Table 1 Summary of the metabolites present in the plasma of insulin-dysregulated ponies, grouped by chemical classes, before and after normalisation. Metabolites that were below the limit of detection in > 50% of samples, or which had a coefficient of variation within QC-samples > 20%, are excluded. Summary columns were added (i.e. sum of each class, except for sugars, and kynurenine:tryptophan ratio), resulting in 132 features included in the data analysis