What age should you start using anti-aging products?

Im 31. I normally use an ordinary moisturiser with a sunscreen for day and a vitimin e cream at night. Ive noticeed some fine lines round my eyes and mouth when I smile. Am i too young to use anti ageing creams?
Update: Not convinced by this "your never too young" business - using anti ageing products on young skin SPEEDS UP the ageing process!
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