| Pb | lead |
| ALAD | aromatic l-amino acid decarboxylase |
| G6PD | glucose-6-phosphate dehydrogenase |
| δ-ALAD | δ-aminolevulinic acid dehydratase |
| δ-ALA | δ-aminolevulinic acid |
| GSH | glutathione |
| GSSG | glutathione disulfide |
| WHO | World Health Organization |
| IARC | International Agency for Research on Cancer |