to protect your skin. at night, you apply the nighttime renewal complex to clean the skin. just a pea-sized amount is enough for your face and neck, and you'll wake up to younger-looking skin. it's a difference people will notice. >> i started noticing a difference after probably three weeks in the clarity, the brightness, and the wrinkles. people started commenting that i looked really rested and refreshed, and i really, really do believe in it. >> so, what exactly is the special delivery system that's the real secret to natural advantage? i asked dermatologist dr. joel cohen to explain how it works. >> topical formulations that are applied to the skin to improve texture and color and tone of the skin, it's important that you have adequate amount of material that's applied to the skin to do something. so, having a delivery system that incorporates a microsponge delayed delivery system, where some amount of product is delivered, and then,