Standard reconstitution (most common) Add 2ml of bacteriostatic water to 5mg vial This creates: 2,500mcg per ml (2.5mcg per unit on insulin syringe) Easy math : 250mcg dose = 0.10ml = 10 units on syringe 350mcg dose = 0.14ml = 14 units 500mcg dose = 0.20ml = 20 units Most people prefer this concentration for easy dosing
Even though impairment of BDNF expression within the CA3 did not affect any of the tested behaviors, previous studies indicated that BDNF mRNA levels within the CA3 were increased by the antidepressant treatments
Some sources report stability for up to 56 days, but 28 days is a safe guideline
Y.et al (2022a)
If you have a known copper allergy (sometimes identified through reactions to copper jewelry), patch test any GHK-Cu product on your inner forearm for 48 hours before applying it to your face

Visibly Youthful Skin: Collagen enhances the look and feel of your skin, hair, and nails, helping to hydrate and reduce fine lines and wrinkles, with added nutrients for cellular repair* Easy to Absorb: Provides 15 g of hormone-free collagen types I and III, which have been broken down into shorter amino acid chains, called peptides, that are easier to digest Natural Ceramides: White peach ceramides along with red and black currant extracts support hydration, elasticity, and strength of skin in as little as 4 weeks* Third-Party Certified: This product has been third-party tested and certified to verify what's in the package matches what's on the label and to confirm it contains no unsafe levels of contaminants Trusted: Thorne is trusted by 100+ professional sports teams and the #1 most recommended clinical brand by consumers and health-care practitioners (Based on a 2026 independent survey of US supplement consumers and health-care practitioners)