The paper by L. Zhou et al. in the paper entitled “Hu-Lu-Ba-Wan attenuates diabetic nephropathy in type 2 diabetic rats through PKC-α/NADPH oxidase signaling pathway” reported the attenuation of diabetic nephropathy in type 2 diabetic rats through PKC-α/NADPH oxidase signaling pathway by Hu-Lu-Ba-Wan. Here, FMO5 is linked to type 2 diabetes mellitus.