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Vitamin D produced in pig skin by 296 nmeter UV-LEDs – May 2016

Investigation of the effect of UV-LED exposure conditions on the production of vitamin D in pig skin

Food Chemistry, Available online 24 May 2016, doi:10.1016/j.foodchem.2016.05.155
Line Lundb?k Barnkoba, Aikaterini Argyrakib, Paul Michael Petersenb, Jette Jakobsena, ,

VitaminDWiki Summary
  • They want to increase vitamin D in meat products, but were restricted by how much vitamin D can be added to animal feed and did not consider having the animals outdoors.
  • They tested Vitamin D production in dead pig skin
  • 296 nanometer wavelength UV LEDs produced the most Vitamin D (no surprise)
    much better than 292 nm and 300 nm
  • No attempt was made to pulse the UV-LEDs so as to increase peak intensity and skin depth
    Note: VitaminDWiki has had excellent success with pulsing IR LEDs for LLLT
  • LEDs were purchased from http://www.s-et.com/
  • Opinion: This does not appear to be a very cost effective way to increase Vitamin D levels in meat
    Far better to put some other forms of vitamin D into the animal feed which are not regulated

See also VitaminDWiki

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The dietary intake of vitamin D is currently below the recommended intake of 10-20 μg vitamin D/day. Foods with increased content of vitamin D or new products with enhanced vitamin D are warranted. Light-emitting diodes (LEDs) are a potential new resource in food production lines. In the present study the exposure conditions with ultraviolet (UV) LEDs were systematically investigated in the wavelength range 280-340 nm for achieving optimal vitamin D bio-fortification in pig skin. A wavelength of 296 nm was found to be optimal for vitamin D3 production. The maximum dose of 20 kJ/m2 produced 3.5-4 μg vitamin D3/cm2 pig skin. Vitamin D3 produced was independent on the combination of time and intensity of the LED source. The increased UV exposure by UV-LEDs may be readily implemented in existing food production facilities, without major modifications to the process or processing equipment, for bio-fortifying food products containing pork skin.

Publisher wants $35 for the PDF
LEDs used
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Attached files

ID Name Comment Uploaded Size Downloads
6715 296 nm.jpg admin 31 May, 2016 18.24 Kb 1665
6714 SETI 295.jpg admin 31 May, 2016 33.74 Kb 1450