In search of a magic pill. Scientific and popular fairy tale

You had to hear phrases like this in your life: "Do this in the morning, you will be healthy", or "eat this, good for health", "Why did you buy it - it is harmful, urgently throw it away."
Try to ask such a person (or at home) - and what does it mean "useful" or "harmful"? In fact, everything is simple: useful, this is what life extends, and harmful is what life reduces. But is it possible to live longer from one eaten apple or drunk glass of water.
Because these tips come from the unshakable faith of people to a "magic tablet", which should protect from any harm.
Together with the heroes of the book, a brave hamster who wants to live a little longer and a wise snake that knows how the human body works, take part in an exciting journey and answer the question - is there a magic pill?
Spoiler: Yes, but it doesn’t look like you think