1.   The answer to that may be that lowering cholesterol influences the level of serotonin, a neurotransmitter which affects mood.

2.   But generally, studies have shown that lowering cholesterol can lower risk.

3.   For the first time, a study has found that lowering cholesterol not only reduces the risk of heart attack but also saves lives.

4.   Doctors also were dubious at first because they had no proof that lowering cholesterol with statins actually saves lives.

5.   Lowering cholesterol has long been considered a way to stave off heart disease.