Fruit juice and cholesterol levels
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Fruit Juice and Cholesterol Levels: General Effects
Research shows that the impact of fruit juice on cholesterol levels varies depending on the type of juice, its components, and the population studied. A large meta-analysis of 19 randomized controlled trials found that, overall, fruit juice consumption did not significantly affect total cholesterol (TC), high-density lipoprotein cholesterol (HDL-C), or low-density lipoprotein cholesterol (LDL-C) in adults. However, a small reduction in diastolic blood pressure was observed, and a significant reduction in total cholesterol was seen only in groups with low polyphenol intake from juice .
Specific Fruit Juices and Cholesterol Reduction
Star Fruit Juice
Studies on star fruit juice (Averrhoa bilimbi) indicate it can significantly reduce cholesterol levels in people with hypercholesterolemia, suggesting its potential as a non-pharmacological therapy for managing high cholesterol .
Orange Juice
Research involving people with moderate hypercholesterolemia found that consuming 750 mL of orange juice daily increased HDL-cholesterol by 21% and decreased the LDL-HDL cholesterol ratio by 16%, improving the overall blood lipid profile .
Dragon Fruit Juice
Multiple studies have shown that dragon fruit juice can lower total cholesterol. In elderly participants, a significant reduction in total cholesterol was observed after consuming dragon fruit juice . Animal studies also found that red dragon fruit juice reduced total cholesterol levels in hypercholesterolemic mice, with higher doses leading to greater reductions .
Avocado Juice
Animal studies demonstrate that avocado juice can lower cholesterol levels, likely due to its content of hypolipidemic agents such as beta-sitosterol, omega-9, and various vitamins .
Pineapple Juice and Mixed Fruit Juices
Research on pineapple juice and mixed fruit juices (including red guava and dragon fruit) in pre-elderly patients with high cholesterol showed slight decreases in cholesterol levels, but these changes were not statistically significant .
Rhodomyrtus tomentosa Fruit Juice
In animal studies, supplementation with Rhodomyrtus tomentosa fruit juice prevented increases in total cholesterol, LDL, and triglycerides, and also prevented atherosclerosis development in rats fed a high-fat, high-cholesterol diet .
Fruit Juice Components and Cholesterol
Beta-Glucan-Enriched Fruit Juice
A study found that fruit juice enriched with beta-glucan (a type of soluble fiber) significantly lowered total and LDL cholesterol by 4.8% and 7.7%, respectively, compared to a control group. This effect is attributed to reduced cholesterol absorption .
Apple Juice: Clear vs. Cloudy
Research comparing whole apples, apple pomace, clear apple juice, and cloudy apple juice found that whole apples and cloudy juice slightly lowered LDL cholesterol, while clear apple juice actually increased LDL cholesterol. The cholesterol-lowering effect is linked to the fiber and polyphenol content, which are reduced in clear juice .
Conclusion
The effect of fruit juice on cholesterol levels depends on the type of fruit, the presence of bioactive compounds like fiber and polyphenols, and the form in which the juice is consumed. While some juices, such as star fruit, orange, dragon fruit, and avocado, show potential for lowering cholesterol, others may have little effect or could even increase cholesterol if key components are removed during processing. Enriching fruit juice with fiber, such as beta-glucan, can enhance its cholesterol-lowering properties. Overall, whole fruits or juices retaining their natural fiber and polyphenols are more likely to benefit cholesterol levels.
Sources and full results
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