Olive-leaf polyphenols (oleuropein)

Tier 3 — weak evidence · Cardiovascular · Antimicrobial · Antioxidant

Concentrated extract from olive (Olea europaea) leaves standardised to oleuropein, the dominant polyphenol. Small RCTs show modest blood-pressure lowering and improvements in lipid profile and oxidised LDL, plus traditional antimicrobial use. Generally very well tolerated. Standardisation matters — products vary from 6% to 40% oleuropein content.

Dose: 500–1,000 mg standardised extract (≥18% oleuropein) daily