It depends on your dose and how you change your diet. With doses of 5 mg, 10 mg, 20 mg, and 40 mg daily Crestor
by 45%, 52%, 55%, and 63%, respectively. Additional studies down with the 5mg and 10mg show results that are pretty close to the ones claimed by the manufacture. It also lowers lower triglycerides by 21- 43%.
It is important that you eat a healthy diet in addition to taking your medication to get the maximum effect.