Someone is losing weight rapidly.
They eat very little.
Their list of acceptable foods is getting smaller.
Friends and family are desperately encouraging them to eat, but meals increasingly become a source of anxiety.
The obvious conclusion might be:
“Is this anorexia?”
But not necessarily.
Another eating disorder called Avoidant/Restrictive Food Intake Disorder (ARFID) can also lead to severe food restriction, malnutrition and dangerously low body weight.
From the outside, ARFID and anorexia nervosa can sometimes look remarkably similar.
Inside the person’s mind, however, something very different may be happening.
The simplest distinction is this:
In anorexia nervosa, restriction is characteristically connected to concerns about weight, shape and gaining weight.
In ARFID, food is restricted for reasons other than a desire to lose weight or change body shape.
That distinction is crucial because although both conditions can become medically serious, they may require quite different psychological approaches.
What is ARFID?
ARFID stands for Avoidant/Restrictive Food Intake Disorder.
A person with ARFID restricts the amount or variety of food they eat to such an extent that it can affect their weight, nutrition, physical health or everyday functioning.
But importantly, the restriction isn’t driven by body-image concerns.
The person isn’t avoiding food because they want to be thinner.
They may actually desperately want to gain weight.
They may look at their increasingly thin body and feel frightened rather than pleased.
They may understand perfectly well that they need more nutrition.
And yet eating can still feel extraordinarily difficult.
That’s one of the most confusing things about ARFID for families:
Wanting to eat and being able to eat are not necessarily the same thing.
What is anorexia nervosa?
Anorexia nervosa also involves restriction of food intake and can result in significantly low body weight.
However, the psychological process is different.
A person with anorexia typically experiences an intense fear of gaining weight or becoming fat, or persistent behaviour that interferes with weight gain.
Body weight and shape can have an excessive influence on how the person evaluates themselves, and there may be disturbance in how their body weight or shape is experienced.
Someone may therefore continue restricting food despite already being significantly underweight.
They may perceive their body very differently from the way other people see it.
The restriction itself can feel purposeful:
“I mustn’t gain weight.”
With ARFID, the internal experience might instead be:
“I want to eat, but I can’t make myself do it.”
ARFID vs anorexia at a glance
| ARFID | Anorexia nervosa | |
|---|---|---|
| Food restriction | Yes | Yes |
| Significant weight loss possible | Yes | Yes |
| Malnutrition possible | Yes | Yes |
| Medical complications possible | Yes | Yes |
| Fear of gaining weight | Not the reason for restriction | Common/core feature |
| Body-image disturbance | Not what drives restriction | Common/core feature |
| Fear of choking/vomiting | Can be prominent | Not usually the central mechanism |
| Sensory problems with food | Can be prominent | Not usually the central mechanism |
| Low appetite/interest in food | Can be prominent | May occur, but does not define anorexia |
| Wants to gain weight | May genuinely want to | Often fears or resists weight gain |
| Avoidance based on texture/smell/taste | Common in some presentations | Less characteristic |
The most useful question isn’t simply:
“How much are they eating?”
It is:
“Why aren’t they eating?”
The three common ARFID patterns
ARFID doesn’t look the same in everybody.
There are three broad reasons people may restrict food, and they can overlap.
1. Fear of something bad happening when they eat
For some people, eating becomes associated with danger.
They may fear:
- choking
- vomiting
- diarrhoea
- allergic reactions
- stomach pain
- nausea
- becoming ill
- difficulty swallowing
Sometimes there has been a frightening event.
Perhaps they choked on something.
Perhaps they became violently sick after eating.
Perhaps they experienced severe gastrointestinal symptoms.
The brain learns:
Food = danger.
Avoidance then reduces anxiety.
Unfortunately, that relief reinforces the avoidance.
The person learns:
“I didn’t eat it and nothing bad happened. Avoiding it kept me safe.”
The list of safe foods can gradually become smaller.
This is a very familiar CBT cycle.
Fear → avoidance → immediate relief → stronger fear → more avoidance.
2. Sensory sensitivity
For other people, food itself can be overwhelming.
Texture may be particularly important.
Foods may feel:
- slimy
- lumpy
- stringy
- crunchy
- mushy
- gritty
- too mixed together
Smell, appearance, temperature or taste can also matter.
This is far more than simply preferring chips to broccoli.
The sensory response can be intense enough to cause gagging, nausea, disgust or panic.
Someone may therefore have a small collection of foods that feel predictable and safe.
This presentation is sometimes seen alongside autism or other sensory sensitivities, although ARFID certainly isn’t limited to autistic people.
3. Very little interest in food
The third pattern looks quite different.
Some people simply experience very little hunger or interest in eating.
Food doesn’t provide much reward.
They forget meals.
They become full extremely quickly.
Eating feels like a chore.
They may understand intellectually that their body needs food but struggle to generate enough motivation to eat it.
