BatchelderOrganics

The cardiovascular effects of lemongrass (C. citratus) EO were evaluated in a preclinical model—specifically how its primary constituents (geranial and neral) affect heart muscle activity and ion channels. The findings suggest that lemongrass oil slows the heart down and makes its beats less forceful, which could help lower blood pressure—a potential benefit for people dealing with hypertension. It does this by calming the electrical signals in heart cells that control how the heart beats. However, the same effects that relax the heart can also interfere with its normal rhythm, sometimes causing irregular or abnormal heartbeats (arrhythmias). So while it may offer cardiovascular benefits, especially for lowering blood pressure, it also carries risks that would need to be carefully managed before it could be considered safe for human use.
https://pubmed.ncbi.nlm.nih.gov/41881061/