I am 46 years old. I stumbled onto a Blake Sawyer interview and heard he used Royal Velvet Deer Antler Spray. I ordered it and was glad I did. I ordered Royal Velvet from the Healthy Protocol website and it arrived in 2 days by Priority mail. Here are the changes I noticed so far while still on my first bottle of Royal Velvet. When I was younger, I was a track and field athlete, soccer and cricket player. For the last 20 + year, I have suffered from stiffness in my knees, hips and lower back. Within 48 hours of using Royal Velvet, the stiffness disappeared. It is like having a lube job on my joints. I have more flexibility and no stiffness when I run, bend etc. I can now run and play with my 8 year old daughter. It is the most obvious benefit so far of using Royal Velvet. I am sold on Royal Velvet Deer Antler Spray. I glad I gave it a chance.