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Olive Leaf Extract: study protocols

9 study groups say how much Olive Leaf Extract participants took a day. These are the doses the studies gave. They are not a recommendation.

Olive Leaf Extract: what the research found →

Dose per serving from products

683 products in our catalogue print how much Olive Leaf Extract a serving holds.

Most common: 100 mg to 250 mg, 22% of 683 products.

Dose per servingProducts
10 mg or less
34
10 mg to 25 mg
65
25 mg to 50 mg
77
50 mg to 100 mg
145
100 mg to 250 mg
153
250 mg to 500 mg
144
500 mg to 1 g
60
over 1 g
5

Dose per serving from research

7 study groups in 6 studies say how much Olive Leaf Extract participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 500 mg to 1 g, 43% of 7 study groups.

Daily doseStudy groups
100 mg to 250 mg
2
250 mg to 500 mg
1
500 mg to 1 g
3
1 g to 2.5 g
0
2.5 g to 5 g
0
5 g to 10 g
0
10 g to 25 g
1

Commonly used together

1 of 9 study groups took Olive Leaf Extract with something else, but nothing that 3 or more different studies gave.

9 study groups

Study
Efficacy of olive leaves extract on the outcomes of hospitalized covid-19 patients: A randomized, triple-blinded clinical trial
2023 · Intervention A · Adults aged 18–72 hospitalized with COVID-19
500 mg5 days48
Efficacy of olive leaves extract on the outcomes of hospitalized covid-19 patients: A randomized, triple-blinded clinical trial
2023 · Intervention B · Adults aged 18–72 hospitalized with COVID-19
1 g5 days46
Olive Leaf Extract Supplementation Improves Postmenopausal Symptoms: A Randomized, Double-Blind, Placebo-Controlled Parallel Study on Postmenopausal Women
2024 · OLE group · Healthy postmenopausal women aged 47–70 years
250 mg12 weeks—
The Effect of Olive Leaf Extract on Upper Respiratory Illness in High School Athletes: A Randomised Control Trial
2019 · OLE · Healthy high-school elite-sport athletes aged 16–19 years; female and male
20 g60 days—
Olive (Olea europaea) leaf extract effective in patients with stage-1 hypertension: comparison with Captopril
2011 · Olive leaf extract group · People with stage-1 hypertension; age and sex not specified
1 g8 weeks—
Impact of phenolic-rich olive leaf extract on blood pressure, plasma lipids and inflammatory markers: a randomised controlled trial
2017 · Olive leaf extract (OLE) · Men aged 24–72 years who were pre-hypertensive, non-smoking, and free from chronic disease
20 mL6 weeks61
Indirect Chronic Effects of an Oleuropein-Rich Olive Leaf Extract on Sucrase-Isomaltase In Vitro and In Vivo
2019 · OLE capsules · Healthy, non-diabetic females aged 18–22 years
750 mg7 days11
Human Intervention Study to Assess the Effects of Supplementation with Olive Leaf Extract on Peripheral Blood Mononuclear Cell Gene Expression
2016 · OLE arm · Healthy men; age range not reported
20 mL8 weeks15
Oleuropein Supplementation Increases Resting Skeletal Muscle Fractional Pyruvate Dehydrogenase Activity but Does Not Influence Whole-Body Metabolism: A Randomized, Double-Blind, and Placebo-Controlled Trial in Healthy, Older Males
2025 · Oleuropein (OLE) · Healthy males aged 60 ± 5 years
250 mg36 days—