This invention provides novel peptides that ameliorate one or more symptoms of atherosclerosis. The peptides are highly stable and readily administered via an oral route. In addition, the peptides inhibit osteoporosis. When administered with a statin, the peptides enhance the activity of the statin permitting the statin to be used at significantly lower dosages. In certain embodiments, the peptides range in length from about 10 up to about 30 amino acids, comprise at least one class A amphipathic helix, and protect a phospholipid against oxidation by an oxidizing agent.