The doctors investigate the role our digestive system plays in our health, Dr Sandro reveals what the contents of our gut looks like and which body functions are supported by the 40 trillion-or-so microbes that live there.

In this episode, we're helping you to fight off colds & flu. Dr Sandro reveals which home remedies work & which ones don't. Dr Shalin finds out what the difference is between colds & flu and what we can do to prevent them.

The Doctors explore our senses - Dr Shalin finds out why hearing deteriorates with age; Dr Sandro busts some myths about improving your eyesight; and Dr Renee explores the link between smell & memory.