If we go back a hundred years, we will notice that the term allergy didn’t even exist. That’s why many doctors consider allergies a modern disease. A century ago, the air we breathe was much cleaner, the food was healthier, and medicine was based completely on natural ingredients. These are all factors that were taken into determining the cause of allergies. Now, they represent one of the most frequent health problems – more than 50 million people are suffering from various allergies.