Every nail bed has ridges that match up with those inside the nail plate it’s connected to. These ridges support a strong bond. “Our bodies are wise, so whenever we’re small in vitamins and minerals, our nails and hair will demonstrate it,” points out Norris. Nail most cancers (subungual melanoma): https://reidxtxyy.wikievia.com/11079319/facts_about_nail_care_pen_zdf_revealed