A recent advertisement of a toothpaste reminded me of adage `the more things change, the more they stay the same’. The ad was of an advance whitening toothpaste that coats teeth in shade purple while...
source https://timesofindia.indiatimes.com/blogs/randomly-elder/optically-brightening-ourselves/
source https://timesofindia.indiatimes.com/blogs/randomly-elder/optically-brightening-ourselves/