Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40104-019-0369-y/MediaObjects/40104_2019_369_Fig5_HTML.png)
Effects of dietary PQQ·Na2 supplementation during gestation and lactation on antioxidant status in milk of sows. Con, control treatment; PQQ, PQQ·Na2 treatment; a CAT, catalase; b SOD, superoxide dismutase; c MDA, malondialdehyde; d GSH-Px, glutathione peroxidase. All values are expressed as means ± SEM (n = 8). a, b Mean values within a column with unlike superscript letters were significantly different (P < 0.05)