Dietary fats play an important and irreplaceable role in many vital processes of our body, although they are often mentioned exclusively in a negative context. Cerebrovascular diseases belong to a large group of vascular diseases and are among the leading diseases in the world. The main representative is stroke and then atherosclerosis, and the most common role of fat in the development of cerebrovascular diseases is deposition in the walls of blood vessels. In this way, the blood vessel narrows or is the source of the embolus and the cause of distal occlusion of blood vessels. Due to the frequent disability and incapacity for work, prevention is the most important in the treatment and prevention of cerebrovascular diseases. It is nutrition that plays a key role here. The main goal of this study was to identify differences in knowledge about diet, primarily fat, in different age groups as well as their intake. The method of data collection was a web survey. The results showed that younger age groups prepare less food on their own, avoid fewer diets and consume more trans fats, while older age groups spend more time preparing food and choosing healthier foods, but do not consume enough healthy fats. The conclusion is that younger people have more information about healthy fats and their health benefits, but they consume more trans fats with industrially processed foods due to insufficient information about their presence. At the same time, older people, often due to health conditions, consume less fat in their diet and are well informed about the negative effects and less about the positive ones. They also consume less and trans fats by preparing food.