The aromatherapy naturals signature scent of lavendar with the smell of sweet orange are excellent for helping to calm the body and promoting restful sleep.  Orange can help with "sweet dreams" as it can help one stay asleep. Lavender is fabulous for helping one to be less stressed and fall asleep.
 
The study from National Library of Medicine (https://pubmed.ncbi.nlm.nih.gov/20377818/) has concluded that aromatherapy an efficacious non-pharmacological therapy for dementia. Aromatherapy may have some potential for improving cognitive function, especially for patient with Alzheimer's disease.