Our peppermint scented soap is shocked full of 900 mgs. of caffeine anhydrous, giving you the ultimate, legal-limit caffeine rush. This all natural “power bar” invigorates your senses, while boosting your energy level. Nature’s Rx: Peppermint essential oil in its own right is revered for its invigorating properties. Caffeine has many therapeutic skin rejuvenation properties, in addition to its ability to be transdermally absorbed for an instant burst of energy.