Trace element solution

1. A trace element solution, which comprises at least the following metals:

(a) zinc directly and/or indirectly from Zn-EDTA and/or Zn oxide, wherein zinc is present in at least 65 mg/ml zinc directly and/or indirectly from Zn-EDTA and/or Zn oxide;

(b) manganese directly and/or indirectly from Mn-EDTA and/or manganese carbonate;

(c) copper directly and/or indirectly from Cu-EDTA and/or copper oxide and/or copper sulphate, and/or copper carbonate; and

(d) selenium derived directly and/or indirectly from Na 2 SeO 4 and/or Na 2 SeO 3 ,

wherein the metals are present in a solution of water, chlorocresol and/or benzyl alcohol, at a concentration of metals of at least 95 mg/ml;

wherein the pH of the trace element solution adjusted by means of 30% NaOH in an injectable trace element solution that is visually stable; and

wherein a ratio of zinc to manganese is at least 6.5:1.

2. The trace element solution of claim 1 , wherein manganese is present in at least 10 mg/ml manganese directly and/or indirectly from Mn-EDTA and/or manganese carbonate.

3. The trace element solution of claim 1 , wherein copper is present in at least 15 mg/ml copper directly and/or indirectly from Cu-EDTA and/or copper oxide and/or copper sulphate, and/or copper carbonate.

4. The trace element solution of claim 1 , wherein selenium is present in at least 5 mg/ml selenium derived directly and/or indirectly from Na 2 SeO 4 and/or Na 2 SeO 3 .

5. The trace element solution of claim 1 , wherein a ratio of zinc to copper is at least 4:1.

6. The trace element solution of claim 1 , wherein a ratio of zinc to selenium is at least 13:1.

7. The trace element solution of claim 1 , further comprises iodine.

8. The trace element solution of claim 7 , wherein iodine is present in 50 mg/ml.

9. The trace element solution of claim 7 , wherein the iodine is derived from potassium iodide.