Hi wise mumsnetters. I can't find the answer to this anywhere! I know we are supposed to use SPF every day but does that have to be a standalone product ? I know some moisturisers with added spf aren't enough but the Cereve one seems to be marketed as an SPF product so is it enough ? I use serum, moisturiser and make up so not sure where I'd fit in extra spf or indeed at what stage to use it. Thank you