glutathione and biotin together RediClinic Skin Care Supplement Combo with Capsules | Collagen, Keratin & Vitamin C Mulitte Biotin + Collagen Capsules

Topical application of GHK-Biotin is not an attempt to override the body's natural processes it is a means of replenishing a molecule that the body itself once produced in abundance, delivered precisely where it is needed, at the tissue level, bypassing the absorption and bioavailability challenges inherent in oral supplementation

2012 Mar;17(3):290-314

Injectable GHK-Cu is another

Reconstitution formula: 30mg / water volume (mL) = concentration (mg/mL) Unit formula: Desired dose (mg) / concentration per unit (mg) = units to draw Most common setup: 3.0 mL water into 30mg vial = 10 mg/mL Quick dosing at 10 mg/mL: 2.5mg = 25 units 5mg = 50 units 7.5mg = 75 units 10mg = 100 units Injection: Subcutaneous