Many other products containing glucosamine or chondroitin sulfate are made from animal by-products such as shark cartilage, shellfish and bovine cartilage, which involves ending the lives of these animals. Because elk naturally shed and regrow their antlers each year, producing elk velvet antler does not harm any animals. It’s also a 100% renewable resource.While other products can provide some relief for conditions such as arthritis, QEVA contains additional compounds that single trait products lack. The combination of the bioactive compounds contained in QEVA make it a more effective product.