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It just keeps getting better and better: Dementia Linked With Treatment For Chronic Lower Back Pain https://www.sciencealert.com/dementia-linked-with-treatment-for-chronic-lower-back-pain A drug widely used to treat nerve pain and epilepsy has been linked with an increase in cases of dementia and mild cognitive impairment. A team from Case Western Reserve University School of Medicine, Arizona State University, and the MetroHealth Medical Center in the US crunched the numbers on 26,416 records of patients with chronic lower back pain, looking at the relationship between prescriptions for the anticonvulsant gabapentin and dementia diagnoses. Having six or more gabapentin prescriptions was linked to a significant increase in dementia risk and mild cognitive impairment (MCI), the data showed: those in that group were 29 percent and 85 percent more likely to be diagnosed with dementia and MCI respectively, within 10 years. The increase was higher among patients aged between 35 and 49, and also rose with the number of prescriptions given, the researchers found. Though the study can't establish a cause for the increase, physicians are encouraged to keep a close eye on patients taking the drug. "Gabapentin prescription in adults with chronic low back pain is associated with increased risk of dementia and cognitive impairment, particularly in non-elderly adults," write the researchers in their published paper. "Physicians should monitor cognitive outcomes in patients prescribed gabapentin." Sold under brand names including Neurontin, gabapentin has proved to be less addictive than opioids, making it more likely to be prescribed in recent years. The drug does have some known side effects though, including extreme moods and allergic reactions. This isn't the first time researchers have examined associations between gabapentin and dementia, but previous studies haven't agreed on whether or not concerns are warranted. One of the study's strengths is the relatively large sample size of its participants, though the sample largely consisted of just one group of people – those with chronic lower back pain. A study published in 1997 found no link between gabapentin and cognitive decline in people with epilepsy, so it's important to continue to widen the data set. These conflicting results could suggest unique mechanisms among patients with the type of backpain that leads to a gabapentin prescription that also increases their risk of dementia, like a certain type of location of inflammation. But gabapentin works by dampening some of the brain's key communication channels, in order to provide relief from pain or make seizures less likely. So the worry is that it could also be damaging links between neurons in ways that might lead to dementia – a concern backed up by this latest study. Dementia is a challenging condition to study with so many potential factors to account for, but each study gets us closer to the full picture of how the brain breaks down over time. "We hope the current study promotes further research to delineate whether gabapentin plays a causal role in the development of dementia and the underlying mechanisms of this relationship," write the researchers. The research has been published in Regional Anesthesia & Pain Medicine.
And just when you thought there was no more: This Popular Zero-Calorie Sweetener Could Impair Brain Blood Vessel Cells, Study Suggests https://studyfinds.org/erythritol-d...er-damaging-your-brains-blood-vessels-stroke/ Lab Study Raises Concerns That Sugar Substitute Erythritol May Raise Risk Of Stroke In a Nutshell Erythritol, found in many sugar-free drinks, was tested on human brain blood vessel cells in the lab. The sweetener increased cellular stress and disrupted key protective pathways. These changes are known risk factors for stroke — but the study was short-term and done in cells only. Researchers say more human research is needed to understand real-world health effects. BOULDER, Colo. — That zero-calorie sweetener making your morning coffee taste just right might be quietly interfering with the tiny blood vessels in your brain — at least in a petri dish. A new laboratory study has found that erythritol, one of the most widely used artificial sweeteners, adversely affects the function of human brain blood vessel cells at levels similar to drinking just one can of diet soda. Researchers from the University of Colorado-Boulder discovered that erythritol triggers a cascade of cellular changes that could theoretically raise stroke risk: ramping up harmful oxidative stress inside cells, disrupting protective nitric oxide pathways, and blunting the brain’s natural clot-busting abilities. The team used concentrations of erythritol that match what someone would have in their bloodstream after consuming about 30 grams of the sweetener, which is roughly the amount in a standard artificially sweetened drink. It’s the same kind millions of people reach for daily, believing they’re making a healthier choice because it says “diet” or “sugar-free.” Erythritol’s popularity has surged over the past decade as consumers and food companies search for sugar alternatives that don’t spike blood sugar levels. Found in everything from sugar-free gum and protein bars to energy drinks and low-calorie sodas, erythritol occurs naturally in some fruits but is now produced industrially for commercial use. The U.S. Food and Drug Administration approved it in 2001, and it’s marketed as a nearly ideal sugar substitute: it tastes about 60–80% as sweet as sugar, provides virtually no calories, and is generally considered safe for people with diabetes. How Erythritol Alters Brain Vessel Cells Researchers from the University of Colorado Boulder focused on human brain microvascular endothelial cells. These are specialized cells that line the tiny blood vessels in the brain. They are vital gatekeepers of the blood-brain barrier, regulating blood flow and blocking harmful substances from reaching brain tissue. In the experiment, the team exposed these cells to a 6 millimolar (mM) concentration of erythritol for three hours — a dose that mimics typical human blood levels after consuming about 30 grams of the sweetener. The results were striking: erythritol increased the production of reactive oxygen species (ROS) — a form of harmful cellular stress — by about 75%. It also disrupted the cells’ ability to produce nitric oxide, a protective molecule that keeps blood vessels open and healthy. Nitric oxide production dropped by around 20% in the erythritol-treated cells. At the same time, levels of endothelin-1 (a powerful blood vessel constrictor) rose by about 30%. Tight regulation of blood vessel diameter is especially crucial in the brain, where steady blood flow is needed to keep neurons alive. Perhaps most concerning was erythritol’s impact on the brain’s natural clot-busting system. When the researchers exposed the cells to thrombin, a protein that normally triggers the release of tissue plasminogen activator (t-PA) to dissolve clots, the untreated cells boosted their t-PA release by about 25%. But the erythritol-treated cells failed to respond at all. A Recipe for Stroke? The authors note that these cellular changes represent “central characteristics of cerebral vascular endothelial dysfunction and causative factors in the development, severity, and outcome of ischemic stroke.” Ischemic stroke — which happens when a clot blocks blood flow to part of the brain — accounts for nearly 87% of all strokes. The combination of increased cellular stress, reduced nitric oxide, elevated endothelin-1, and impaired clot-busting ability could, in theory, create conditions that increase the risk of these dangerous blockages. Researchers point out that brain blood vessels are especially vulnerable to this kind of damage because they contain large numbers of mitochondria, the tiny energy factories inside cells that are particularly sensitive to oxidative stress. Is It Time To Substitute Sugar Subtitutes? These results, published in the Journal of Applied Physiology, are noteworthy given how common erythritol is and the mounting evidence linking it to cardiovascular issues. Recent large-scale studies have found that people with elevated blood levels of erythritol had a higher risk of heart attacks and strokes over three years. A small follow-up trial showed that consuming 30 grams of erythritol significantly increased platelet activity and clotting potential in healthy volunteers. Unlike some cell studies that use unrealistically high doses, this research used erythritol levels that millions of people can realistically reach through normal consumption of sugar-free foods and drinks. Still, the researchers acknowledge that the study has important limitations: it was conducted in isolated cells over a short period and does not prove that consuming erythritol causes strokes in real people. However, the cellular pathways they identified have been linked to stroke risk in other studies and provide a plausible mechanism worth investigating further. Rethinking Erythritol Erythritol’s rise from a niche ingredient to a mainstream sugar substitute reflects a broader trend: as obesity rates rise and more people try to manage diabetes, artificial sweeteners have become go-to products for cutting calories without giving up sweetness. Marketing often highlights the positives, noting that erythritol is “natural,” low-calorie, and doesn’t upset the gut the way other sugar substitutes can. But emerging research on its potential cardiovascular and cerebrovascular effects receives far less attention. For now, this new evidence suggests that while erythritol may still have a place for people managing diabetes or weight, it may not be the entirely risk-free alternative it’s sometimes made out to be. Instead of searching for the perfect artificial sugar substitute, many health experts argue that training our palates to crave less sweetness overall — from any source — could be a healthier long-term strategy. Disclaimer: This report summarizes the findings of an in vitro (lab-based) study. The research did not test erythritol’s effects in living humans, so it does not prove that consuming erythritol causes stroke or other health problems. Always consult qualified health professionals for advice about your diet and health choices. Paper Summary Methodology Researchers cultured human brain blood vessel cells and treated them with erythritol at levels equivalent to consuming 30 grams (about one artificially sweetened beverage) for 3-24 hours. They measured cellular stress markers, protective compound production, and clot-fighting responses. The study used five experimental units and employed standard cell culture techniques with appropriate controls. Results Erythritol treatment caused a 75% increase in harmful cellular stress and reduced protective nitric oxide production by 20%. The sweetener increased blood vessel constrictor production by 30% and completely blocked the normal clot-fighting response. While cells attempted to compensate by increasing protective proteins, this wasn’t sufficient to prevent overall cellular damage. Limitations This was a laboratory study using isolated brain cells over short time periods, so results may not directly translate to whole-body effects in living humans. Researchers couldn’t assess long-term exposure effects and didn’t test other artificial sweeteners for comparison. The study also couldn’t determine if cellular changes would reverse after erythritol exposure ended. Funding and Disclosures The research was supported in part by American Heart Association award 24TPA1301309. The authors declared no conflicts of interest. Publication Information “The non-nutritive sweetener erythritol adversely affects brain microvascular endothelial cell function” was published in the Journal of Applied Physiology, Volume 138, pages 1571-1577, 2025. First published online June 3, 2025, DOI: 10.1152/japplphysiol.00276.2025
Wow, even erythritol, a simple sugar alcohol? Damn, I didn't see that one coming. I have a bag of the stuff somewhere in my pantry. I guess there's no rush to start using it.