The Link Between Probiotics and Heart Health: A Growing Connection, by Extension Intern Mami Okada

Probiotics are widely recognized for their ability to support digestive health, but emerging research suggests that they may offer additional benefits, particularly when it comes to heart health. These beneficial bacteria not only help maintain a balanced gut microbiome, but they may also have a positive influence on cardiovascular function.¹ With heart disease being a leading cause of health issues worldwide, understanding the potential role of probiotics in supporting heart health is becoming increasingly important. Let’s explore how probiotics can impact your heart and why maintaining gut health matters for your overall well-being.

What Are Probiotics?

Probiotics are live microorganisms, often referred to as “good bacteria,” that provide health benefits when consumed in sufficient quantities. They help restore balance to the gut microbiome, promote better digestion, and support the immune system.² Some of the most common probiotic strains, such as Lactobacillus and Bifidobacterium, are found in fermented foods like yogurt, kefir, kimchi, and sauerkraut.²

Gut Health and Heart Health

Research is beginning to uncover the connection between gut health and cardiovascular health, often called the “gut-heart axis.” When gut bacteria are out of balance, harmful bacteria can trigger inflammation throughout the body, which is a major risk factor for heart disease. Probiotics help restore balance in the gut, potentially reducing inflammation and promoting heart health.¹ Additionally, a balanced microbiome may influence critical cardiovascular factors, such as cholesterol levels, blood pressure, and blood vessel health.¹

Probiotics and Cholesterol

Studies have shown that specific probiotic strains can help lower LDL (“bad”) cholesterol levels by reducing cholesterol absorption in the intestines and promoting its excretion.¹ This reduction in LDL cholesterol and potential increase in HDL (“good”) cholesterol can help prevent plaque buildup in the arteries, reducing the risk of heart disease.¹

Probiotics and Blood Pressure

Probiotics may also have a positive effect on blood pressure.¹ Microorganisms like Enterococcus faecalis, have been linked to modest reductions in blood pressure, which is especially important for individuals with hypertension.¹ Lowering blood pressure can help protect blood vessels, reducing the risk of heart disease and stroke.

The Need for More Research

While the early findings on probiotics and heart health are promising, more research is needed to fully understand the extent of their impact on cardiovascular health.¹ Current studies are still in their early stages, and scientists are working to determine which probiotic strains, doses, and mechanisms are most effective in improving heart health.¹

Conclusion

Incorporating probiotics into your diet may offer a simple yet effective way to support both your gut and heart health. While more research is needed to confirm the exact benefits, early studies show a promising connection between a healthy gut and a healthy heart. By adding probiotic-rich foods like yogurt, kefir, kimchi, and sauerkraut to your meals, you may be taking an important step toward better cardiovascular health. Always consult with your healthcare provider before making significant changes to your diet or supplement regimen.

1. Murthur L, Malik S, Ganti L. Benefits of Probiotics on Cardiovascular Health – A Narrative Review. Health Psychology Research. 2024; 12. doi:52965/​001c.123856
2. Probiotics: Usefulness and Safety. National Center for Complementary and Integrative Health. Updated Aug 2019. Accessed Feb 13, 2025. Probiotics: Usefulness and Safety | NCCIH

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