Fig. 3 shows the chelating effects of the methanolic extract of the cultivated and wild edible mushroom species. The optimized concentration range chosen to compare chelating power and to interpolate the EC50 (effective concentration at which 50% Fe2+/ferrozine complex is inhibited) is from 0.05 to 1.5 mg/ml. Chelating effect was higher for A. campestris 69.7% inhibition at 0.25 mg/ml concentration to support its superior scavenging and reducing activity. On the contrary, L. sulphureus had the least metal chelating effect with only 27.2% at 0.25 mg/ml concentration