- Question: I started using PCA Ex Linea serum as suggested by you. I noticed from reading the blog that you recommend other products for this issue. I have several questions. I'm thinking of adding Sunday Riley's Original Good Genes Lactic Acid. Should this product be used with PCA & should I still use a Retina-A? If so, how do I use PCA Ex Linea, Retina-A & Lactic Acid? Should I continue to use PCA's collagen cream as last step?
Thank you for reaching out to us. In answer to your question I would interhange all three products , you can use the Good Genes and PCA during the day or night . Retin- A only at night and most definitely follow with your moisturizer on all products.
I hope this helps, have a nice day !