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The key feature of this short peptide is its high concentration of one specific amino acid, proline, that provides an unusual kink in peptides and proteins and may delay or even prevent its degradation
For GHK-Cu FDA approval, pharmaceutical products must meet strict requirements for impurity control throughout the entire shelf life
Second, the jump from 10mg to 15mg is modest
Some experts recommend starting at the lowest available dose (0.25 mg for subcutaneous injection) and extending the dosing interval from weekly to every 10 days or longer, allowing more time for the body to clear the medication
A 10 to 25% discount from market average is normal competitive pricing