Figure 1. Flow chart of the number of studies identified and included into the meta-analysis

From

Effects of Melissa officinalis L. (Lemon Balm) Extract Supplementation on Cardiovascular Risk Factors: A Pooled Analysis of Randomized Controlled Trials

Dan Liao, Yanyan Liu, Zhiwei Ouyang, Polin Feng, Cuifen Li

Journal of Food and Nutrition Research. 2021, 9(7), 357-362 doi:10.12691/jfnr-9-7-5