Mouthwash, Nitrous Oxide and High Blood Pressure

Published By Dr. Rachel Hall at 8 October, 2025

The Unexpected Link Between Mouthwash Use and High Blood Pressure

While it might seem unlikely, there’s growing evidence suggesting a connection between mouthwash use, nitrous oxide exposure, and increased blood pressure. This connection revolves around the role of oral bacteria in producing nitric oxide, a vital molecule for regulating blood pressure.  

The Role of Nitric Oxide

Nitric oxide (NO) is a gas produced by various cells in the body, including those in the lining of the blood vessels. It plays a crucial role in dilating blood vessels, reducing blood pressure. Some oral bacteria are capable of converting nitrates from our diet into NO, contributing to healthy blood pressure levels.  

Mouthwash and Nitric Oxide Production Link To High Blood Pressure

Many mouthwashes contain antibacterial agents, particularly chlorhexidine or cetylpyridinium chloride that can kill harmful and beneficial bacteria. Unfortunately, some of these beneficial bacteria are the ones involved in NO production. By reducing the population of these bacteria, mouthwash use could potentially disrupt the body’s natural production of nitric oxide.  

The Potential Risks of Using Mouthwashes – High Blood Pressure

While more research is needed to fully understand the extent of the connection, studies have suggested that regular mouthwash use, especially those containing the antibacterial agents chlorhexidine or cetylpyridinium chloride could be associated with slightly elevated blood pressure. This risk might be exacerbated in individuals who also use nitrous oxide.  

What Can You Do To Maintain Healthy Nitric Oxide Levels?

If you have concerns about your blood pressure or are a regular mouthwash user, it’s advisable to consult with a healthcare professional. They can assess your individual risk factors and provide personalised advice.

In the meantime, consider these steps:

• Limit mouthwash use: If possible, reduce the frequency of mouthwash use or opt for products without antibacterial agents. Avoid those mouthwashes containing chlorhexidine or cetylpyridinium chloride as these are the ones that are most likely to reduce nitric oxide levels.
• Maintain good oral hygiene: Brush and floss regularly to keep your teeth and gums healthy without relying solely on mouthwash.   

How to Increase Nitric Oxide Production Naturally

Nitric oxide is a molecule produced naturally by the body. It plays a crucial role in various physiological processes, including blood flow, immune function, and nerve signaling. Here are some natural ways to boost nitric oxide production:  

Dietary Approaches

• Consume nitrate-rich vegetables: Foods like beets, spinach, arugula, and leafy greens are excellent sources of nitrates, which the body converts into nitric oxide.  
• Include antioxidants: Vitamins C and E, found in fruits, vegetables, and nuts, help protect nitric oxide from breakdown.  
• Limit processed foods: These often contain additives that can interfere with nitric oxide production.

Lifestyle Changes

• Regular exercise: Physical activity stimulates the production of nitric oxide, leading to improved blood flow and overall health.  
• Manage stress: Chronic stress can reduce nitric oxide levels. Relaxation techniques like meditation, yoga, or deep breathing can help.  
• Adequate sleep: Sufficient sleep is essential for optimal bodily functions, including nitric oxide production.
• Avoid excessive alcohol and smoking: These can damage blood vessels and impair nitric oxide production.  

Supplements (Consult a Healthcare Professional)

• L-citrulline: This amino acid can be converted into arginine, a precursor to nitric oxide.  
• Beetroot powder: A concentrated source of nitrates that can boost nitric oxide levels.

Remember: While these methods can be beneficial, it’s always advisable to consult with a healthcare professional before making significant changes to your diet or lifestyle, especially if you have underlying health conditions.  

By understanding the potential connection between mouthwash, nitrous oxide, and high blood pressure, individuals can make informed choices about their oral health and overall well-being.

Brisbane Holistic Dentist

Evolve Dental is your trusted partner for comprehensive dental care. Our experienced team is dedicated to providing personalised treatment plans tailored to your unique needs. From routine check-ups to complex procedures, we offer a wide range of services to ensure optimal oral health. We believe in a holistic approach to dental care, emphasising prevention and education. Our knowledgeable dentists can advise you on the best mouthwash options based on your specific oral health concerns, helping you maintain a healthy smile for years to come.

Call us today to book your appointment 07 3720 1811 or BOOK ONLINE HERE

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  Dr. Rachel Hall

  Rachel is the founder and principal dentist at Evolve Dental Healing with over 30 years experience, practising holistically since 2001. Not your typical dentist, Rachel is a passionate opinion leader, challenging convention to empower people to make better dental and health choices, helping thousands to have healthy natural smiles. A respected writer and presenter on holistic dentistry, health and wellness it is Rachel’s mission to revolutionise the way people look at their dental health.