Beef cattle are susceptible to trace element deficiencies. The goal of this trial was to studythe efficacy of dam supplementation with organic or inorganic trace minerals. Thirteen BelgianBlue farms divided into two groups per farm were investigated, resulting in a randomized blockdesign, with two treatments. Animals in treatment A group received a supplement containing50% organic and 50% inorganic selenium, zinc, and copper, while those in treatment B groupreceived 100% inorganic sources. Blood zinc (p=0.08), selenium in blood (p<0.01) and colostrum(p<0.01) were higher in group A. No difference (p>0.1) was found between treatments regardingthe incidence of disease or daily weight gain of the calves. Although the zootechnical performancewas equal for both treatments, supplementation with organic trace minerals resulted in a greaternutritional efficacy to sustain the selenium and zinc statuses of the Belgian Blue cattle, and alsoseemed to mitigate inflammation associated with cesarean section.