Retailer’s ‘functional juices’ contain lion’s mane and reishi, supposed to help reduce stress, fatigue and anxiety

First they gave us the meal deal. Now they’re trying to help boost our brains.

Marks & Spencer’s new range of drinks containing adaptogenic mushrooms make it the first major supermarket to sell “functional juices”. From this year, you can now find “lion’s mane latte” and “reishi shots” next to Lucozade and lemonade on the soft drinks shelf.