I wrote this review to explore how sleep helps the brain clear out waste and why this process might be important for aging, memory loss prevention and brain diseases like Alzheimer’s. The brain has a cleaning system, called the glymphatic system, that works like a cleaning network during sleep. While many researchers have studied different parts of it, few papers bring together findings from brain anatomy, sleep patterns, aging and genetics all in one place. My goal was to give a full picture of how sleep supports brain health and what might happen when this system does not work properly. I also pointed out where the science is still unclear, what questions remain and how future research could improve our understanding. By reviewing the strongest ideas in the field and suggesting possible ways to improve brain waste clearance, I hope this paper helps move the science forward.

Parkinson’s disease (PD) is a common neurodegenerative disease (NDD) that is characterized by the gradual loss of dopaminergic neurons and progressive motor impairment. Recent studies suggest that PD may originate in the gut, highlighting the gut-brain axis (GBA) as a critical area for research. This study investigated the neuroprotective potential of Trachyspermum ammi (T. ammi) oil on PD-associated symptoms using Caenorhabditis elegans (C. elegans) as a model organism. This study will assess various PD symptoms, including impaired locomotion, dopaminergic neuron degeneration, elevated reactive oxygen species (ROS) levels and gut permeability. The researcher procured C. elegans genetically modified to develop Parkinson’s disease and exposed them to varying concentrations of T. ammi oil by incorporating it into the worms’ food. PD was ultimately induced in C. elegans genetic models by introducing varying concentrations of T. ammi oil through the worm’s food. Behavioral assays (locomotion, thrashing) as well as physiological assays (oxidative stress, alpha-synuclein levels and gut permeability), were conducted to assess the impact of T. ammi oil on these parameters. Results from these assays suggested a positive effect of T. ammi on Parkinson’s, with the Ajwain-treated groups showing improved locomotion, thrashing, improved survival under oxidative stress and even lowered alpha-synuclein levels. The findings support the hypothesis that T. ammi oil mitigates PD-like symptoms in C. elegans. The results could be further applied to develop an efficient, cost-effective and widely available treatment for mitigating PD symptoms in humans.