Blood Sugar Spikes and Fiber Loss Caused by Blended Fruits
Blending or juicing fruit destroys about 90% of its dietary fiber, turning a nutritious meal into a fast-absorbing liquid that causes rapid blood sugar spikes and places heavy demands on liver metabolism, view.asiae.co.kr reported. Health experts warn that drinking fruit juice in the morning mimics the metabolic effects of consuming alcohol and heightens the risk of developing fatty liver disease.
"These 4 foods I wouldn't eat even if they brought them to me for free," Lee said, placing fruit juice alongside cereal, french fries, and ice cream. He added that while people often drink fruit juice believing it is healthier than coffee, commercial varieties contain high amounts of sugar that drive blood sugar upward rapidly.
“When you grind fruit, you destroy its fiber,” Lee explained, noting that the removal of this structural matrix allows sugar to enter the bloodstream much faster. This rapid absorption occurs whether the beverage comes from a commercial shelf, a packaged 100% juice carton, or a home blender.
Endocrinologist Warnings and Research Findings on Fructose Absorption
Woo explained that consuming blended fruit during morning hours—when the body absorbs nutrients quickly—causes fructose to enter the system at an accelerated rate, spiking blood glucose and increasing fatty liver risks. "Drinking blended fruit is similar to drinking alcohol," Woo said, adding that consuming fruit juice the morning after drinking alcohol is a worst-case scenario for liver strain.
The study on fruit juice diets found that juicing or blending fruit strips away roughly 90% of its fiber while concentrating the proportion of free fructose. Researchers concluded that liquid fruit leads individuals to consume more fructose, faster, often exceeding daily sugar limits and paving the way for obesity and hyperlipidemia.
Experts Recommend Protein and Fiber for Breakfast
Dietary specialists advise against building morning meals around refined carbohydrates and simple sugars. The common breakfast combination of bread, jam, and fruit juice presents significant challenges for glycemic control. Given the high carbohydrate baseline typical of many diets, experts recommend structuring morning meals around protein, healthy fats, and fiber-rich vegetables like cruciferous greens to sustain satiety and stabilize metabolic function.
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