The researchers found evidence suggesting that certain herbs and spices can reduce blood pressure in hypertensive and pre-hypertensive people, but not in normotensive people.
Journal Reference:
Driscoll KS, Appathurai A, Jois M, Radcliffe JE. EFFECTS OF HERBS AND SPICES ON BLOOD PRESSURE: A SYSTEMATIC REVIEW AND META-ANALYSIS. Journal of Hypertension. April 2019;37(4):671–679. DOI: 10.1097/hjh.0000000000001952