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> Compare it to physical health. For instance, everyone is advised to take regular tests (like blood tests). While things can still be improved a lot, this simple proactive measure helps detect many health problems before they cause serious damage.

Q: How many people actually take regular blood tests?

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Nearly every working person in Japan. It’s mandated by law to get a yearly checkup from your employer, and family is covered too if they don’t have their own.

Part of the (quite extensive) checkup is a blood test.

In the UK, only people on certain treatments or under non-interventional observation that require it or private patients.

Regular blood tests for normal children and adults (other than the elderly perhaps?) on a purely speculative basis are not a thing.

Edit: actually you do get a 5-yearly test after the age of 40 until 65, my mistake. This incudes a finger-prick cholesterol and blood sugar test and may incude a "real" blood test if thought necessary.

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