A daily glass of orange juice may lower blood pressure and reduce inflammation, according to recent research. While fruit juices have been criticised for their high sugar content, studies suggest that moderate consumption of orange juice could benefit heart health and cognitive function.
Meta-analyses of randomised controlled trials found that drinking 500ml of orange juice daily was linked to lower blood glucose, improved insulin function, and reduced 'bad' LDL cholesterol. Another analysis showed that a daily glass over several weeks lowered systolic blood pressure in overweight and obese adults, while raising 'good' HDL cholesterol.
Nutrition scientist Federica Amati of Imperial College London notes that whole oranges contain fibre, which slows sugar absorption, whereas juice lacks fibre and causes a rapid blood sugar spike. However, she emphasises that the sugars in orange juice are accompanied by bioactive nutrients like vitamin C, and the health impact depends on the overall diet.
In a separate trial, 24 healthy men aged 30–45 who drank 240ml of 100% orange juice showed improved cognitive performance and alertness after six hours, compared with a decline in those who consumed a sugary placebo drink. The findings suggest that orange juice may offer benefits beyond simple sugar content.
