Thanks for your question - here are a few links to our information that I think will be very helpful to you. 

The first is to our Basics of Cholesterol Section.  As well you should read about Crestor and the various aspects of this drug:

Rosuvastatin is an enzyme blocker (HMG-CoA reductase inhibitor), also known as a "statin." It is used along with a proper diet to help lower fats (triglycerides) and cholesterol in the blood. This drug is usually prescribed after non-drug treatment options have not been fully successful at lowering cholesterol (e.g., diet change, increase in exercise, weight loss if overweight). Reducing cholesterol and triglycerides help prevent strokes and heart attacks.

Finally, you should review the Lifestyle Changes for Cholesterol and Low Cholesterol Diets sections.

Hope this helps, all the best, sue