For over a decade, Ruth has written for multiple outlets providing patient education, including Health. She has written for health student education companies, collaborating on an anatomy textbook ...

This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...

Magnesium deficiency can lead to symptoms such as eye twitching, numbness of the face, or jaw tension. A deficiency might also lead to darker under-eye circles and poorer overall skin tone. Many other ...