Our Welly algorithm was developed by a team of professionals based on the experience of physicians with 17 years of practice, research and work in integrative medicine. Our questions about symptoms and well-being are similar to those asked at a doctor's visit and are designed to identify the causes of ill-health. We don't work with consequences, we work with causes! The Welly algorithm has been proven by many years of experience of medical practitioners and is sufficient to select vitamins and minerals based on your individual characteristics. However, it is not a substitute for taking tests and seeing a doctor.