For years, many people have believed that breakfast is the most important meal of the day. This idea has been reinforced by parents, advertisements, and even some doctors. However, recent research suggests that this belief may not be based on universal scientific evidence. The concept of breakfast as an essential meal began in the early 20th century with a marketing campaign by an American magazine run by the inventor of cornflakes. This campaign turned a commercial idea into a public health belief, even though there has never been a clear medical consensus on what breakfast should be or why it is more important than other meals. Skipping breakfast does not lead to significant hunger or energy loss for most adults, as the body adjusts later in the day. What truly matters is maintaining a balanced diet over the course of 24 hours, rather than strictly following a schedule upon waking. In France, more than half of the population still sees breakfast as essential, but this belief is not based on universal scientific truth. In fact, one in five people in France already skip breakfast daily without experiencing negative health effects. The importance of breakfast varies depending on individual factors. For children and teenagers, breakfast is still valuable for supporting growth and concentration, though it can be replaced by a snack around 10 a.m. if mornings are too hectic. For thin adults, skipping breakfast has little effect on weight, but it may be more challenging for those who are overweight. These individual differences highlight the need for personalized approaches rather than rigid rules. Research on the topic shows that people who regularly eat breakfast tend to have more balanced diets and engage in regular physical activity. This suggests that breakfast is more of an indicator of an already healthy lifestyle rather than the cause of better health. To date, no direct cause-and-effect link has been proven between skipping breakfast and weight gain. What seems most important is meeting daily energy, protein, and nutrient needs throughout the day, rather than adhering to a fixed meal schedule. Many people have found that listening to their own body's signals is more effective than following universal rules. Some now eat when they feel hungry, whether that's at 10 a.m. or later, as long as their overall daily intake meets their nutritional needs. If someone is considering skipping breakfast, they are encouraged to start with a simple experiment: observe their true hunger and fullness cues for a week before making a decision. This approach avoids pressure or guilt and allows individuals to find what works best for their own health.