Formaldehyde from environment.- Anabolism and metabolism of formaldehyde in vivo.- Formaldehyde playing a role in (de)methylation for memory.- Dehydration, formaldehyde and age-related cognitive impairment.- The role of formaldehyde in cell proliferation and death.- Gut microbiota, formaldehyde dysmetabolism, and cognitive impairment.- Effects of formaldehyde on protein (Tau) aggregation and cytotoxicity.- Cognitive ability and impairment related to formaldehyde.- Tau phosphorylation and amyloid b deposition in the presence of formaldehyde.- Formaldehyde exposure and neuropsychiatric disorders.- Formaldehyde affecting lifespan and stress resistance in Drosophila.- Potential interventions on formaldehyde induced neuronal toxicity.- Molecular, cellular and animal experiments in formaldehyde study.- Methods in determination of formaldehyde.- Glossary