- Question: I want to purchase the pca exlinea peptide. I’m wondering when to use it. In the morning I use a vitamin c serum from Renee rouleau. In the evening, I use skinceuticals retinol cream every other night and on the nights I don’t use retinol, I use an exfoliating serum. Please advice.
Thank you for reaching out to us. I would recommend that you interchange with your night time products, this product only goes on areas of concern so you could apply either of your other products on the areas that you are not applying your PCA product as well if you wanted to.
I hope this helps, have a nice day !