During the combustion process of fuel materials, products are released that have been proven to adversely affect human health. Due to the nature of their work, firefighters are exposed to the harmful effects of combustion products several times more than the general population. The chemical compounds released during combustion cause a range of health issues in humans and contribute to the development of diseases in the respiratory, cardiovascular and other systems essential for normal bodily function. Besides the products released during and after the combustion process, an additional danger for firefighters is posed by the necessary protective equipment. The aim of this paper is to raise awareness among firefighters by detailing the dangers they face through the ingestion of harmful products. It is important that firefighters are properly educated and familiarized with the potential dangers of these products so that they can protect themselves properly, approach firefighting safely and thus preserve their health.