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Respiratory and Lung Tissue COPD research demonstrates GHK-Cu restores lung fibroblast function at nanomolar concentrations

The mechanism differentiates it from general GH-axis stimulation

If these symptoms last longer than a few days contact your doctor right away

### Regulatory Status and Availability **AOD-9604:** - Never received FDA approval for any indication - Classified by the FDA as a **Category 2 bulk drug substance** not eligible for compounding under Section 503B - Removed from many international peptide supplier platforms (including Alibaba and related marketplaces) - Legal status varies by country

If you are pregnant, breastfeeding, or have specific medical concernssuch as kidney disease, low potassium levels, or certain blood disordersplease mention these during your consultation

How Often Do You Need a Vitamin B12 Injection