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Every cell requires zinc in order to reproduce, you couldn't have been born without it. Zinc boosts brain activity, and is an essential trace element for humans, but it requires a delicate balance, being toxic in higher quantities. It is a component to sunblock, but can also protect skin against windburn and other irritations. Readers will explore every aspect of zinc, from how it contributes to health even prior to birth, to how it's inside every penny we spend.