Erythritol’s Potential Threat to Blood-Brain Barrier Stability
The blood-brain barrier plays a crucial role in protecting the brain, allowing essential substances like oxygen and nutrients to pass while keeping harmful toxins out. It’s a vital defense mechanism.
Recent findings indicate a surprising threat to this barrier, emerging from something we commonly consume—erythritol. This artificial sweetener has been a popular choice for many due to its negligible calorie count and sweetness, which is about 60–80 percent that of sugar, all without affecting insulin levels.
However, a study from the University of Colorado, Boulder, published in the Journal of Applied Physiology, has revealed concerning effects on brain endothelial cells when exposed to erythritol in lab settings.
Previous research has hinted at a connection between elevated erythritol levels and increased risks of heart attacks or strokes. This latest investigation might shed light on those associations, highlighting how erythritol could potentially be impacting health negatively.
The team noted that endothelial cells exposed to erythritol produced less nitric oxide—a key factor in keeping blood vessels relaxed—and more endothelin-1, a protein that narrows blood vessels, which is quite concerning.
Notably, the release of tissue plasminogen activator (t-PA), important for dissolving clots, was diminished, while levels of damaging free radicals rose. It raises questions about how increased erythritol levels in the bloodstream could correlate with a higher risk of clot formation and subsequent strokes.
“If blood vessels are constricted and the ability to break down clots is impaired, it naturally increases stroke risk,” explained physiologist Auburn Berry. She emphasizes that their research highlights erythritol’s potential role in this risk factor.
This research focused specifically on brain endothelial cells, relating findings to ischemic strokes, which occur when clots obstruct blood flow to the brain. There’s a chance that erythritol could likewise affect endothelial cells elsewhere in the body, potentially heightening heart attack risks, though that wasn’t explored in this study.
Another concern is that the damage to endothelial cells might leave the brain more vulnerable to other issues, but the current study didn’t delve into that aspect. The researchers suggest a cautious approach towards erythritol consumption given the implications of this research.
“Given the correlation seen in earlier epidemiological studies and our own cellular findings, monitoring intake of non-nutritive sweeteners like erythritol seems wise,” noted physiologist Christopher DeSouza.
A key point to remember is that this research was conducted in a lab setting with cell tests, not on live subjects, meaning real-world impacts could vary significantly.
Additionally, erythritol is produced naturally by the human body. Hence, the increase in its levels may not solely result from dietary sources but could indicate other underlying health issues. Some prior studies also suggest that erythritol may actually support vascular health.
It’s essential to weigh these factors carefully. However, the possible adverse effects of erythritol warrant further investigation, especially since its category as a sugar alcohol falls outside the scope of many other warnings related to artificial sweeteners.
This research highlights that what we often deem safe regarding non-nutritive sweeteners may, in fact, carry negative health consequences.
The study is published in the Journal of Applied Physiology.
