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Olive Leaf

The cultivation of olive trees is a known practice in the Mediterranean region, which dates to ancient times, with the average annual consumption being between 0.5 and 1.5kg/person Olive tree leaves are known in the Mediterranean region, where they are used as traditional medicine. 

Olive tree leaves are rich in flavonols, secoiridoids, and polyphenols, more than olive oil or olives. Olive leaf is known for its cardioprotective, neuroprotective, antioxidative, and hypoglycaemic activities due to its high concentration of polyphenolic compounds in OLE.

Olive leaves support the immune system

Oleuropein, the main active component in olive tree leaves, has been shown to modify human immune response (1,2), increase nitric oxide production in macrophages and produce strong antimicrobial and antiviral activity.

Consumption of olive leaf tea can positively increase blood parameters

Consumption of olive leaf tea (500mL twice a day) led to an increase in hematocrit and hemoglobin and RBC count in non-anemic participants, after six months of daily consumption (3).

Olive leaves positively affect cardiac parameters

Consumption of an olive leaf extract has been shown to significantly reduce triglyceride levels and systolic and diastolic blood pressure in participants with stage-1 hypertension (4).

1. Magrone T, Spagnoletta A, Salvatore R, Magrone M, Dentamaro F, Russo MA, Difonzo G, Summo C, Caponio F, Jirillo E. Olive Leaf Extracts Act as Modulators of the Human Immune Response. Endocr Metab Immune Disord Drug Targets. 2018;18(1):85-93.   PMID: 29149822.

2. Somerville V, Moore R, Braakhuis A. The Effect of Olive Leaf Extract on Upper Respiratory Illness in High School Athletes: A Randomised Control Trial. Nutrients. 2019 Feb 9;11(2):358.  PMID: 30744092; PMCID: PMC6412187.

3. Ferdousi F, Araki R, Hashimoto K, Isoda H. Olive leaf tea may have hematological health benefit over green tea. Clin Nutr. 2019 Dec;38(6):2952-2955.  Epub 2018 Nov 20. PMID: 30501915.

4. Qabaha, K., AL-Rimawi, F., Qasem, A., & Naser, S. A. (2018). Oleuropein Is Responsible for the Major Anti-Inflammatory Effects of Olive Leaf Extract. Journal of Medicinal Food, 21(3), 302–305. 

5. Susalit E, Agus N, Effendi I, Tjandrawinata RR, Nofiarny D, Perrinjaquet-Moccetti T, Verbruggen M. Olive (Olea europaea) leaf extract effective in patients with stage-1 hypertension: comparison with Captopril. Phytomedicine. 2011 Feb 15;18(4):251-8.  Epub 2010 Oct 30. PMID: 21036583.