HTR1A and neurodegenerative disease: Especially SER-4, the ortholog for the serotonin receptor 5-HT1A is very interesting in this respect; several recent studies have shown that CBD has an effect on preventing neurodegenerative diseases and on longevity in C. elegans (Wang et al. 2021; Zhang et al. 2022; Frandsen and Narayanasamy 2022; Land et al. 2021).