The safety of GHK-Cu during pregnancy and breastfeeding has not been established due to limited data
1 H NMR (400 MHz, DMSO) 8.96 (s, 2H), 8.83 8.63 (m, 2H), 8.44 (dd, J = 23.9, 7.0 Hz, 1H), 8.36 8.24 (m, 2H), 8.02 (s, 4H), 7.82 (s, 3H), 7.39 7.28 (m, 2H), 4.76 (tt, J = 16.1, 8.0 Hz, 2H), 4.37 4.24 (m, 1H), 4.15 (d, J = 9.7 Hz, 2H), 3.38 (q, J = 7.0 Hz, 4H), 3.13 2.87 (m, 6H), 2.74 (s, 4H), 1.75 1.13 (m, 18H), 1.09 (t, J = 7.0 Hz, 5H)
This protects the peptide from foaming and shear
Common side effects Injection-site reactions: mild redness, tenderness, swelling, occasional bruising - usually resolve within hours Skin flushing / warmth - brief, related to vasodilation Transient fatigue in the first 12 weeks of intensive protocols Mild headache - usually dose-related Higher-dose theoretical concerns Copper accumulation - each 2 mg injection adds roughly 0.03 mg of elemental copper, trivial next to the 0.92.2 mg from a normal diet
J Clin Lab Anal