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Isolated soluble dietary fibre supplementation significantly decreased HOMA-IR in overweight and obese people (n = 489). Black rectangles represent MD for each study; the size of the rectangle is proportional to the weight of the study for the pooled effect. Horizontal line indicates 95% CI. The black diamond summarises the pooled MD data. MD = mean difference; (1)/(2) indicate cohort 1 and 2 of study [51,52,54,56,62,63,64,65,70,71,72,75,76].
