Fig. 6From: Effect of vitamin A supplementation on gut microbiota in children with autism spectrum disorders - a pilot studyDifferences in the bacterial community diversity, richness and structures between the Pre-VAI and Post-VAI groups according to the principal component analysis (PCA). Samples of children with ASD before the VA supplementation (Pre-VAI) (blue dots) were separated from children with ASD after 6Â months of VA supplementation (Post-VAI) (red dots)Back to article page