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Q: Does having bent or brittle nails mean I have a nutritional deficiency?


Issues with the health of your nails can be from nutritional deficiency, nutritional toxicity or other causes (such as liver disease and chronic kidney disease).

Nutritional deficiency:

  1. Long standing iron deficiency can result in spoon-shaped nails (koilonychia). Recommended dietary intake (RDI) is 8-18ug/day.

  2. Vitamin B12 deficiency has been associated with changes in nail pigments. RDI is 2.4ug/day.

  3. Protein deficiency or protein energy malnutrition can result with transverse ridges on nails. RDI is 0.75-0.84g/kg body weight. Recent studies have recommended higher intakes of 1.0-1.2g/kg body weight for elderly (65yo+).

  4. Selenium deficiency can result in white fingernail beds. RDI is 60-70ug/day.

Nutritional toxicity:

  1. Vitamin A toxicity can result in nail brittleness such as above 20,000ug/day. RDI is 700-900ug/day.

  2. Selenium toxicity can result in nail brittleness, nail discolouration and nail loss such as above 850ug/day.

If you are experiencing these symptoms see a healthcare professional and conduct tests such as blood tests to determine whether you are deficient. Supplement only if necessary as excess vitamins/minerals can be toxic! It’s best to obtain nutrients from a balanced diet. See a dietitian to ensure you are eating healthily every day!

Source:

https://www.ncbi.nlm.nih.gov/pubmed/23867520

https://www.ncbi.nlm.nih.gov/pubmed/19888943

http://www.pennutrition.com/KnowledgePathway.aspx?kpid=6751&pqcatid=146&pqid=6767

https://www.ncbi.nlm.nih.gov/pubmed/22534387

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  • Rebecca Luong

Q: Does having bent or brittle nails mean I have a nutritional deficiency?


Issues with the health of your nails can be from nutritional deficiency, nutritional toxicity or other causes (such as liver disease and chronic kidney disease).

Nutritional deficiency:

  1. Long standing iron deficiency can result in spoon-shaped nails (koilonychia). Recommended dietary intake (RDI) is 8-18ug/day.

  2. Vitamin B12 deficiency has been associated with changes in nail pigments. RDI is 2.4ug/day.

  3. Protein deficiency or protein energy malnutrition can result with transverse ridges on nails. RDI is 0.75-0.84g/kg body weight. Recent studies have recommended higher intakes of 1.0-1.2g/kg body weight for elderly (65yo+).

  4. Selenium deficiency can result in white fingernail beds. RDI is 60-70ug/day.

Nutritional toxicity:

  1. Vitamin A toxicity can result in nail brittleness such as above 20,000ug/day. RDI is 700-900ug/day.

  2. Selenium toxicity can result in nail brittleness, nail discolouration and nail loss such as above 850ug/day.

If you are experiencing these symptoms see a healthcare professional and conduct tests such as blood tests to determine whether you are deficient. Supplement only if necessary as excess vitamins/minerals can be toxic! It’s best to obtain nutrients from a balanced diet. See a dietitian to ensure you are eating healthily every day!

Source:

https://www.ncbi.nlm.nih.gov/pubmed/23867520

https://www.ncbi.nlm.nih.gov/pubmed/19888943

http://www.pennutrition.com/KnowledgePathway.aspx?kpid=6751&pqcatid=146&pqid=6767

https://www.ncbi.nlm.nih.gov/pubmed/22534387

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