Imagine having to complete an unpleasant household task three or four times every day.
That can be roughly how eating feels to somebody with very low interest in food.
Why ARFID can look irrational from the outside
One of the most baffling features of ARFID is that food rules don’t necessarily make nutritional sense.
Someone might happily eat pasta in a creamy sauce but panic when offered toast.
They might eat chicken but refuse bread.
They might tolerate one particular brand of yoghurt but not another.
They may eat something one day and feel unable to face it the next.
Families naturally think:
“But if you can eat that, surely you can eat this?”
Unfortunately, anxiety doesn’t operate according to nutritional logic.
The brain categorises experiences according to perceived safety.
One food might have become established as safe, familiar and predictable.
Another may be associated with uncertainty.
That uncertainty itself can trigger anxiety.
The person’s reaction can therefore seem completely inconsistent from the outside while making emotional sense inside their fear system.
ARFID isn’t just picky eating
This is an important distinction.
Many people have strong food preferences.
Children in particular can go through phases of eating a remarkably narrow repertoire without having an eating disorder.
ARFID becomes clinically significant when restriction leads to consequences such as:
- significant weight loss
- failure to gain weight or grow as expected in children
- significant nutritional deficiency
- reliance on nutritional supplements or tube feeding
- substantial interference with everyday or social functioning
Someone might stop eating in restaurants.
They may avoid holidays because they don’t know what food will be available.
Family meals become difficult.
Social events revolve around food anxiety.
Their physical health may deteriorate.
At that point we’re dealing with something very different from ordinary fussiness.
ARFID can occur at any weight
Another misconception is that somebody has to be extremely thin to have ARFID.
They don’t.
ARFID can occur across the weight spectrum.
Somebody may be consuming sufficient calories to maintain their weight while eating such a restricted range of foods that they develop nutritional deficiencies.
For example, a person could consume large quantities of a handful of calorie-dense safe foods and still have ARFID.
Weight alone therefore cannot tell us whether the disorder is present.
Can adults develop ARFID?
Yes.
ARFID is sometimes thought of as a childhood disorder because it commonly begins earlier in life.
But adults can have ARFID too.
Some will have had restrictive eating patterns since childhood without ever receiving a diagnosis.
Others may develop significant restriction following an event such as choking, vomiting, illness or another frightening experience involving food.
An adult may therefore find themselves saying:
“I’ve never cared about being thin. I actually want to put weight on. I just can’t eat.”
That should immediately make us think beyond traditional assumptions about eating disorders.
Anxiety and ARFID
Anxiety can play a huge role.
Imagine somebody eats toast and subsequently feels nauseated.
The next morning they remember it.
“What if it makes me ill again?”
They feel anxious.
Anxiety itself creates physical sensations:
- nausea
- dry mouth
- tight throat
- butterflies
- stomach discomfort
- difficulty swallowing
The person interprets those sensations as confirmation:
“See? My body can’t tolerate this.”
So they stop eating.
Anxiety falls.
And the brain learns that avoidance worked.
Next time the fear is stronger.
This is how a single unpleasant experience can potentially become a self-reinforcing pattern.
The vicious cycle of eating less
Unfortunately, restriction can create another problem.
The less somebody eats, the harder eating can sometimes become.
Appetite may change.
Digestion can become uncomfortable.
Constipation or bloating may develop.
The person may feel full quickly.
Eating a larger amount can feel physically unpleasant.
That discomfort can then strengthen their belief that eating is dangerous or intolerable.
Psychological and physical factors begin feeding each other.
This is why simply saying:
“You need to eat more.”
may be completely accurate medically while being insufficient psychologically.
The person may already know that.
They need help with what is stopping them from eating more.
Can somebody have both ARFID and anorexia?
Assessment isn’t always neat.
People are complicated.
Someone may initially restrict because of sensory issues or fear of vomiting and later become concerned about weight.
Another person may have several different eating difficulties.
This is one reason proper specialist assessment matters.
Clinicians need to explore:
- what the person actually eats
- how much they eat
- recent weight changes
- physical symptoms
- nutritional deficiencies
- attitudes towards weight gain
- body image
- fear foods
- sensory sensitivities
- fear of vomiting or choking
- appetite and hunger
- anxiety
- depression
- autism or ADHD where relevant
- gastrointestinal and other medical conditions
- medications
- swallowing difficulties
The diagnosis shouldn’t be made simply by looking at someone’s body.
Does someone with ARFID know they’re too thin?
They may.
This is another striking difference from some presentations of anorexia.
Someone with ARFID may look in the mirror and think:
“I look terribly thin. I need to gain weight.”
They may become frightened when they see the number on the scales falling.
They may desperately want to regain weight.
But putting a plate of unfamiliar or feared food in front of them still produces overwhelming anxiety.
This can be incredibly distressing.
The rational mind says:
Eat.
The fear system says:
Don’t.
And fear can win.
