When we are not healthy, we often feel a sense of guilt. We analyse what could be the cause of our discomfort, perhaps what we have eaten, or we have not done something right. The answer could be that we have forgotten to do good prevention. In fact, by the time we realise a certain problem, it is already too late. It would be better if we thought about it a moment earlier, precisely prevention. So this is what iridology can be used for. By analysing the iris one can understand, in some cases, the cause of the discomfort or get an idea of the general state of psychophysical health. This book will give you an idea of the potential of this type of investigation. But not only that, in this book I have collected many lesser-known stories, anecdotes and curiosities about health. It is neither a history book nor a handbook of natural remedies, but an attempt to shed some light on unconventional medicine and make some suggestions. How many mysteries auricolo-therapy and acupressure still hide. What about longevity?