Peptide hormones are made up of amino acids, while steroid hormones are derived from cholesterol. There are many types of peptide hormones with wide-ranging effects including increasing energy, boosting the immune system, burning fat, and building muscle. Insulin, oxytocin, sermorelin and growth hormone are examples of well known peptide hormones. At Cheung Aesthetics & Wellness, we recommend peptides to slow down immunosenescence and aging, and to decrease inflammation.