Stress And Weight

What Causes Increased Appetite

Have you ever wondered why you suddenly develop a ravenous hunger, ready to devour anything in sight? In this article, we’ll explore the fascinating world of increased appetite and uncover the various factors that can trigger it. From hormonal imbalances to psychological influences, we’ll delve into the science behind cravings and discover the root causes. So, get ready to satisfy your curiosity as we embark on a journey to unravel the mystery of what causes increased appetite.

What Causes Increased Appetite

Hormonal Factors


Ghrelin is often referred to as the “hunger hormone” because it stimulates appetite and promotes food intake. It is primarily produced in the stomach and acts on the hypothalamus in the brain to increase hunger. When ghrelin levels are high, you may experience stronger cravings and a desire to eat more. Factors that can influence ghrelin levels include inadequate sleep, stress, and certain medications.


Leptin is another hormone that plays a crucial role in regulating appetite. Produced by fat cells, leptin signals to the brain that you are full and have enough energy stored. However, when leptin levels are low or your body becomes resistant to its effects, you may experience increased appetite and have difficulty feeling satisfied after eating. Obesity and certain medical conditions can contribute to leptin resistance.


Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels. In addition to its role in metabolism, insulin also plays a role in appetite regulation. When insulin levels are disrupted or fluctuate, such as in individuals with diabetes or insulin resistance, it can lead to increased hunger and overeating.


Known as the “stress hormone,” cortisol is released by the adrenal glands in response to stress. Chronic stress can lead to consistently elevated cortisol levels, which have been associated with increased appetite and cravings for high-calorie foods. Additionally, cortisol can also impact the metabolism of macronutrients, potentially leading to weight gain and increased hunger.

Environmental Factors

Exposure to Food Cues

Our environment plays a significant role in influencing our appetite. Constant exposure to food cues, such as advertisements, food packaging, and the sight and smell of food, can trigger cravings and increase our desire to eat. This can make it challenging to resist the temptation to overeat, especially in environments where unhealthy foods are readily available.

Emotional Triggers

Emotions can have a profound impact on our appetite. Many people turn to food as a way to cope with negative emotions, such as stress, sadness, or boredom. This emotional eating can lead to overeating and weight gain. Identifying and finding alternative ways to manage emotions can help reduce the reliance on food as a source of comfort.

Stress and Lack of Sleep

Stress and lack of sleep can disrupt the delicate balance of hormones involved in appetite regulation. Chronic stress increases the production of cortisol, as mentioned earlier, which can lead to increased appetite and cravings. Similarly, insufficient sleep has been linked to hormonal imbalances, specifically affecting ghrelin and leptin levels, ultimately leading to greater hunger and a higher risk of overeating.

Medical Conditions


Hyperthyroidism is a condition in which the thyroid gland produces an excessive amount of thyroid hormones. These hormones play a significant role in regulating metabolism and appetite. When thyroid hormone levels are elevated, individuals may experience increased appetite, weight loss, and difficulty gaining weight despite eating more.


Hypoglycemia, or low blood sugar, can trigger feelings of intense hunger. When blood sugar levels drop, the body signals the brain for energy, often through cravings for high-sugar or high-carbohydrate foods. These cravings can lead to overeating and a vicious cycle of blood sugar spikes and crashes.

Prader-Willi Syndrome

Prader-Willi Syndrome (PWS) is a genetic disorder that affects appetite regulation. People with PWS have a constant and insatiable appetite, often leading to obesity and related health problems. This condition is thought to be caused by abnormalities in the hypothalamus, the area of the brain responsible for appetite control.


Diabetes is a metabolic disorder characterized by high blood sugar levels. Both type 1 and type 2 diabetes can affect appetite regulation. In type 1 diabetes, where the body does not produce insulin, feelings of hunger may be heightened due to the body’s inability to properly use glucose for energy. In type 2 diabetes, insulin resistance can disrupt the balance between hunger and fullness.

What Causes Increased Appetite



Certain antidepressant medications, such as selective serotonin reuptake inhibitors (SSRIs), can affect appetite and lead to increased hunger. While the exact mechanisms are not fully understood, it is believed that these medications alter the levels of neurotransmitters in the brain, including serotonin, which can impact appetite and cravings.


Steroids, commonly prescribed for various medical conditions, including autoimmune disorders and asthma, can increase appetite and cause weight gain. Steroids affect the function of leptin and insulin, leading to increased hunger and altered metabolism.


Antihistamines are commonly used to treat allergies and hay fever, but they can also impact appetite. Some antihistamines may have appetite-stimulating effects, leading to an increased desire to eat.

