A new Iowa State University study1
proved that injecting trace minerals is an effective way to improve the trace mineral status of cattle and showed oral pastes and drenches are affected by:
- Low rates of intestinal absorption regardless of source
- Antagonists such as sulfur, molybdenum, iron in the rumen
1Jackson, Trey D., et al. “Comparison of multiple single-use, pulse-dose trace mineral products provided as injectable, oral drench, oral paste or bolus on circulating and liver trace mineral concentrations of beef steers.” Applied Animal Science 36, 2020, pp. 26-35.