I've been taking this Cardio For Life for awhile I love it. 'll show you exactly what it is I did and share how it can revitalize your life. This was recommended by our doctor. Cardio For Life was suggested for more energy and vitality. After using Cardio For Life for several years and have seen great improvement. Would not live without it. Also has kept us "regular" (TMI) believe it or not!! Very good side benefit!! Also Cardio For Life gives me a lot of energy. So much that I have to use this every other day. Great product. Don't be fooled into thinking that a cheap L-arginine product will do the job.