Overall, it is suggested that the volatile compounds PEA and Cin should be further studied as they may be potential therapeutic candidates for prevention of tau or α-synuclein fibrillation related to AD/PD, respectively, as well as other diseases such as SARS-CoV-2, where stimulating the sense of smell can improve patients’ cognitive function and allow nerve regrowth through odour-producing compounds. This evidence concerns the gene MAPT and Parkinson disease.