Once I turned 40, I noticed that my body was taking longer to recover, was sore more often, and I couldn't quite keep up with the demands of training. I'm usually training for a marathon since I have a goal to run one in every state by the time I turn 50. Almost seemed like I was lacking something. I found Peregrune supplements and whether it's a placebo or not, it worked! I I definitely noticed a difference! I felt great and my running feels strong again. Makes sense that runners or endurance athletes would need more of a certain supplement. I like ordering the 3 pack (multivitamin, join support & Omega 3). Use to get it on Amazon, however, they wouldn't have it in stock at times and it is cheaper buying direct from Peregrune.