Junk food is designed to be tasty and addictive. As the classic tagline of Lays goes, "No one can eat just one". This combination usually comes with another characteristic - unhealthy.

Eating a lot of junk food has long term (and short term) consequences on our health. We put on bad weight, we grow more lethargic, we are more prone to heart (and other) diseases, we are able to exercise less, and so on.

However, there has been a growing awareness of this problem for the past several years and a lot of people have moved over from eating junk food to eating healthier foods. A lot more still continue to eat junk food, but at least there has been a positive improvement.

It is sad that healthy foods command a premium because, as Tristan Harris puts it, "Capitalism prefers to give us diabetes and then sell us lifetime subscriptions to medicines that will keep diabetes at bay so that we are back where we started than to not give us diabetes in the first place".

We are now in an age where the junk food for the mind is becoming even more of a problem than junk food for the body.

Youtube alone, gets a billion hours of viewing every day. That's every one of the two billion users (one fourth of the population of the world) spending half an hour every day on the site (most of whom are watching cat videos).

Add to that social media and Netflix and we have an epidemic on our hands.

We have started to differentiate junk food from healthy food and prioritize what to eat correctly, but we haven't yet started to do that with how we spend our time.

Now is a good time to start doing it.