Have you ever finished a meal and found yourself feeling hungry again within minutes? Many people experience this, and it lets us understand the science behind why this happens. 

Hunger is a complex interplay of hormones, nutrients and physiological signals. Key hormones involved in regulating hunger are Ghrelin, also known as the hunger hormone, and Leptin, also known as the satiety hormone. Two more key players are Insulin and your hypothalamus, which is present in your brain. 

Let us look into these hormones. 

Ghrelin, as the name suggests it signals your brain when it is time to eat, and leptin signals your brain to stop eating when full. If your body does not respond properly to leptin or if the levels of ghrelin are high after eating, you may still feel hungry. 

There are other aspects where you may feel hungry.

The composition of your meal can be one factor. If your meal is lacking protein and fibre, you may feel hungry because many studies have shown that consuming high quantities of protein releases fullness hormones like glucagon-like peptide, cholecystokinin and peptide YY. 

Fibre is known for improving satiety levels. They digest slowly and make you feel full for longer. Fibre promotes the release of glucagon-like peptide and peptide YY, which are appetite-suppressing hormones. 

So make sure your diet is rich in high-protein food like lean meats, chicken, fish, eggs, paneer, tofu, pulses and legumes. And fibre-rich food like vegetables, whole grains, fruits, seeds, and beans. 

There is something called stretch receptors in our stomach which plays an important role in promoting fullness. When consuming food, these receptors detect how much your stomach can expand and send signals directly to the brain to reduce your appetite. 

Stomach receptors rely on the total volume of the food and not the nutritional composition. So if your meal volume is less than, you might feel hungry immediately after eating. You can add more volume to the meal with low-calorie foods, or drinking water before and after meals adds volume. 

In some hormone imbalance cases, like leptin resistance, people may feel hungry after eating. This is because leptin released in the body doesn’t work well. This is commonly seen in obese individuals. Leptin resistance can be reduced by setting a regular physical activity, reducing sugar intake, increasing your fibre intake and getting good quality sleep. 

Hunger is a psychological factor; your gut and brain are in constant communication. Eating while distracted or eating at a faster speed, your brain may not be able to register what you are eating, and it will not be able to send signals to stop you from eating and feel full.

Other emotional factors like stress, anxiety and lack of sleep can make your brain misinterpret signals and lead to unnecessary hunger cues. 

During sleep deprivation, your ghrelin hormone level increases while leptin decreases, making you feel hungrier than usual. Stress also triggers a craving for high-carbohydrate and high-fat food. 

So, next time you feel hungry soon after eating, consider these factors before opening a snack.