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# Long description

The illustration shows a schematic of a set of scales equally balanced. On the left side of the scale are 11 red circles. On the right side of the scale are 11 blue circles. Underneath this set of scales on the left is a red, sliding bar with the wording ‘Firmicutes load’. Underneath the scales on the right is another sliding bar, this time in blue, labelled ‘Bacteroidetes load’.