Appetite in anemia: decreased appetite, cravings for ice, causes and treatment

Changes in appetite associated with anemia are not a separate diagnosis, but a symptom or accompanying sign that helps understand what's happening with iron metabolism, vitamins, inflammation, the gastrointestinal tract, or the overall health of the body. Anemia can cause a decreased interest in regular food, rapid satiety, nausea, an unpleasant sensation in the mouth, a craving for ice or non-food substances, and, in children, a refusal to eat and a delay in normal weight gain. [1]

It's important to distinguish between two conditions: decreased appetite and pica. Decreased appetite is more common in severe anemia, chronic inflammation, infections, cancer, vitamin B12 or folate deficiency, and stomach and intestinal diseases, while pica is especially often associated with iron deficiency. [2]

Anemia itself can impair nutrition through weakness, shortness of breath, palpitations, dizziness, and fatigue. When a person has difficulty cooking, grocery shopping, sitting at the table for long periods, or eating a normal amount of food, nutritional deficiencies worsen, creating a vicious cycle: anemia reduces activity and appetite, and poor nutrition hinders blood regeneration. [3]

Not every loss of appetite associated with anemia is due to the anemia itself. If a person loses weight, feels full quickly, experiences abdominal pain, notices blood in the stool, black stool, persistent nausea, difficulty swallowing, night sweats, or unexplained fever, an underlying cause should be sought: blood loss, inflammation, infection, intestinal disease, tumor, or another medical condition. [4]

The practical conclusion is simple: appetite in anemia should be assessed along with the type of anemia, test results, and symptoms. The same symptom—for example, "no appetite"—will have different causes and treatment strategies in a child with iron deficiency, an elderly person with vitamin B12 deficiency, and a patient with chronic inflammation. [5]

How appetite changes	Possible association with anemia	What is important to check
Decreased appetite	Iron deficiency, vitamin B12, folate, inflammation, severe illness	Complete blood count, ferritin, transferrin saturation, vitamin B12, folate
Ice craving	Often associated with iron deficiency	Ferritin, hemoglobin, cause of iron deficiency
Craving for earth, clay, starch, paper	Pica, possible link to iron deficiency	Iron, ferritin, risks from consumed substances
Early saturation	Diseases of the stomach, intestines, inflammation, tumor process	Examination, tests, gastroenterological assessment as indicated
Pain in the mouth, burning tongue	Vitamin B12, folate, and iron deficiencies	Vitamin B12, folate, ferritin, mucosal examination

Why anemia can cause decreased appetite

Iron deficiency anemia causes the body to not receive enough iron to form hemoglobin, and tissues are less able to receive oxygen. The National Institutes of Health (NIH) notes that iron deficiency anemia can cause gastrointestinal disturbances, weakness, fatigue, and difficulty concentrating; these symptoms alone can reduce the desire to eat and interfere with regular eating. [6]

In children, iron deficiency often manifests not only as paleness and fatigue, but also as decreased appetite, restlessness, lethargy, tachycardia, and developmental delays in severe cases of deficiency. This is important because parents sometimes perceive poor appetite as "capriciousness," although it may be a symptom of iron deficiency or anemia. [7]

Vitamin B12 deficiency can cause decreased appetite due to inflammation and soreness of the tongue, mouth discomfort, abdominal pain, weight loss, indigestion, and general weakness. The MSD Manual describes gastrointestinal symptoms associated with vitamin B12 deficiency, including weight loss and poorly localized abdominal pain, as well as glossitis, which can interfere with normal eating. [8]

Folate deficiency is often associated not only with the vitamin itself, but also with poor diet, alcohol, malabsorption, or increased need. The US National Institutes of Health emphasizes that isolated folate deficiency is less common and often occurs in combination with other deficiencies due to poor diet, alcohol, or absorption disorders. [9]

In chronic inflammatory anemia, appetite may be reduced due to an underlying illness: chronic infection, autoimmune inflammation, cancer, chronic kidney disease, or another long-term condition. Inflammation increases hepcidin, blocks the availability of iron for hematopoiesis, and can simultaneously cause weakness, weight loss, and decreased interest in food. [10]

Cause	How does it affect appetite?	Additional signs
Iron deficiency	Weakness, fatigue, gastrointestinal discomfort, sometimes poor appetite	Low ferritin, ice cravings, brittle nails
Vitamin B12 deficiency	Burning tongue, mouth pain, digestive symptoms	Numbness, tingling, unsteadiness, glossitis
Folate deficiency	Often associated with poor nutrition or malabsorption	Glossitis, weakness, macrocytic anemia
Chronic inflammation	Decreased appetite due to underlying disease and cytokines	High C-reactive protein, normal or high ferritin
Blood loss	Weakness and depletion of iron stores	Heavy periods, black stool, blood in the stool

Perverted appetite: craving for ice, earth and inedible substances

Pica is a persistent urge to eat or chew substances that have no nutritional value, such as ice, earth, clay, starch, paper, chalk, hair, paint, or other inedible objects. Particularly known in the context of anemia is pagophagia—the urge to chew ice—which is often associated with iron deficiency, even when anemia has not yet become severe. [11]

The association of pica with iron deficiency anemia is supported by numerous clinical observations, but the mechanism remains unclear. A 2023 review emphasizes that adults experience various forms of pica associated with iron deficiency anemia, and that treatment of iron deficiency often results in resolution of unusual food cravings. [12]

Ice cravings are not considered a "safe habit" if they are compulsive and repeated daily. The Mayo Clinic notes that ice chewing can be associated with iron deficiency, with or without anemia; therefore, if this symptom occurs, it's worth checking ferritin, hemoglobin, and the underlying cause of the iron deficiency, rather than simply attributing it to stress or heat. [13]

