The ontology enrichment analysis of metabolites that were identified as gender, age and BMI related or were identified as highly variable (HV, CV>0.5) in the analysed healthy population subset.

Total number of differentially present (DP) metabolites (p<0.05) related on gender, age, BMI, BMI within male individuals, age within male volunteers (:male), BMI within female volunteers and age within female volunteers (:female) are also given. Fisher's exact test was used to calculate significance of ontology enrichment (p-value is reported; ns – not significant). ALL - all metabolites within the ontology group. Number of differentially present metabolites in each category is given in brackets within each category.