cancer. The statement also noted that she had been Nippard’s partner for more than a decade. (mint)
The couple got engaged in October 2022 after years of being together and were considered one of the most recognized pairs in the online fitness world.
A Career in Fitness and Science
Buttermore built a large following on social media through educational fitness content that combined scientific research with practical training advice.
Her YouTube channel attracted more than one million subscribers, while her Instagram account had over 500,000 followers. Her content often focused on body image, intuitive eating, and women’s health. (The Indian Express)
Beyond social media, she was also a scientist. Buttermore earned a PhD in pathology and cell biology, with research focused on the molecular mechanisms involved in ovarian cancer progression. (mint)
Stepping Away From Social Media
In May 2024, Buttermore announced she was stepping away from social media to focus on her mental health.

At the time, she explained that anxiety had become extremely difficult to manage, but said her condition improved after taking a break from online platforms. (The Economic Times)
Her final public posts suggested she was focusing on living a quieter and healthier life away from constant social media attention.
Tributes From Fans
After the announcement of her death, messages of support and condolences began appearing across social media platforms.
Many fans remembered her for promoting a balanced and evidence-based approach to fitness and for openly discussing topics such as body image, nutrition, and mental health.
Her death has left many in the online fitness community mourning the loss of a creator who influenced millions of people around the world.