Nails WisdomCard

Our Guides and Physician Review team have organized the Top 10 Health Resources on Nails and compiled helpful research notes below.


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Research Notes on Nails


Fingernails and toenails are made of a tough protein called keratin.1 They are a specialized form of skin. They protect the ends of the fingers and toes. Nails are subject to a lot of abuse. Minor nail problems usually heal as the nail grows out and require little treatment.2

Fast Facts:

  • Nails grow at an average rate of 3 millimeters a month.1
  • Fingernails require 3 to 6 months to regrow completely, and toenails require 12 to 18 months.1
  • Nails provide clues to your overall health. Broken, discolored or misshapen nails can indicate nutritional deficiencies, infections or skin conditions.2

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Latest Headlines on Nails

What is the Anatomy of the Nails?

What is the Histology of the Nails?

What is the Physiology and Function of the Nails?

Selected Conditions and Disorders Affecting the Nails

Wisdom, Blogs, and Message Boards about Nails

Foundations and Support Groups on Nails

Scientific and Medical Journal Articles on Nails

Clinical Trials on Nails


Research Notes References

  1. 1.0 1.1 1.2 Wikipedia: Nails Facts
  2. 2.0 2.1 Palo Alto Medical Foundation: Nails

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