Sunday Riley Luna Sleeping Night Oil

Not too long ago, Sephora offered a five-use sample of Sunday Riley Luna Sleeping Night Oil ($105) for selection in a customer's three free samples. I was intrigued, but I saw that it contained "the next generation retinoid oil." That concerned me, given the terrible reactions I've had to retinol in the past. My dermatologist advised me to avoid it - forever.

Then, a couple of years ago, Le