Peanut butter and Alzheimer's

The researchers discovered that those who had an impaired sense of smell in the left nostril had early-stage Alzheimer's. They noted that the participants needed to be an average of 10 centimeters closer to the peanut butter container in order to smell it from their left nostril compared to their right nostril. The results showed the effect on brain activity was not just confined solely by what one smells, as other factors were also altered.

A slight increase after 6 weeks when subjects smelled a combination involving some odorant; this study found evidence for change within individuals with certain psychiatric disorders and thus there could have been effects including alcohol use disorder or even schizophrenia (I've seen similar explanations before but I believe my bias is valid). '"In addition", reported John D'Amico, they concluded that since these findings are so significant they should lead patients taking antipsychotics towards seeking further diagnostic work at the neuropsychiatric institute.