Health indicators through your nails

What Are Your Nails Telling You About Your Health?

What are your nails indicating about your health? Nails are composed mainly of keratin, a type of protein. Healthy nails are light pink, indicating a rich blood supply. Nutritional deficiencies often show up in changes or abnormalities of the nails.


  • Hangnails are often caused by a lack of protein
  • White bands across the nails are an indication of protein deficiency
  • Dry nails can mean an insufficient intake of vitamin B12
  • Spoon nails (nails that develop in a concave shape), fragility or vertical ridges are caused by a deficiency of Vitamin B12
  • White spots indicate a zinc deficiency
  • Brittle nails may be indicative of circulatory problems, iron deficiency, impaired kidney function or thyroid problems
  • Chipped, cracked, easily broken or peeled nails may be indicative of a nutritional deficiency such as minerals, protein or insufficient amounts of hydrochloric acid
  • Dark nails may be indicative of a Vitamin B12 deficiency, may also indicate anemia
  • Deep blue nails may indicate a pulmonary obstruction such as asthma or emphysema
  • A downward curvature of the nail may be indicative of heart, liver or respiratory disorders
  • Frayed nails or split ends could indicate psoriasis or a folic acid, protein and/or Vitamin C deficiency
  • Ridges up and down the nail may be indicative of developing arthritis
  • Nails that are separate from the nail-bed could indicate a thyroid condition
  • White lines across the nails may be indicative of liver disease or a condition of the liver
  • White nails may be indicative of possible kidney or liver dysfunction, may also indicate anemia
  • Yellow nails (if not caused from smoking) may be indicative of internal disorders long before symptoms show up elsewhere in the body (diabetes, liver, lymphatic or respiratory conditions)
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