l carnitine powder vs injection L-Carnitine Injections for Fat Loss – Benefits & Uses ORAL VS. INJECTABLE L-CARNITINE ,
Description
Effects of topical creams containing vitamin C, a copper-binding peptide cream and melatonin compared with tretinoin on the ultrastructure of normal skinA pilot clinical, histologic, and ultrastructural study
Avoid squirting directly onto the powder

doi:10.1124/pr.115.011395

The consensus is that GHK-Cu can enhance results, but it usually complements other therapies (like vitamin supplementation, topical agents, or healthy lifestyle) rather than serving as a standalone fix

It's a catastrophic failure point in the research process