Jeff Nippard -- a popular bodybuilder and fitness influencer -- has suffered a major loss ... his fiancée has died.
Nippard's team broke the bad news Friday, issuing a statement on Instagram about the passing of Stephanie Buttermore. Her cause of death was not released.
The statement touches on Nippard's 10-year relationship with Buttermore, who "meant the world to Jeff." It also honors Buttermore's legacy of "warmth and compassion, her love for her family, and her PhD research on ovarian cancer.