UVB Exposure of Farm Animals: Study on a Food-Based Strategy to Bridge the Gap between Current Vitamin D Intakes and Dietary Targets

作者：Schutkowski Alexandra; Kraemer Julia; Kluge Holger; Hirche Frank; Krombholz Andreas; Theumer Torsten; Stangl Gabriele I^*

来源：PLos One, 2013, 8(7): e69418.

DOI：10.1371/journal.pone.0069418

Vitamin D deficiency is a global health problem. This study aimed to investigate the efficacy of ultraviolet (UV) B radiation for improving vitamin D-3 content of eggs and meat. In a two-factorial design hens that received diets with 0 (-D-3) or 3,000 IU (+D-3) vitamin D-3/kg were non-exposed (-UVB) or exposed to UVB radiation (+UVB) for 3 h daily over 4 weeks. Data show that UVB radiation was very effective in raising the vitamin D-3 content of egg yolk and meat. Egg yolk from +UVB/-D-3 hens had a higher vitamin D-3 content (17.5 +/- 7.2 mu g/100 g dry matter (DM)) than those from the -UVB/+D-3 group (5.2 +/- 2.4 mu g/100 g DM, p<0.01). Vitamin D-3 content in egg yolk of vitamin D-3-supplemented hens could be further increased by UVB radiation (32.4 +/- 10.9 mg/100 g DM). The content of 25-hydroxyvitamin D-3 (25(OH)D-3) in the egg yolk also increased in response to UVB, although less pronounced than vitamin D-3. Meat revealed about 4-fold higher vitamin D-3 contents in response to UVB than to dietary vitamin D-3 (p<0.001). In conclusion, exposure of hens to UVB is an efficient approach to provide consumers with vitamin D-3-enriched foods from animal sources.

• 出版日期2013-7-24