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 Amazon.com: Glutathion EZ Edible Flim Type Glutathione, Collagen, Elastin, Hyaluronic Acid, Vitamin C *As Advertised* 270mg x 30 Films (8.1g) : Health & Household Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum Biossance [Abib] 1+1 Glow Collagen Mask Glutathione Film (4ea)