Hyperphagia is an eating behavior characterized by a pattern of:1
- Intense hunger
- Increased appetite for food
- Excessive hunger and eating
It is common for a person with hyperphagia to uncontrollably consume larger quantities of food than they normally would due to the lack of normal satiety (feeling full). This differs from extreme hunger after strenuous exercise or physical activity, which often resolves after eating.2
In hyperphagia, the desire to eat never stops—even after an episode of binge eating. In fact, eating may further stimulate an unending, intense, and persistent urge to consume more food rapidly.2
Hyperphagia is, by itself, not a disease or eating disorder per the Diagnostic and Statistical Manual of Mental Health Disorders (DSM-5). However, hyperphagia usually indicates more severe health issues, such as an underlying medical condition or eating disorder.2
The reality is that hyperphagia affects people across all age groups, races, genders, body types, sexualities, and populations.
{{link-bank-two-column}}
Hyperphagia symptoms
While hyperphagia starts gradually, the signs and symptoms can be challenging to identify. They may overlap with the characteristic features of some eating disorders. Also, hyperphagia can affect people differently as the indicative underlying condition evolves.3
For these reasons, every individual with hyperphagia is unique. For some, symptoms may manifest as a strong desire to always talk about food. Still, in others, it may show up as a lack of satiety, obsession with food, or the need for reassurance of meal time.4
Some common signs of hyperphagia can include:4
- A strong desire or need to eat
- Binge eating
- Obsessing about food
- Never feeling full or satisfied
- Engaging in food-seeking behaviors
- The uncontrollable desire to eat again after a few minutes of finishing a full meal
- Eating a substantial amount of food in one sitting
What causes hyperphagia?
Hyperphagia is often caused by an underlying medical cause which may be due to several factors. These can include, but aren't limited to, blood glucose levels, hormonal imbalance, and rare diseases.1,2
Blood glucose causes of hyperphagia
It's common for people with type 1 or type 2 diabetes to report feelings of extreme hunger and overeating behavior diagnostic of hyperphagia.6 In diabetes, a lack of insulin or insulin resistance causes the blood glucose level to build up. This is because the body needs insulin to convert the glucose from food into energy, and the available blood glucose is inaccessible to body cells.6
On the other end of the spectrum, when you have low blood sugar, ghrelin—the hunger hormone - transmits signals to the brain to initiate food cravings. Episodes of hypoglycemia are most common at night and often lead to late-night hunger pangs.1
In fact, the higher your ghrelin level, the hungrier you'll get, and vice-versa. This is because the body releases ghrelin when it is starved of sugar. Apart from hyperphagia, other symptoms of hypoglycemia include rapid heartbeat, anxiety, irritability, and dizziness.1
Hormonal causes of hyperphagia
An overactive thyroid, which medical professionals call hyperthyroidism, can cause a build up of the thyroid hormone in the body. The thyroid hormone regulates the body’s metabolism, so elevated levels can lead to significant changes in the metabolism rate.7 As a result, people with hyperthyroidism use up calories faster than usual and feel hungry regularly.
PMS is a group of physical, emotional, and psychological symptoms people develop 1-2 weeks before their menstrual period. Hormonal imbalance in response to PMS alters the standard estrogen, progesterone, and serotonin levels.8
This can trigger the following symptoms:
- Intense craving for carbs and sugary foods
- Mood and emotional changes
- Indigestion
Not everyone with PMS will have hyperphagia. Symptoms may appear mild for some, while others may experience severe symptoms.
Mental health causes of hyperphagia
It's common for individuals with hyperphagia to have issues with other mental health conditions, including anxiety and depression. (9,10) While increased appetite is a significant symptom of depression, it can also be a coping mechanism to deal with the associated negative emotions.10
During chronic stress, you may notice an increased appetite or desire for a sugar, fat, or salt-rich diet. This happens because the brain interprets stress as a threat and signals the adrenal gland to release the stress hormone cortisol to fight it off.11
Scientific evidence shows that binging on such a high-carb diet can cause dopamine, the feel-good hormone, to flood the pleasure-reward centers of the brain and create a pleasant effect. This can stimulate the urge to keep eating even beyond satiety.12
Genetic causes of hyperphagia
A constant hunger drive at about two years of age is a cardinal diagnostic criterion for PWS. In people with this rare genetic condition, the part of the brain that controls appetite is affected. As such, it is not unusual for their food consumption to increase without feeling full.5
Individuals struggling with KLS may not complain of extreme hunger. But they'll usually experience episodes of compulsive hyperphagia that compel the consumption of available food, regardless of the condition, quality, or appeal to personal preferences.13
Understanding hyperphagia and eating disorders
Hyperphagia is typically not a standalone condition. It is a symptom of some eating disorders, which include binge eating disorder (BED) and bulimia nervosa (BN). Both conditions have a significant symptom in common—eating large volumes of food beyond satiety.1
While a restrictive mindset drives BED, compulsive eating may be due to several biological, genetic, or environmental factors in response to negative emotions.14,15 Having either of the two conditions can fuel the hyperphagic drive.
If you or someone you love is struggling with symptoms of an eating disorder and would like professional treatment, help is available at Within.
Get help today >