It will combine online, print, experiential and in-store activity to promote its mouth-care brands which include Aquafresh, Macleans, Sensodyne and Corsodyl.
The company said the campaign covers almost all aspects of mouth care and supports GSK brands.
It aims to educate consumers about the mouth and the role of each brand. Love your mouth first launched last summer.
The FMCG firm has an annual TV spend of over £23m across its oral care brands.