Vitamin D-biofortified beef: a comparison of cholecalciferol with synthetic versus UVB-mushroom-derived ergosterol as feed source
Duffy, Sarah K.
O'Doherty, John V.
Clarke, Louise C.
Dowling, Kirsten G.
O'Grady, Michael N.
Kerry, Joseph P.
Cashman, Kevin D.
This study investigates dietary fortification of heifer feeds with cholecalciferol and ergocalciferol sources and effects on beef total vitamin D activity, vitamer, respective 25-hydroxymetabolite contents, and meat quality. Thirty heifers were allocated to one of three dietary treatments [(1) basal diet + 4000 IU of vitamin D3 (Vit D3); (2) basal diet + 4000 IU of vitamin D2 (Vit D2); and (3) basal diet + 4000 IU of vitamin D2-enriched mushrooms (Mushroom D2)] for a 30 day pre-slaughter period. Supplementation of heifer diets with Vit D3 yielded higher (p < 0.001) Longissimus thoracis (LT) total vitamin D activity (by 38–56%; p < 0.05) and serum 25-OH-D concentration (by 20–36%; p < 0.05), compared to that from Vit D2 and Mushroom D2 supplemented animals. Irrespective of vitamin D source, carcass characteristics, sensory and meat quality parameter were unaffected (p > 0.05) by the dietary treatments. In conclusion, vitamin D3 biofortification of cattle diets is the most efficacious way to enhance total beef vitamin D activity.
Cholecalciferol , Ergocalciferol , Vitamin D2-enriched mushrooms , Heifers , Longissimus thoracis
Duffy, S. K., O'Doherty, J. V., Rajauria, G., Clarke, L. C., Hayes, A., Dowling, K. G., O'Grady, M. N., Kerry, J. P., Jakobsen, J., Cashman, K. D. and Kelly, A. K. (2018) 'Vitamin D-biofortified beef: A comparison of cholecalciferol with synthetic versus UVB-mushroom-derived ergosterol as feed source', Food Chemistry, 256, pp. 18-24. doi: 10.1016/j.foodchem.2018.02.099