I've had the £299 scan that could save you from an early death. Does it work?

The idea that prevention is better than cure is not a new one. But the combination of data and AI could make these health checks accessible to a wider public.

How much difference could it make?

Some experts are skeptical about the usefulness of annual scans like Neko's, saying they could force people and health systems into expensive and unnecessary follow-up tests – a trend known as overdiagnosis.

Silicon Valley is home to numerous examples of visionaries who wanted to revolutionize healthcare. However, most of these attempts have failed. Technology has a poor track record in medicine and tends to drive up prices rather than save money.

One also wonders whether the £299 price of a scan might rise if Neko has a number of regular customers who have stored their health data with the company for years. Spotify – Ek's more famous company – has repeatedly increased prices in recent years.

However, demand is huge. When Neko opened its first store in Stockholm, spaces were sold out within two hours and the company currently has a waiting list of 22,000 people.

Nilsonne is convinced that people will pay even in the UK, which is dominated by the NHS. He points out that the privatisation of medicine is more widespread in the UK than in Sweden.

Whether people will come back is another question.

A scan may be something new, coming back every year may be less common. The paradox of preventative healthcare is that while we hope not to get sick, a clean bill of health can feel like a waste of money.

The results suggest that at least early adopters are coming back. Nilsonne says 80 percent of those who came in for a scan made a follow-up appointment for the next year.

Should I go back? As the doctor's finger hovers over the booking screen, I hesitate, telling myself I'll decide at a later date.

But as the scan's cholesterol readings and energy warnings raced through my mind, I at least skipped the chocolate bar on the menu I had bought that day before dragging myself to the gym.