Table 1.

Uraemic toxins that might influence brain function

Small water-soluble compounds	Protein-bound compounds	Middle molecules
ADMA SDMA TMAO Uric acid Urea Methylguanidine guanidine	Indoles IS Indoxyl glucuronide IAA Kynurenine Cresols pCS p-cresyl glucuronide Hippurates HA CMPF	B2M IL-6 PTH

ADMA, asymmetric dimethylarginine; SDMA, symmetric dimethylarginine; TMAO, trimethylamine N-oxide; CMPF, 3-carboxy-4-methyl-5-propyl-2-furanpropanoic acid.