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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

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

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