While Lentini admits sales have picked up, he says he's been hurt by the perception in the recent baseball letter, which told players that deer antler velvet could be contaminated with methyltestosterone, a banned steroid. The connection is based on the fact that David Vobora tested positive for the steroid after using antler spray. He won a $5.4 million judgment against the company that made the spray.
One study published in the Journal of Ethnopharmacology found evidence that use of deer velvet antler may help strengthen joints and bones, reducing symptoms like joint pain associated with osteoarthritis. (10) After rats with osteoarthritic symptoms were given total velvet antler polypeptides from red deer (TVAPL) for 12 weeks, they showed signs of significant reversal in osteoporosis. The researchers found improvements in the rats’ bone weight coefficient (BWC), bone mineral density (BMD), and bone mineral content (BMC). They believe these effects were due to proliferation of cartilage and osteoblast-like cells, in addition to reductions in inflammation due to inhibition of interleukin-1 (IL-1).