A tenocyte is the main cell type in tendon tissue (a specialized tendon fibroblast). Tenocytes build and continually rebuild the tendon’s collagen structure, and they change how active they are based on how much load the tendon is carrying — a responsiveness called mechanotransduction.
In lab-dish studies, researchers found BPC-157 changed how tenocytes moved and survived in culture.[1] That kind of finding is an early, preliminary signal — cell-dish behavior is not the same as proof that a compound helps a tendon heal in a living person.
In chronic tendon problems, tenocyte behavior and structure change alongside the collagen disorganization seen in tendinosis. No compound marketed for “tenocyte support” currently has a human trial showing it changes tenocyte behavior in a person — that step from lab dish to human tendon has not been made.