Certain Birth Control Pills

Certain types of birth control pills can affect appetite and weight. While some women may experience decreased appetite, others may notice an increase in hunger and cravings. The specific hormonal composition of the birth control pill can influence appetite regulation.

Psychological Factors

Emotional Eating

Emotional eating refers to the practice of using food as a means to cope with emotional distress or as a source of comfort. It is often driven by feelings of sadness, stress, loneliness, or boredom. Emotional eating can lead to overeating and weight gain if not effectively managed.

Binge Eating Disorder

Binge Eating Disorder (BED) is a recognized eating disorder characterized by recurrent episodes of consuming large quantities of food in a short period, accompanied by a feeling of loss of control. Individuals with BED often experience intense cravings and an Increased appetite during binge episodes.

Depression and Anxiety

Depression and anxiety can have complex relationships with appetite. Some individuals may experience a loss of appetite, leading to unintentional weight loss, while others may turn to food as a source of comfort and experience increased appetite. The relationship between mental health and appetite is highly individualized and can be influenced by various factors.

Lack of Physical Activity

Sedentary Lifestyle

A sedentary lifestyle, characterized by a lack of physical activity, can contribute to increased appetite. When you engage in minimal physical exertion, your body’s energy needs decrease, and the natural hunger and fullness cues may become disrupted, leading to a heightened appetite.

Reduced Metabolism

Regular physical activity helps maintain a healthy metabolism, which can aid in appetite regulation. When physical activity levels decrease, metabolism slows down, making it more challenging for your body to efficiently use and burn calories. This reduced metabolism can result in an increase in appetite as the body seeks to compensate for the lack of energy expenditure.


Confusion between Thirst and Hunger

Dehydration can often be mistaken for hunger, leading to unnecessary snacking and increased calorie intake. Our bodies can misinterpret thirst signals as hunger signals, causing us to eat when we actually need fluids. It is crucial to prioritize staying hydrated throughout the day to avoid this confusion and unnecessary calorie consumption.

Dry Mouth

Dry mouth, a common symptom of dehydration, can also contribute to increased appetite. When the mouth becomes dry, it can increase the desire to eat or snack as a way to alleviate the discomfort. Ensuring adequate hydration can help prevent dry mouth and reduce the urge to eat simply due to discomfort.


Hormonal Changes

During pregnancy, hormonal changes can significantly impact appetite. The increase in various hormones, such as estrogen and progesterone, can lead to fluctuations in hunger levels. Many pregnant individuals experience increased appetite and cravings, particularly for certain foods.

Increased Nutrient Requirement

Pregnancy requires additional nutrients to support the growth and development of the baby. This increased nutrient requirement can lead to an increased appetite as the body seeks to obtain the necessary macronutrients and micronutrients for both the mother and the fetus.


Decreased Metabolism

As we age, our metabolism naturally slows down. This decrease in metabolism can result in reduced calorie needs and an increased tendency to gain weight. With a slower metabolism, it can be easier to consume more calories than the body requires, leading to an increase in appetite and potential weight gain.

Reduced Sensitivity to Satiety Signals

Older adults may experience a reduced sensitivity to satiety signals, meaning it may take longer for them to feel full after a meal. This can result in an increased appetite and a higher risk of overeating. It is important for older individuals to be mindful of portion sizes and make nutritious choices to ensure they are meeting their nutritional needs without overeating.

Nutritional Deficiencies

Protein Deficiency

A deficiency in dietary protein can disrupt appetite regulation. Protein plays a crucial role in promoting satiety and regulating hunger hormones. When protein intake is inadequate, it can lead to increased appetite and a higher likelihood of overeating in an attempt to meet the body’s protein needs.

Vitamin and Mineral Deficiencies

Various vitamins and minerals are involved in appetite regulation, metabolism, and overall health. Deficiencies in nutrients such as vitamin D, vitamin B12, iron, or magnesium can disrupt normal hunger and satiety signals, leading to increased appetite and potential weight gain. Maintaining a well-balanced diet that includes a variety of nutrient-dense foods is essential to prevent deficiencies and support healthy appetite regulation.

In conclusion, increased appetite can stem from a variety of factors, including hormonal imbalances, environmental influences, medical conditions, medications, psychological factors, lack of physical activity, dehydration, pregnancy, aging, and nutritional deficiencies. Understanding and addressing these factors can help manage appetite and promote overall health and well-being. It is essential to consult with healthcare professionals for personalized advice and guidance in managing appetite-related concerns.