Erratum

After publication of the original article [1], it was brought to our attention that the unit for concentration in the first column of Table 2 should read μg/mL. In addition, the 9th row in Table 2 should read EC50 (μg/mL).

Table 2 Percent of DPPH free radical scavenging activity and antioxidant strength of N-(2-mercaptopropionyl) glycine (MPG), vitamin C (Vit- C), grape seed proanthocyanidin (GP), B. monnieri n-butanolic fraction (BM-ButFr) or standard butylated hydroxytoluene (BHT) against their respective concentrations

The original article was corrected. The corrections have been published in this erratum for quick reference. We apologise for any confusion this may have caused.