Fig. 3

Plant morphology, geographical distribution, products, and clinical studies of fenugreek. A Plant morphology of Trigonella foenum-graecum L. (Fenugreek). B Geographical distribution of fenugreek. C Representative products developed based on fenugreek from western countries. D Representative products developed based on fenugreek from eastern countries. E Clinical trials of Sea buckthorn. Data collected from PubMed and ClinicalTrials.com as of June 2021 (Pubmed: searching term of “Trigonella foenum-graecum” or “fenugreek” plus filter of “Clinical trial”, language limited to English); ClinicalTrials.gov: searching term of “Trigonella foenum-graecum” or “fenugreek”)