The inventions discloses a trace element solution, which comprises at leastthe following metals: zinc； manganese；selenium； and copper； and which comprises a concentration of the metals of atleast 90 mg/ml. The solution may comprise thefollowing concentrations: at least 60 mg/ml zinc； at least 10 mg/ml manganese；at least 5 mg/ml selenium； and at least 15 mg/mlcopper. The solution may comprise chromium, iodine and chromium.
