Dr. Thomas Hering explains the reasons behind nicotine addiction and what happens o the body after you stop smoking. He also discusses whether e-cigarettes offer a real alternative. He's a specialist in pulmonary medicine and an expert on smoking cessation.

Professor Ulrich Nöth discusses hip replacement operations. Nöth is a leading surgeon at the Waldkrankenhaus hospital for orthopaedics and accident surgery in Berlin. He specializes in "Rapid Recovery” procedures.

Microbiologist Andreas Diefenbach talks about new findings on the crucial role the gut microbiome plays in maintaining health and causing sickness. It looks like it is implicated in a whole range of conditions and diseases.

Jonas Kittelmann discusses the health benefits of building up muscle. The personal trainer and sports expert gives pointers on strength training.

Dr. Marc Jansen explains when gallstone surgery is necessary, and whether the gallbladder also has to be removed. Dr. Jansen is a Chief Surgeon at the HELIOS Emil von Behring Hospital in Berlin.

Dr. Ole Goertz speaks about wound treatment and what to do if a wound grows chronic. He heads up the Plastic, Reconstructive and Aesthetic Surgery Clinic at the Martin-Luther hospital in Berlin.

We talk to an expert about the current state of Alzheimer's research. How much do we know about this disease and the way it progresses? What therapies are available? And how close are we to finding a cure?

Mirko Lorenz explains the health benefits of tai chi. A certified trainer based in Berlin, he also works with Parkinson's patients.

Dr. Tobias Pottek speaks about gender dysphoria. What options are there for people who feel their biological sex doesn't align with their true identity? How do sex changes work and what are their consequences?

Dr Julia Benckert talks about the different types of hepatitis, diagnosis, and chances of recovery from the illness. She's a senior physician in hepatology and gastroenterology at the Charité University Hospital in Berlin.