When people used the special mouthwash, their blood pressure went up within one day and stayed higher for the whole week they used it.

The blood pressure increase from using the special mouthwash was the same whether measured at the doctor's office, at home, or with a 24-hour monitor.

When people start using mouthwash that kills mouth bacteria, their blood pressure can go up within just one day.

When mouth bacteria are disrupted, blood pressure goes up regardless of how it's measured - whether at the doctor's office, at home, or with a 24-hour monitor.

Even when people ate a diet low in nitrate, using the special mouthwash still increased their blood pressure, which suggests the effect comes from the body's own nitrate recycling process.

The blood pressure increase from using the special mouthwash happened both during the day and at night, with the diastolic pressure going up more during the day.