What happens when you drink two glasses of orange juice daily for two months? Pasteurized orange juice study reveals it influences genes linked to heart health and inflammation

Pasteurized orange juice study: A new study on pasteurized orange juice has revealed surprising biological changes that take place in the body when a person drinks two glasses, about 500 ml, of pure orange juice every day for two months. The findings suggest that the breakfast staple does far more than offer a quick vitamin boost; it actively reshapes how thousands of genes behave, influencing blood pressure, inflammation, and sugar metabolism.

Drinking two glasses of orange juice alters thousands of genes

According to the pasteurized orange juice study, published in Molecular Nutrition & Food Research, participants who drank 500 ml of pasteurized orange juice daily for 60 days showed measurable changes in the activity of genes inside immune cells.

Many of these genes regulate blood pressure, inflammation, and glucose control, all crucial for long-term heart health.


David C. Gaze, senior lecturer in chemical pathology at the University of Westminster, explained in The Conversation that these gene-level shifts demonstrate how a simple dietary habit can alter key physiological systems.

Drinking two glass of orange juice reduces inflammation and blood pressure

Key inflammation-related genes, including NAMPT, IL6, IL1B, and NLRP3, became significantly less active after two months of daily orange juice consumption. These genes typically switch on when the body is stressed or inflamed.

Another gene, SGK1, which influences how much sodium the kidneys retain, also showed reduced activity. Lower SGK1 activity is associated with healthier blood pressure levels.

These findings align with previous research showing that regular orange juice intake can help lower blood pressure in young adults.

Researchers say the pasteurized orange juice study points to subtle but meaningful shifts in the body’s regulatory systems: relaxed blood vessels, reduced inflammation, and better cardiovascular protection.

Hesperidin: The natural compound behind the changes

The pasteurized orange juice study highlights the role of hesperidin, a flavonoid found naturally in oranges. Known for its antioxidant and anti-inflammatory properties, hesperidin appears to influence blood pressure, cholesterol regulation, and sugar metabolism, Gaze explains.

The response also differed by body type:

• Overweight individuals saw greater changes in genes linked to fat metabolism.
  
• Lean participants showed stronger reductions in inflammation-related genes.

Can orange juice improve insulin resistance and cholesterol?

A separate analysis of 15 controlled studies involving 639 people found that regular orange juice consumption may reduce insulin resistance, a major risk factor for pre-diabetes, and lower LDL (bad) cholesterol.

Another trial on overweight adults found that a few weeks of daily orange juice slightly reduced systolic blood pressure while raising HDL (good) cholesterol. Though small, researchers say these improvements accumulate over time to support heart health.

Drinking two glass of orange juice and gut health

Metabolite studies show that orange juice can influence the body’s energy usage, cell-to-cell signalling, and inflammation pathways.

After one month, people drinking blood orange juice showed increased levels of gut bacteria that produce short-chain fatty acids, compounds linked to healthier blood pressure and lower inflammation.

Overall, while some studies report modest changes, the pasteurized orange juice study supports a broader trend: drinking two glasses of orange juice daily may reduce inflammation, improve blood flow, and benefit cardiovascular risk markers over time.