If every anti-aging product on the market really did what it claimed, we'd all look 18. And while there are many effective products that help make the most of our looks as we age (and I, for one, like the way I look better at 45 than I did at 18), there are also many that are nothing but snake oil. Thus, I've created this series, Spend or Skip?, in which I will apply my twenty years as a beauty guinea pig to objectively road-test and review buzz-generating, anti-aging products that everyone's talking about. The mission: to help you decide whether to buy—or bypass—the latest fountain of youth.