J Integr Med. 2016 Jan;14(1):44–50. doi: 10.1016/S2095–4964(16)60241–8. Studies on metals and pesticide content in some Ayurvedic formulations containing Bacopa monnieri L. "Out of 12 samples, Pb, Cd, Cr and Ni were present in all samples but below the permissible limit. Although atrazine, aldrin, dialdrin were in below detection limit, but other pesticides were detected in some samples as oxamyl, hexachlorocyclohexanes (α-HCH, β-HCH and γ-HCH), dichlorodiphenyl trichloroethane and dichlorodiphenyl dichloroethylene."