The only thing you need to do in order to claim a free sample of Regenerate Toothpaste is say to your Amazon Alexa or Google Assistant "Ask Send Me a Sample for Regenerate toothpaste." But please bear in mind that this free sample is available for the UK residents only.
Free Regenerate toothpaste sample (10,000 samples). Promotional Dates: 12.11.2019 – 12.12.2019. The campaign will last until all 10,000 samples have been claimed.