The bottom line on this one is  there are so many different ingredients in all these products that no one on this earth knows whether these are all truly compatible.  A good rule of thumb is ...... start with the basics (see my article on products) like a cleanser, moisturizer and sunscreen.  Once you have a solid base there, then start to add "repair" products.  But add them one at time at least a week apart so if you have a reaction you will know which product is causing it.

Waiting one to three months is even better before adding a new product.  That gives you some time to tell whether the new product is making a difference for you.  For some products like antioxidants the goal is more to prevent further damage from UV radiation.  For those you may not see a difference but I think they are still worth using.  I hope this helps!   Dr. I