Fitness YouTuber Jeff Nippard’s wife, Stephanie Buttermore, has died. On March 6, 2026, Jeff Nippard’s team issued a statement on Instagram, announcing Stephanie Buttermore’s death at the age of 36. While the cause of death had not been disclosed, the internet personality’s team pleaded with the online community to respect their privacy.
The Instagram update reads:
“An important update from the Jeff Nippard team: It is with profound sorrow that we share the sudden passing of Jeff’s fiancée and partner of ten years, Stephanie. As many of you know, Stephanie meant the world to Jeff. She will be remembered for her warmth and compassion, her love for her family, and her PhD research on ovarian cancer. We kindly ask for privacy as we navigate this tragic loss. Thank you for your understanding and support during this difficult time.”
Hundreds of netizens on X have expressed their condolences.
“That is devastatingly sad. May she rest in peace. 🕊️” Streamer Fousey wrote.
“I literally just checked her YouTube last week to see if she came back from her break. This f**king sucks so bad” Streamer Macaiyla posted.
“Really sad to hear this. Stephanie always seemed like such a positive presence around Jeff’s content. Wishing him strength during this incredibly tough time” X user @GrizemanI commented.
“This is absolutely heartbreaking 💔. Stephanie Buttermore was such an intelligent, genuine voice in the fitness + science space—her work on recovery, intuitive eating, and just being so open about the mental side of training helped so many people (myself included). 36 is way too young, and seeing Jeff share that news… man, you can feel how devastated he is. They seemed like one of the most solid, real couples in the online fitness world.” X user @UnitedCore6323 stated.
What research did Stephanie Buttermore conduct?
According to Stephanie Buttermore’s official website, her doctoral research focused on early detection screening markers and the mechanisms that drive ovarian cancer. Her research led to the discovery of a protein called Receptor for Hyaluronan Mediated Motility (RHAMM), which was found in ovarian cancer cell lines, tissue, and patient urine.
Her doctoral dissertation is publicly available.
Furthermore, Buttermore had a significant following on social media, boasting over 525k followers on Instagram and more than 1.17 million subscribers on YouTube.
Edited by Aarnesh Shrivastava
