There are several FDA-approved nasal sprays that deliver peptides such as oxytocin and desmopressin, and even small proteins like insulin and glucagon [27, 28, 29, 30]
For example, someone looking to boost energy levels or recover from a chronic condition may require more frequent sessions initially, with the frequency gradually reduced as the bodys health improves
"Improving Biological Age, Telomere Length, and Cognition: A Case Report." Restorative Medicine
J Diabetes Complicat 30(4):723727 Ahmadian F, Mozaffari-Khosravi H, Azaraein MH, Faraji R, Zavar-Reza J (2017) The effect of consumption of garlic tablet on proteins oxidation biomarkers in postmenopausal osteoporotic women: a randomized clinical trial
Also, If you have an allergic reaction that causes swelling in your face, mouth, or tongue, seek immediate medical attention
GHK-Cu was discussed in FDA compounding-related contexts