Green Tea Moisturizer (Replenix Cream Plus) or SPF?

I went to see my dermatologist last week and she suggested that switch my SPF facial creme (Glytone) for Replenix Green Tea moisturiser because the Glytone had been making my skin super shiny. I'm also using high strength Tazorac. She said that the Green Tea moisturiser would act like an SPF...but I find this difficult to believe? Could someone elaborate on this for me? Thanks :)