Thank you for the question. You may certainly start with the Advanced Anti-Ageing Cell Repair Serum with your regular products. It should be applied after the Cleanser and Toner and left on. It is a unique product because as it contains all 3 Polipeptides which successfully penetrate the collagen deeper to stimulate renewal. It should also be applied 2x per day. To truly evaluate a product it should preferably be used with the balance in the range, but maybe when you have finished them, we can advise what else to apply. It will also add value at 60.