Popularised by picture-perfect Instagrammers, the clean eating aesthetic isn't accessible to many – and neither are the stores that stock organic goods. But while Whole Foods has gained a reputation as the grocery chain for wealthy health freaks, its latest venture intends to change that.

Peapod’s grocery delivery service may be favoured by young American urbanites, but its core market is senior citizens. With an inviting interface and reliable delivery, over-65s are turning to the service for locally-grown food and healthy ready meals. Can its model succeed in other ageing markets?

Everything Americans throw into their baskets and trolleys as they peruse the aisles of their local supermarket has built an industry that's worth over $600 billion. But who actually heads out to pick up the groceries and when they do it is changing. How are big chains and local mini-marts adapting?

No one wants to wait. Whether it's for a pair of shoes you need for later tonight, the latest HBO series or a mechanic to fix your dodgy exhaust. On-demand is the new norm. For taxis, there’s Uber, for takeaway, there’s Just Eat, and now, for groceries in the US, there’s Instacart.