Question: What is the best treatment serum for Post inflammatory hyperpigmentation from old acne scars that are red/pink?

Thank you for reaching out to us. I would recommend the brand iS Clinical , their Super Serum Advance Plus will help with your skincare concerns. Make sure you are following with a sunscreen. Their Eclipse SPF 50 Plus. I hope this helps, have a nice day !Cyndee Dermstore Esthetician