Effects of olive leaf polyphenols on blood lipid profiles and cardiovascular risk markers in healthy and at-risk populations: a narrative review.
van Stratum SLM, Stevens Y, Plat J
Phytochemicals
The olive tree you might grow in a pot on your patio or harvest from a Mediterranean garden produces leaves whose compounds have now been reviewed across multiple human trials for real, measurable heart-health benefits — not just the fruit.
Olive trees make special protective chemicals in their leaves, not just their oil. Researchers gathered and reviewed many studies showing that taking these leaf compounds — either as a tea, extract, or supplement — can lower bad cholesterol and reduce signs of inflammation in people's blood. The effects were seen both in generally healthy people and in those already dealing with high cholesterol or early heart disease risk.
Key Findings
Olive leaf polyphenols, particularly oleuropein, were associated with reductions in LDL ('bad') cholesterol and total cholesterol across multiple reviewed trials
Supplementation with olive leaf extract was linked to decreases in triglyceride levels and improvements in HDL ('good') cholesterol ratios in at-risk populations
Anti-inflammatory and antioxidant markers (such as reduced oxidized LDL and lower CRP levels) were consistently improved, suggesting a mechanism beyond simple lipid lowering
chevron_right Technical Summary
A narrative review of published research finds that polyphenols extracted from olive leaves — particularly oleuropein and hydroxytyrosol — can meaningfully reduce LDL cholesterol, triglycerides, and inflammatory markers associated with cardiovascular disease in both healthy adults and those at elevated risk.
Species Mentioned
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The olive is a species of subtropical evergreen tree in the family Oleaceae. Originating in Asia Minor, it is abundant throughout the Mediterranean Basin, with wild subspecies in Africa and western Asia; modern cultivars are traced primarily to the Near East, Aegean Sea, and Strait of Gibraltar. ...