Karen Cunningham is a 65 year old medical transcriptionist from Hanover, Michigan. Here’s what Karen has to say about Corduzin: "I decided to to try Corduzin because one of my hobbies for many years has been recreational running and I had been suffering from fatigue after only a few miles. With this supplement I noticed a definitive improvement in my endurance.* I increased my mileage during the summer because my running had significantly improved, going on to run a half marathon in August, and last October ran a full marathon two days before my 64th birthday."