5 Health Truths Hidden in Your Fingernails

Not just for scratching, and not just for painting—turns out, your fingernails can be a window into your health! Join Hank Green for a new episode of SciShow where he'll explain just what hidden health truths can be revealed by your fingernails! Let's go!
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Sources:
https://www.aad.org/dermatology-a-to-...
http://health.clevelandclinic.org/201...
http://www.ncbi.nlm.nih.gov/pmc/artic...
https://books.google.com/books?id=ekr...
http://www.nhlbi.nih.gov/health/healt...
http://www.nhs.uk/conditions/Fungal-n...
http://www.aafp.org/afp/2004/0315/p14...

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