I saw an advertisement online for a nitric oxide muscle building product called Force Factor. It caught my attention because it was endorsed by professional athletes like the Chicago Bulls' Derrick Rose and Vernon Davis of the San Franciso 49ers. There was a promotion to received a FREE sample of Force Factor and I reluctantly signed up. I don't usually do things like this but I thought it seemed legitimate. I received my FREE sample very fast and tried the product over the next couple weeks (although honestly I felt no difference... read full review »