The mouthwash is a common gesture to complete oral hygiene. But according to several studies, its repeated use could have an unexpected effect: increased blood pressure. In 2020, researchers published in the journal Blood Pressure have shown that people using a mouthwash twice a day had an increased risk of hypertension.
The link between mouthwash and blood pressure
Already in 2015, a study conducted in patients over 65 with hypertension observed an aggravation after only three days of using an antibacterial mouthwash.
The mechanism in question would be linked to beneficial oral bacteria which participate in the production of nitric oxide, a compound playing a role of natural vasodilator. By eliminating these bacteria, some mouthwashes could limit this natural regulation of blood pressure. However, the results remain controversial: in 2019, a study published in Free Radical Biology and Medicine has not found any significant effect, while in 2016, researchers have not noted a tension increase in young women after three days of intensive use.
What are the most exposed profiles?
If the conclusions differ, certain population groups must remain vigilant. People with family history of hypertension or heart disease are considered to be at risk. Age, sex, obesity, diabetes, chronic kidney diseases or sleep apnea are also among the aggravating factors. The level of physical activity and daily stress can also accentuate this vulnerability.
How to use the mouthwash without danger?
It is not necessary to completely abandon the mouthwash. But for people at risk, the choice of product is essential. Bactericidal mouthwashes, especially those containing chlorhexidine gluconate, alcohol or hydrogen peroxide, can be favored. Before any decision, it is recommended to ask a doctor or a pharmacist for advice to opt for a suitable and safe solution for cardiovascular health.