Currently, one study that induced a fracture unto a rat bone and injected 20mg/kg of Velvet Antler polypeptides into the area every other day for 7 weeks noted that fracture healing rate was dose-dependently increased at weeks 4-7 relative to control and that the bone loading weight was increased following rehabilitation with 10mg/kg (60.7%) and 20mg/kg (93% more than control) after 7 weeks.[29] An in vitro study suggested that this was due to a concentration-dependent mitogenic activity on osteoblastic precursors and chondrocytes.[29]
A systemic review on human interventions[25] makes note of a study conducted on patients of osteoarthritis (Edelman et al. 2000; cannot be located online) which found improvements in joint pain symptoms relative to baseline in the Velvet Antler group and not placebo, although a lack of information on blinding and randomization precludes results that can be drawn from this study.