Administration methods for peptide products include oral, nasal, injection, and topical. Because peptides are easily broken down by the digestive system, they may be difficult to enter the bloodstream in active form after oral administration, so many therapeutic peptides are administered by injection. To improve the absorption rate of oral peptides, researchers are developing delivery technologies such as polymeric nanoparticles and microneedles. Nasal administration allows peptides to be absorbed through the nasal mucosa and may act on the central nervous system via the nose-to-brain pathway; topical peptides are mainly added to skincare formulations, acting on local tissues.
Christopher Shade, a longevity expert with a PhD in environmental chemistry, states that there is no unified standard for usage duration. Medical professionals typically consider treatment goals, efficacy changes, side effects, and bodily adaptation. During treatment, monitoring may be needed for blood sugar, liver and kidney function, blood pressure, inflammation markers, as well as hormone levels like IGF-1 and thyroid hormones; sometimes special tests such as T-cell receptor excision circles may also be required.
Peptides are not a shortcut to health and cannot replace good lifestyle habits. Cologne emphasizes that if basic health is compromised, peptides will struggle to work. Shade points out that long-term sleep deprivation may damage gut health, increase oxidative stress, and reduce cellular responsiveness to signals, thereby weakening peptide effects; healthy habits like regular exercise may enhance the benefits of certain peptides. With continuous innovation in delivery technologies, peptide products continue to expand in fields such as medicine, skincare, sports recovery, and healthy aging, demonstrating broad application prospects. In the future, more efficient and convenient administration methods are expected to further enhance the application value of peptide products.