OCIA checks out some of Xoxide's Caffeinated Soap in their latest review.

Now it seems as though the soap is not infused with caffeine in the same manner as coffee. The soap has countless little brown/dark yellow flakes throughout that come off as you wash. Given the surface area of the skin, and the fact that these flakes come off during washing, the claimed dosage of approximately 250mg of caffeine per serving is entirely feasible.

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