2.12. Analysis.

Comparison 2 Head‐to‐head antioxidant(s), Outcome 12 Sperm concentration at 6 months (data not suitable for meta analysis).

Sperm concentration at 6 months (data not suitable for meta analysis)
Study	Antioxidant A	Antioxidant B	P value
Zinc vs Folic acid
Wong 2002	Zinc Median = 16 Range = 0.6 ‐ 80	Folic acid Median = 14 Range = 0.9 ‐ 130	Not provided
Zinc vs Zinc + Folic acid
Wong 2002	Zinc Median = 16 Range = 0.6 ‐ 80	Zinc + Folic acid Median = 12 Range = 0.5 ‐ 180	Not provided
Folic acid vs Zinc + Folic acid
Wong 2002	Folic acid Median = 14 Range = 0.9 ‐ 130	Zinc + Folic acid Median = 12 Range = 0.5 ‐ 180	Not provided