Increasingly urbanised locations mean increasingly toxic environments for our skin. In the UK, more and more people are going organic in response. Combined with the renewed interest in wellness, sales of organic health and beauty products in Britain were up 21.6% over 2015.

From the latest juice cleanse to a green tea detox, the global appetite for health is all the rage, with the wellness industry expected to reach $70 billion by 2020. And China, one of the most health-conscious countries in the world, has become the largest market for healthy eating.

The green juice craze has taken off in recent years, earning endorsements from celebrities and wellness gurus alike. But does the hype match the health benefits? Health app Lifesum hopes to prove it can – it's used big data from 30,000 users to blend a juice tailored specifically to Londoners.

As people increasingly value products that not only prevent ill health, but also promote happier lifestyles, the global wellness industry has grown to be worth $3.4 trillion. Canvas8 spoke with consumer psychologist and brand consultant Dr. Paul Marsden to find out how brands are selling happiness.