It may help reduce high systolic blood pressure
In a 2011 study, 72 male volunteers were given either lemongrass tea or green tea to drink. Those who drank the lemongrass tea experienced a moderate drop in systolic blood pressure and a mild increase in diastolic blood pressure. They also had a significantly lower heart rate.
A 2021 review of studies found that lemongrass extracts and essential oils have all shown anti-hypertensive effects in both animal and human models.
Although these findings are exciting if you have high systolic blood pressure, researchers caution that men with heart problems should use lemongrass in moderation to avoid dangerous drops in heart rate or increased diastolic pressure.