Maintain a healthy diet.
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Generally speaking, healthy skin translates into healthy hair, and a beard is no different. So, in addition to eating well (which includes limiting alcohol and avoiding dehydration), taking a multivitamin and omega-3 fatty acids will help dramatically improve your skin and thus the whiskers sprouting out of it.

Jack Passion of 'Whisker Wars,' the brash owner of a mighty, belt-length ginger mane of the sort that scares children and old ladies, even suggests a particular dietary supplement that is rich in hair-healthy beta carotene (vitamin A).