best anti aging cream for young(ish) skin

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I'm 25 and I don't have any wrinkles to reduce the appearance of, but I'd rather like to reduce my chances of getting them in future! What's a good cream aimed at preventing, rather than treating, wrinkles? Nivea Young Skin is clearly aimed at teenagers, but I'm sure I've seen suitable ones advertised in the past. what do you think about Olay Total effects?