Yes, GHK-Cu can be used with many other active ingredients, but some combinations should be approached with caution
Kojic Acid Dipalmitate :Anatural ingredient derived either from mushrooms or fermentation process of Japanese rice, often used in skin care products as a activeagent for skin tone related issues

Major Ingredients Water, Triethylhexanoin, Hydrogenated Poly(C6-14 Olefin), Butylene Glycol, Niacinamide, Methylpropanediol, 1,2-Hexanediol, Phenyl Trimethicone, Diethoxyethyl Succinate, Polyglyceryl-10 Myristate, Borago Officinalis Extract, Centaurea Cyanus Flower Extract, Chamomilla Recutita (Matricaria) Flower/Leaf Extract, Lavandula Angustifolia (Lavender) Flower Water, Hyacinthus Orientalis (Hyacinth) Extract, Salvia Sclarea (Clary) Extract, Ethylhexylglycerin, Hibiscus Esculentus Fruit Extract, Corchorus Olitorius Leaf Extract, Carum Petroselinum (Parsley) Extract, Hexyl Cinnamal, Limonene, Linalool, Fragrance, Hippophae Rhamnoides Oil, Allantoin, Hydrogenated Lecithin, Sodium Gluconate, Glutathione, Adenosine, Cellulose Gum, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Curcuma Longa (Turmeric) Root Extract, Ocimum Sanctum Leaf Extract, Corallina Officinalis Extract, Biotin, Biotinoyl Tripeptide-1, Acetyl Hexapeptide-8, Tripeptide-1, Tripeptide-3, Myristoyl Pentapeptide-17, Hexapeptide-9, Gluconolactone, Alpha-Arbutin, Thioctic Acid Ingredients subject to change at manufacturer's discretion

It's a cleanser infused with glutathione for brightening and antioxidant benefits
But it is impossible to say which patients and what dosage that would be unless one is the prescribing clinician. Desoxyn tablets come in standard doses of 5 milligrams and can be multiplied if considered necessary by a doctor or other healthcare professional
10.1007/s00284-017-1256-4 39 HaghdoostM.TaghizadehS.MontazerM.PoorshahverdiP.RamouzA.FakourS