How to lower your cholestorol and declog your arteries

I was reading a miracle cure when I came accross some important information that can change peoples life. This certain natural substance has no side affects, at least that is what I read, and can be taken with water. The book told a story about a 70 year old man who reduced his arterie build up from 75% to 25% in 18 monthes his cholesterol was greatly reduced too. The natural substance is grapefruit fiber and is found at any health food store or the internet. I don't know if it would work but you should research more on the stuff.