The cooperation between a patient and their physician represents a pre-requisite for successful treatment. Provided the patient is well-informed and willing to cooperate, their illness turns out to progress more slowly and, as a result, they usually live longer than the one who is not as they are more likely to take precautions against medical complications associated with it. Moreover, the quality of such a person’s life is higher and treatment less expensive. The nefrologie.eu portal aims to educate patients, their relatives and other people interested in the area of kidney diseases. Apart from the provision of information on how to prevent and alleviate kidney-related disorders, the portal conducts a perpetual needs analysis thereby ensuring it is the areas that interest patients most that are widely covered by it. In this respect, it also serves as a needs analysis tool for doctors to monitor the fields patients most frequently lack information about allowing them to pinpoint and focus on these during their sessions with their own patients. As the counseling section comprises answers to the questions (800 up to now) the visitors (more than 200 a day) have posted via the site and thus contains concrete information relevant to the individual visitors’ past, present and future lives, its educational impact is facilitated through the personalization factor. What also contributes to the efficiency of the educational process is the fact the information is presented through multiple presentation channels and thus ensures sufficient repetitions and variations on themes. The paper also discusses other principles of andragogy that appear crucial in building a publicly available electronic information source targeting medical education of adults.