Do I need breakfast?
Not automatically. Breakfast is useful if it improves energy, hunger control, training performance, protein intake, food quality, or daily structure. It is optional if skipping it helps adherence and does not lead to overeating later.
Breakfast is less about "starting your metabolism" and more about behavior and meal structure. A high-protein breakfast can make the rest of the day easier by reducing hunger, improving satiety, and helping distribute protein across the day. For some people, though, a later first meal is simpler and just as effective, especially if it reduces snacking or decision fatigue.
This is where intermittent fasting can be useful. Its strongest practical benefit is often not a special metabolic advantage, but a smaller eating window that makes calorie balance easier to manage. Some claims about fasting and insulin sensitivity may be relevant in certain contexts, but for most healthy people, body composition, training, sleep, food quality, and overall energy intake are usually much stronger drivers.
The main downside of skipping breakfast is that it can compress your protein and food intake into fewer meals. If you skip breakfast but struggle to hit protein, train poorly, or arrive at dinner ravenous, consider a light protein option: a shake, Greek yogurt, cottage cheese, eggs, lean meat, tofu, or another easy protein source. It does not have to be a full breakfast to solve the problem.
Judge breakfast by outcomes: appetite, calories, protein, mood, schedule, training performance, and repeatability. If eating breakfast improves those, eat it. If skipping it improves those, skip it.