Olive Leaf
Olea europaea
Olive Leaf is a polyphenol-rich herb used for immune and antioxidant support, with additional interest in cardiometabolic wellness.
Primary Use
Immune Support
Common Forms
Capsule, Tea
Typical Dose
500-1000 mg extract
Time to Effect
2-4 weeks
Overview
Olive leaf has deep roots in Mediterranean traditional medicine, where the olive tree has been revered both nutritionally and medicinally. While olive oil gets more attention, the leaf itself has become popular as a concentrated source of polyphenols such as oleuropein.
Today, olive leaf is used mainly for immune support, antioxidant support, and modest cardiometabolic wellness goals. It is not a cure-all, but it has a stronger research profile than many everyday herbs.
How It Works
Olive leaf contains oleuropein and related phenolic compounds that show antioxidant and antimicrobial activity in laboratory research. In simple terms, these compounds may help the body manage oxidative stress and support balanced inflammatory responses.
Some studies also suggest effects on blood pressure and glucose regulation. Those findings are promising, but the magnitude of benefit is usually modest rather than dramatic.
What It's Used For
Immune Support
Olive leaf is commonly used during periods of seasonal challenge because of its polyphenol-rich profile and antimicrobial laboratory findings. Human evidence is moderate but not definitive.
Antioxidant Support
Its polyphenols help explain why olive leaf is discussed as an antioxidant-support herb. This is well grounded in composition and mechanistic research.
Cardiometabolic Wellness
Some human studies suggest modest support for blood pressure and metabolic markers. Effects appear supportive rather than dramatic.
Dots indicate strength of research evidence (5 = strongest)
Disclaimer: This information is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider before starting any new supplement, especially if you have a medical condition or take medications.
Last updated: April 2026