Researchers found that drinking orange juice daily changes thousands of immune-cell genes.
Many of these genes regulate blood pressure, control sugar metabolism, and reduce inflammation.
These mechanisms play a vital role in long-term cardiovascular health, experts say.
David C. Gaze of the University of Westminster explains that orange juice triggers measurable changes in the body.
Reduced Inflammation and Improved Blood Pressure
Adults drank 500 ml of pasteurised orange juice daily for two months in a recent study.
After 60 days, genes linked to stress and inflammation—NAMPT, IL6, IL1B, NLRP3—showed lower activity.
The SGK1 gene, which controls kidney sodium retention, also decreased activity.
Researchers say these shifts relax blood vessels, reduce inflammation, and protect heart health.
Hesperidin, a flavonoid in oranges, supports these benefits by influencing cholesterol, blood pressure, and sugar metabolism.
Body type affects results: overweight individuals saw stronger changes in fat-metabolism genes, leaner participants showed more inflammation-gene adjustments.
Heart and Metabolic Benefits
A review of 15 studies involving 639 people shows orange juice reduces insulin resistance and LDL cholesterol.
Overweight participants experienced slightly lower systolic blood pressure and higher HDL after daily intake.
Orange juice influences energy use, cell communication, and inflammatory pathways, according to metabolite studies.
Blood orange juice increased gut bacteria that produce short-chain fatty acids, supporting healthy blood pressure and reduced inflammation.
In people with metabolic syndrome, orange juice improved endothelial function, allowing vessels to relax and lowering heart-attack risk.
Factory workers in Brazil who consumed orange juice displayed lower apo-B levels, reducing cholesterol particles that increase cardiac risk.
Overall, orange juice consistently promotes blood flow, reduces inflammation, and supports heart and metabolic health.
