INS and metabolic syndrome: Effect of oral administration of standard quercetin suspension (MQ), plain nano-pharmaceutical formulation (MN) and the quercetin loaded nano-pharmaceutical formulation (MNQ) both at 83 μmol/kg/day on serum insulin, triglycerides (TG) and total cholesterol (TC) levels, in metabolic syndrome (M) induced by feeding rats a high fructose (10% in drinking water), high salt (3%), high fat (25%) diet for 12 weeks.