I think you're correct. Vichy products are good -- but look at the ingredient list and see how far the retinol and Vit C are separated. Personally I'd use Vit C in the morning and retinol at night.If I am not mistaken, isn't vitamin c and retinol have to be applied separately to the skin?? I mean from what I've read, vitamin c is supposed to be used in the morning and retinol at night?? Can someone please shed some light on this? would really appreciate.