Growing concerns are emerging about the widespread apply of erythritol, a popular sugar substitute, as new research suggests it may have detrimental effects on brain health and increase the risk of stroke. The findings add to a body of evidence questioning the safety of non-nutritive sweeteners, despite their long-standing reputation as harmless alternatives to sugar.
Scientists Examine Potential Health Risks of Sugar Substitutes
A review of existing studies has linked higher concentrations of erythritol in the bloodstream to an increased risk of cardiovascular problems. Researchers analyzed over one hundred sources, including studies, previous analyses, and data from the World Health Organization.
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Observations have shown that individuals with the highest levels of the sweetener had approximately twice the risk of experiencing acute events such as heart attack or stroke. While definitive proof is still lacking, the scale of the phenomenon has prompted renewed attention from the medical community.
How Erythritol Impacts Blood Vessels
Particularly concerning results came from experiments conducted at the University of Colorado Boulder and similar studies at the Cleveland Clinic. Scientists investigated the impact of erythritol on cells that form the blood-brain barrier, a critical protective system separating the brain from potentially harmful substances in the bloodstream. In laboratory conditions, signs of damage to this structure and oxidative stress were observed.
Researchers found that erythritol increased the production of free radicals while simultaneously weakening the cells’ natural antioxidant mechanisms. This dual effect may contribute to processes leading to blood clot formation. As study co-author Dr. W.H. Wilson Tang stated: “These findings raise some concern that a standard serving of food or beverage sweetened with erythritol may strongly stimulate direct clot-forming effect.”
Disrupted Balance Within the Body
Another piece of the puzzle emerged from the sweetener’s influence on the regulation of blood vessel tension. Proper blood flow depends on a delicate balance between nitric oxide (which widens blood vessels) and endothelin-1 (which narrows them). The study showed that erythritol lowered nitric oxide levels while simultaneously increasing endothelin-1 concentration.
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This shift may promote the maintenance of constricted vessels, limiting the supply of oxygen and nutrients to the brain. This is one of the mechanisms underlying ischemic stroke, caused by a clot blocking a vessel.
Naturally Occurring, But Is It Truly Harmless?
Erythritol is a sugar alcohol that occurs naturally in small amounts in the human body. Unlike artificial sweeteners like sucralose or aspartame, it has long been considered particularly safe. Both the European Food Safety Authority (EFSA) and the U.S. Food and Drug Administration (FDA) have approved its use in food.
Its popularity stems largely from the fact that it provides about 80 percent of the sweetness of sugar and does not cause sharp spikes in blood glucose. It has become a staple in many products marketed as fit and keto-friendly. Yet, new research indicates that even substances perceived as natural can cause side effects that become apparent only after several years.
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