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inject slowly and steadily [11]

Acknowledgments The authors sincerely thank the Department of Product Evaluation (Shanghai Jiyan Biomedical Development Co., Ltd.) for their technical support in skin experiments

To improve delivery, some formulations use: Liposomes (encapsulation that may improve penetration) Microneedling or microneedle patches (temporary micro-channels for deeper delivery) Injectable GHK-Cu bypasses the skin barrier and delivers the peptide directly to deeper layers

However, there is no need for the lengthy recovery associated with traditional liposuction surgery

This FDA list, known as the bulks list, is at the center of the ongoing peptide debate

doi: 10.1136/bmj.328.7438.514 205