The Guardian view on big data and insurance: knowing too much

Editorial: Insurance depends on the pooling of risk but big data may drain that pool

Weight Watchers plans tech rebrand to take on wellness industry

Under the name ‘WW’ the US-listed firm hopes to broaden its appeal as diets begin to wane

Energy drinks: why it is high time their wings should be clipped

The caffeinated, sugary drinks point to health issues such as obesity and type 2 diabetes

How the Oprah effect helped Weight Watchers regain Americans’ trust

Strategy of targeting members’ general health as well as diet boosted by its star ambassador

Holland & Barrett to offer beauty products in vegan-only shops

Retailer to take on Body Shop with test stores that will also stock bigger vegan food range

Richard Branson: ‘I’m well-behaved in real life, but misbehave atrociously in dreams’

The 68-year-old Virgin boss on sleeping in the air, family and why he never diets

When coffee isn’t enough: startups aim to bring back nap time – for a fee

Growing number of business around the world are offering spaces for people to pay to take a snooze during the day

Scottish government plans restrictions on sugary and fatty foods

Ministers’ plans to tackle obesity in some cases go further than health ministers in England

Is buying healthcare in groups the best option for small US businesses?

The labor department now allows small businesses to band together when purchasing insurance – but is it a viable option?

Inequality breeds stress and anxiety. No wonder so many Britons are suffering

In equal societies, citizens trust each other and contribute to their community. This goes into reverse in countries like ours, say Richard Wilkinson and Kate Pickett, the authors of The Inner Level