Probiotics long term use
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Long-Term Probiotic Use: Health Effects and Safety
Blood Pressure and Cardiometabolic Health
Long-term use of probiotics (defined as at least 8 weeks) has been shown to modestly lower both systolic and diastolic blood pressure, especially in people with diabetes or hypertension. However, extending the duration of probiotic use does not appear to further enhance these blood pressure-lowering effects. The benefits are more pronounced in those with existing metabolic conditions compared to healthy individuals, but the overall reduction in blood pressure is relatively small .
Glycemic Control in Type 2 Diabetes
Probiotics may help lower fasting blood glucose levels in people with type 2 diabetes, with effects seen both in the short term and after longer use (12 weeks or more). The impact on HbA1c, a marker of long-term blood sugar control, is less clear but may be more significant in those not using insulin and those with higher baseline blood glucose. Probiotics also appear to help lower cholesterol levels over time .
Cognitive Function in Older Adults
Supplementation with specific probiotic strains, such as Bifidobacterium longum BB68S, for 8 weeks has been found to improve cognitive functions in healthy older adults. Improvements were seen in memory, attention, and other cognitive domains, alongside beneficial changes in gut microbiota composition. This suggests a potential role for probiotics in supporting healthy aging and cognitive health .
Neurological and Anti-Inflammatory Effects
In animal studies, long-term probiotic supplementation has shown protective effects against seizures, reduced inflammation, and improved antioxidant status in the brain. These findings suggest that probiotics may help modulate neurological health and reduce neuroinflammation, although more research in humans is needed .
Safety Concerns and Potential Risks
While probiotics are generally considered safe for healthy individuals, long-term use can raise some concerns. Animal studies have shown that extended probiotic supplementation may trigger a systemic pro-inflammatory response and increase certain cardiovascular risk markers, even if no obvious tissue damage is observed. These findings highlight the need for monitoring potential side effects, especially with multi-strain probiotic products and in individuals using them as a preventive measure .
Experts emphasize that probiotics intended for vulnerable or patient populations should undergo rigorous safety testing, including genetic analysis to rule out harmful traits. There is a call for more consistent reporting of adverse events and for tailoring probiotic use to individual needs rather than a one-size-fits-all approach. The long-term safety of probiotics should be evaluated with standards similar to those used for other biologic therapies .
Conclusion
Long-term probiotic use can offer modest benefits for blood pressure, glycemic control, cognitive function, and possibly neurological health, particularly in people with existing health conditions. However, potential risks such as inflammation and cardiovascular changes, especially with prolonged or indiscriminate use, warrant careful consideration. Probiotic supplementation should be personalized, and ongoing safety monitoring is recommended, especially for vulnerable groups and those using multi-strain products Zhao2022Hradicka2023Kılınç2021+3 MORE.
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