Once it's mixed, it belongs in the refrigeratorpromptly
Small 8:20282035 Sun J, Yue Y, Wang P, He H, Jin Y (2013) Facile and rapid synthesis of water-soluble fluorescent gold nanoclusters for sensitive and selective detection of Ag +
A Drosophila derailed homolog, Doughnut, expressed in invaginating cells during embryogenesis

Here is an honest summary of what you can and cannot expect: What You CAN Realistically Expect Measurably softer, smoother skin texture within 34 weeks Visible reduction in fine lines, especially around the eyes, by weeks 48 Significantly firmer, more lifted-feeling skin by weeks 812 Reduced redness and improved skin tone uniformity from early weeks Improved healing of acne scarring, post-procedure recovery, and damaged skin A progressive, compounding improvement that continues building over months Hair thickness improvements with consistent scalp application over 812 weeks What You Should NOT Expect Dramatic wrinkle erasure in 12 weeks (those claims involve misleading photography or film-forming agents) Botox-equivalent muscle relaxation (GHK-Cu doesn't inhibit neurotransmitters that's Argireline/SNAP-8's role) Permanent results without ongoing use like all biological interventions, maintenance is required Identical results to someone else skin type, age, damage severity, and application consistency all affect outcomes GHK-Cu's results are directly proportional to consistency

But for women, a combination of biological, hormonal and anatomical factors stacks the risk higher still, writes Adam Taylor, Lancaster University and Michelle Swainson, Lancaster University in this article republished from The Conversation
For a 1mg dose with the same concentration: 1mg divided by 25mg per ml equals 0.04ml or 4 units