Olive leaf extract, derived from the leaves of the olive tree (Olea europaea), has a long history of traditional use in Mediterranean cultures and has gained modern scientific interest for its diverse bioactive compounds, particularly oleuropein. Research suggests that oleuropein and related polyphenols contribute meaningful antioxidant activity, and studies indicate potential benefits for supporting healthy blood pressure and blood sugar levels already within normal ranges. Preliminary evidence also points to antimicrobial properties, with laboratory research showing activity against a range of bacteria and viruses, though more robust human trials are needed to confirm these effects. Most standardized supplements are concentrated for oleuropein content, which is considered the primary active constituent responsible for the extract's role in supporting immune function and cardiovascular wellness.
Compare this supplementResearch suggests that olive leaf extract (OLE) demonstrates notable antimicrobial properties across a range of bacte...
View studies →Research suggests that olive leaf extract contains bioactive compounds, particularly oleuropein and related polypheno...
View studies →Research suggests that olive leaf extract may support blood pressure regulation through multiple mechanisms, includin...
View studies →Research on olive leaf extract and blood sugar regulation is limited in the current evidence base, and the available ...
View studies →Research on olive leaf extract and immune function is currently limited, and the available evidence does not yet prov...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Capsule | 250–750 mg | Daily | General health and antioxidant support | Commonly referenced range in human supplementation studies standardized to oleuropein content |
| Extract | 500 mg | Twice daily | Antioxidant support | Used in RCTs measuring oxidative stress markers and antioxidant capacity |
| Extract | 500–1,000 mg | Daily | Blood pressure regulation | Based on RCTs including a notable trial showing equivalence to captopril at 500mg twice daily |
| Extract | 250–500 mg | Twice daily | Blood sugar regulation | Common in clinical trials examining glycemic control and insulin sensitivity |
| Extract | 400–1,000 mg | Daily | Immune function and antimicrobial properties | Range observed across clinical and in vivo studies on immune modulation |