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Evaluation of Vitamin D Status in the Green Iguana (Iguana iguana): Oral Administration vs UVB Exposure

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Abstract

Vitamin D is scarce in most foods, and technically is not a nutrient, but a hormone. Our ancestors obtained sufficient exposure of their skin to solar ultraviolet radiation B, 390-320 nm, (UV-B), the wavelengths that permit conversion of pre-vitamin D to vitamin D, to satisfy their requirements for vitamin D. In the United States, milk is fortified with vitamin D to assure adequate intakes, particularly since many believe that avoidance of the sun is an important safeguard against skin cancer. While estimates of dietary requirements for humans appear rational, we know very little about effective and safe levels of vitamin D for reptiles (1). This is a critical issue since both deficiency and toxicity can produce abnormal calcium and phosphorus metabolic responses. Long term feeding of vitamin D at 4,000 IU per kg of diet will produce signs of toxicity in some domestic animals (2).

Keywords

  • Oral Vitamin
  • Solar Ultraviolet Radiation
  • Artificial Source
  • Green Iguana
  • Iguana Iguana

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bernard, J.B., 1995. Spectral Irradiance of Fluorescent Lamps and Their Efficacy for Promoting Vitamin D Synthesis in Herbivorous Reptiles, Ph.D. Dissertation, Michigan State University, E. Lansing, MI.

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  2. National Research Council. 1987. Vitamin Tolerance of Animals. National Academy of Sciences, Washington.

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  3. Chen, T.C. A.K. Turner and M.F. Holick. 1990. J. Nutr. Biochem. 1:315–319.

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© 1999 Springer Science+Business Media New York

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Allen, M.E., Chen, T.C., Holick, M.F., Merkel, E. (1999). Evaluation of Vitamin D Status in the Green Iguana (Iguana iguana): Oral Administration vs UVB Exposure. In: Holick, M.F., Jung, E.G. (eds) Biologic Effects of Light 1998. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5051-8_17

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  • DOI: https://doi.org/10.1007/978-1-4615-5051-8_17

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-7296-7

  • Online ISBN: 978-1-4615-5051-8

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