While water is the only solution for staying hydrated from the inside out (supplemented by Lucozade as needed, should you find yourself suffering from a temporary condition that can only be cured by Berocca and a bacon, egg, and cheese), it is wrong to portray it as the only route to dewy, gallon-a-day skin. That's where a hydrating serum comes in.
Ahead, find our pick of the best.
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