GHK CU, Why this audio? Because injecting feels like a constant wasp sting so it takes me about 15 seconds to pin .2 mL. I dread this shot every night for that reason. Also, it leaves me bruised, so I Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu Can I use Retinoids with Vitali GHK Cu Copper Peptides? How do I get t Vitali Skincare If youre using GHK Cu and it stings a little (which is common) this ones for you , In this reel Im sharing the small tweaks that have helped me make peptide injections way more comfortable