Why families can become frustrated
ARFID can be exhausting for everybody involved.
Family members see someone becoming thinner.
They become frightened.
Naturally, they start encouraging them:
“Just have another mouthful.”
“You need to eat.”
“Try some toast.”
“What about a sandwich?”
“You ate it last week.”
The more frightened the family becomes, the more pressure enters mealtimes.
The person with ARFID feels watched.
Their anxiety increases.
Their appetite disappears further.
Everyone becomes distressed.
Food turns into a battleground.
This doesn’t mean families shouldn’t encourage nutrition.
But pressure and panic can sometimes intensify the very anxiety preventing eating.
A calmer, structured approach is usually more useful.
How is ARFID treated?
Treatment depends upon what is driving the restriction and how medically compromised the person has become.
It may involve a multidisciplinary team including:
- doctors
- eating-disorder specialists
- psychologists or therapists
- dietitians
- psychiatrists
- occupational therapists
- speech and language therapists where swallowing is involved
Psychological treatment may involve CBT approaches designed specifically for ARFID.
The aim isn’t simply:
“Make the person eat.”
Treatment may involve gradually increasing food variety or volume, understanding feared consequences, reducing avoidance, addressing sensory sensitivities, improving nutritional intake and helping the person learn that uncomfortable sensations or anxiety can be tolerated.
Gradual exposure can be important
If fear is maintaining restriction, forcing somebody immediately to eat a terrifying food may backfire.
Instead, treatment may use graded exposure.
Imagine someone fears yoghurt.
A hierarchy might involve:
- Having the yoghurt container on the table.
- Opening it.
- Smelling it.
- Touching a tiny amount.
- Putting a tiny amount on the tongue.
- Eating a quarter of a teaspoon.
- Eating a teaspoon.
- Gradually increasing the quantity.
The precise steps will depend on the person.
The principle is:
Approach rather than avoid, but make the steps manageable enough to repeat.
Repeated safe experiences help the brain update its prediction.
“Perhaps this isn’t as dangerous as I thought.”
Treatment for anorexia has a different emphasis
There can certainly be overlap in treatment, particularly where nutritional rehabilitation and restoring physical health are concerned.
But psychological treatment for anorexia needs to address factors that may include:
- fear of weight gain
- restrictive rules around food
- body-image disturbance
- overvaluation of weight and shape
- compulsive exercise
- perfectionism
- rigid thinking
- self-esteem
- emotional regulation
With ARFID, challenging somebody’s beliefs about being “fat” would make little sense if they don’t have those beliefs in the first place.
This is exactly why getting the diagnosis right matters.
When low weight becomes medically urgent
Whether restriction is caused by ARFID, anorexia, depression, physical illness or something else, significant weight loss requires medical assessment.
The body doesn’t care why it is being deprived of adequate nutrition.
Severe malnutrition can affect:
- the heart
- blood pressure
- electrolytes
- muscles
- bones
- hormones
- immunity
- cognition
- energy levels
- temperature regulation
- kidney function
Someone who is fainting, extremely weak, confused, dehydrated, experiencing chest pain or palpitations, unable to maintain adequate food or fluid intake, or deteriorating rapidly needs urgent medical assessment.
There is another important reason not to suddenly push large amounts of food into somebody who has been severely malnourished.
Refeeding syndrome is a potentially serious metabolic complication that can occur when nutrition is reintroduced after substantial undernutrition.
People at significant risk need medically supervised nutritional rehabilitation.
The question underneath the eating
When somebody isn’t eating, it is tempting to focus entirely on the food.
How many calories?
How many kilograms?
What did they eat today?
Those things matter enormously, particularly when physical health is deteriorating.
But psychologically we also need to ask:
What does eating mean to this person?
For somebody with anorexia:
“Eating means gaining weight, and gaining weight terrifies me.”
For somebody with fear-based ARFID:
“Eating means I might choke, vomit or become ill.”
For somebody with sensory ARFID:
“This texture feels unbearable.”
For somebody with low-interest ARFID:
“I simply don’t feel hungry and eating feels exhausting.”
The visible behaviour is the same:
not eating enough.
The mechanism underneath it is completely different.
And good treatment targets the mechanism.
ARFID is not anorexia without the body-image problem
It’s tempting to think of ARFID as a milder cousin of anorexia.
It isn’t.
It is a different eating disorder.
And it can become extremely serious.
A person doesn’t need to fear becoming fat for restrictive eating to threaten their health.
Nor should somebody be dismissed because they appear to be “choosing” not to eat.
Avoidance often makes perfect sense once we understand what their brain believes it is protecting them from.
That is perhaps the most useful distinction to remember:
Anorexia often says: “I must not gain weight.”
ARFID may say: “I want to eat, but eating doesn’t feel safe, tolerable or rewarding.”
Both deserve compassion.
Both deserve proper assessment.
And when someone’s weight or nutritional health is deteriorating, both deserve to be taken seriously.
