Back in 2003 I went through 2 knee surgeries. I needed to take every advantage I could to return to NHL and compete at that level. Through hard work during the off-season and the help of SierraSil® I have not missed a game in 2 years. I recover much faster between games and my knee does not ache as it used to. I completely recommend this product. SierraSil makes a difference, no question about it."