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tryptophan → CapableOf → enter the brain	0.65
glucose → CapableOf → enter the brain	0.56
prion → CapableOf → enter the brain	0.51
bacteria → CapableOf → enter the brain	0.49
insulin → CapableOf → enter the brain	0.47
chemical → CapableOf → enter the brain	0.46
heroin → CapableOf → enter the brain	0.44
toxin → CapableOf → enter the brain	0.40
antibody → CapableOf → enter the brain	0.37
bilirubin → CapableOf → enter the brain	0.35
amino acid → CapableOf → enter the brain	0.30
elemental mercury (subgroup of mercury) → CapableOf → enter the brain	0.25
msg → CapableOf → enter the brain	0.22