I just ordered 3 tubes of your creme based on my assistant's reccommendation. I am 67 and use anti-ageing facial products. I used and liked Elemis and now am experimenting w/Dr. Denese. How do I use your creme along w/ serum, eye cream and moisturizer? Concerned about brown spots, wrinkles, and serious under-eye circles. Thanks. Brittany says you are the best!!