Purple mouthwash combines red and blue dyes and uses colour theory to counteract yellow teeth staining. As purple is opposite yellow on the colour wheel, using a purple mouthwash can have an instant but temporary whitening effect, leaving your smile looking brighter and whiter. 

If you’ve been wondering how to use mouthwash correctly, here are some tips:
 

• Pour the correct amount into the cap. 
• Swish the mouthwash around your mouth for the time stated on the packaging (usually 30 seconds), then spit it out.
• Use mouthwash once or twice daily to freshen your mouth throughout the day or after eating, not immediately after brushing.

Some purple mouthwashes are purely cosmetic and contain no active ingredients that help to protect your teeth. The best mouthwash contains ingredients like fluoride, which helps to prevent cavities and reduce plaque bacteria. It’s a bonus if your mouthwash also has whitening ingredients to brighten your smile!