This invention provides novel peptides that ameliorate one or more symptoms of atherosclerosis. In certain embodiments, the peptides comprise an 18 amino acid class A amphipathic helix with protecting groups on the amino and the carboxyl terminus. The peptides are highly stable, readily administered via an oral route, and effective to stimulate the formation and cycling of pre-beta high density lipoprotein-like particles, and/or to promote lipid transport and detoxification. When administered with a statin, the peptides enhance the activity of the statin permitting the statin to be used at significantly lower dosages and/or cause the statins to be significantly more anti-inflammatory at any given dose.