Vitamin and mineral content of value cuts from beef steers fed distiller's grains

Selected vitamin (vitamin E, thiamin, riboflavin, niacin, vitamin B₆, and vitamin B₁₂) and mineral (calcium, phosphorus, magnesium, potassium, sulfur, iron, copper, zinc, manganese, and sodium) concentrations were determined for the value cuts—flat iron steaks (musculus infraspinatus) and petite tenders (musculus teres major) from cross-bred steers fed finishing rations containing 0% or 40% DM wet distiller's grains plus solubles (WDGS) with and without added daily supplemental vitamin E. The feeding treatment groups were: 0% WDGS with basal vitamin E (n = 6), 0% WDGS with supplemental vitamin E (500 IU/steer top-dressed daily) (n = 7), 40% WDGS with basal vitamin E (n = 8), and 40% WDGS with supplemental vitamin E (n = 8). Few differences in micronutrient concentrations were observed in either cut by treatment groups. Feeding steers diets containing 40% WDGS decreased vitamin B₁₂ and increased sodium concentrations in flat iron steaks and increased thiamin and decreased manganese concentrations in petite tenders. Significant differences in α-tocopherol concentrations in both cuts were observed by vitamin E grouping. Several significant differences were observed by cut. Uncooked flat iron steaks and petite tenders from these steers are rich sources of vitamin B₁₂, zinc, and sometimes phosphorus, good sources of riboflavin, niacin, vitamin B₆, and iron, and low in sodium.