There are many bases in the field of molecular biology. There is a tendency to gather databases and information in one place. This will contribute to a better transparency of knowledge, which can directly affect the quality of research papers. Also, data on the latest discoveries comes from different laboratories around the world. For this reason, it is extremely important to monitor changes and base scientific research on the latest knowledge. The paper shows ways to search for information in the most important biological databases: GenBank, UniProtKB, InterPro, PubMed and Europe PMC. Human insulin, which belongs to the insulin family, was chosen for the research topic, because many discoveries and researches are related to this family of proteins. For the search on human insulin, the UniProtKB database was chosen because it offers links to sources of information in one place, i.e. to publications in the PubMed and Europe PMC databases, which enables the achievement of the research goals, which include bibliometric analysis of publications on human insulin in the UniProtKB database and, from a bibliometric aspect, the evaluation of journals in which mentioned publications published. Analyzes at the level of publications provided insight into: the contribution of individual countries and regions in the development of knowledge about human insulin at the molecular level; authorship, co-authorship and collaboration in scientific papers on human insulin; conducted research on human insulin at the molecular level. The bibliometric analysis of scientific journals shows how to do a deeper analysis of the numerical value of the h-index, and its importance is emphasized. The research also provided information on which journals from the natural field to choose in order to progress in the scientific and academic system.