Cravings for soil, clay, paint, or other substances are more dangerous than cravings for ice. They can lead to intestinal obstruction, constipation, parasitic infections, lead poisoning, tooth decay, and other complications; the MSD Manual recommends risk assessment for the specific substance, such as testing for lead from paint and parasites from soil. [14]

In cases of pica, it's important not to shame the patient or limit oneself to a psychiatric explanation. An adult, child, or pregnant woman with a craving for non-food substances requires a complete blood count, ferritin, transferrin saturation, a nutritional assessment, and a search for the cause of iron deficiency. For hazardous substances, toxic and infectious risks are additionally assessed. [15]

A type of unusual traction	Possible connection	What is dangerous?	What to check
Ice	Often associated with iron deficiency	Tooth damage, a signal of hidden deficiency	Ferritin, hemoglobin, cause of iron deficiency
Earth or clay	Possible pica in iron deficiency	Parasites, intestinal problems, toxic impurities	Iron, parasites according to indications
Starch or flour	May be a variant of pica	Eating disorders, digestive problems	Iron, nutrition, metabolic risks
Paint, plaster	Possible connection with pica	Lead poisoning	Lead level according to readings
Paper or hair	Pica, sometimes due to psychological or deficiency causes	Intestinal obstruction, deficiencies	Iron, mental state, complications

What types of anemia are most often associated with loss of appetite?

Iron deficiency anemia is most often associated with appetite changes in two forms: some people experience decreased appetite, while others develop pica. The US National Institutes of Health describes the stages of iron depletion: first, iron stores are depleted, then iron transport is impaired, and when stores are depleted, hemoglobin and hematocrit decrease. Symptoms can appear gradually and remain nonspecific for a long time. [16]

Anemia due to vitamin B12 deficiency can affect appetite through changes in the oral mucosa, tongue, stomach, and nervous system. Some people experience glossitis, taste disturbances, abdominal discomfort, weight loss, and weakness, while neurological symptoms can develop even in mild cases of anemia. [17]

Folate deficiency anemia often reflects a broader nutritional or absorption problem. Folate deficiency is associated with poor diet, alcohol, celiac disease, inflammatory bowel disease, certain medications, pregnancy, and hemolysis; therefore, decreased appetite in this situation may not only be a symptom of anemia but also part of the underlying cause of the deficiency. [18]

Anemia of chronic inflammation is often accompanied by decreased appetite due to the inflammatory disease itself. In chronic infections, autoimmune diseases, cancer, and chronic kidney disease, the body alters iron metabolism through hepcidin, and inflammatory mediators can simultaneously reduce appetite, body weight, and physical activity. [19]

Anemia due to blood loss affects appetite indirectly: a person experiences weakness, palpitations, dizziness, shortness of breath, and may eat less due to general exhaustion. With chronic blood loss, such as from the gastrointestinal tract or heavy menstrual flow, decreased ferritin can develop over months, and poor appetite sometimes masks the underlying problem. [20]

Type of anemia	How appetite can change	The main diagnostic landmark
Iron deficiency	Decreased appetite, ice cravings, pica	Ferritin, transferrin saturation, cause of deficiency
Vitamin B12 deficiency	Decreased appetite, mouth pain, taste changes	Vitamin B12, mean corpuscular volume, neurological symptoms
Folate deficiency	Poor nutrition, loss of appetite, mouth ulcers	Folate, vitamin B12, nutrition, medications
Anemia of inflammation	Decreased appetite due to chronic illness	C-reactive protein, ferritin, transferrin saturation
Anemia due to blood loss	Weakness interferes with eating, sometimes early satiety due to stomach illness	Complete blood count, ferritin, blood source search

Diagnostics: What tests are needed for changes in appetite and anemia?

The first step is a complete blood count (CBC) with red blood cell indices, white blood cell (WBC), platelet, and reticulocyte counts. The Merck Manual emphasizes that the assessment of anemia begins with a medical history, physical examination, complete blood count (CBC), reticulocyte count, and a peripheral blood smear, as these data help determine whether red blood cell production is impaired, whether there is blood loss, or whether there is blood cell destruction. [21]

The second step is to assess iron metabolism: ferritin, serum iron, transferrin or total iron-binding capacity, and transferrin saturation. The American Gastroenterological Association recommends using a ferritin level of 45 nanograms per milliliter as the diagnostic threshold for iron deficiency in anemia, because the lower threshold of 15 nanograms per milliliter may miss some patients. [22]

The third step is to check vitamin B12 and folate levels, especially if the red blood cells are large, there is a burning tongue, mouth ulcers, diarrhea, loss of appetite, weight loss, numbness, tingling, or unsteadiness. Vitamin B12 and folate deficiencies can cause megaloblastic anemia, but deficiency symptoms sometimes appear before a significant drop in hemoglobin. [23]

The fourth step is to look for the cause of anemia, not just "raising hemoglobin." If blood loss is suspected, the doctor evaluates menstrual bleeding, stool, gastrointestinal symptoms, medications, blood donation, surgery, and family risks; if inflammation is suspected, the doctor evaluates C-reactive protein, erythrocyte sedimentation rate, kidney function, signs of infection, autoimmune disease, or cancer. [24]

The fifth step is to assess the appetite itself: how long has the loss lasted, whether there is weight loss, early satiety, nausea, pain, difficulty swallowing, taste changes, pica, depression, anxiety, medications, or dietary restrictions. This discussion is important because anemia may not be the cause of poor appetite, but rather a consequence of poor nutrition, stomach disease, chronic inflammation, or occult blood loss. [25]

Diagnostic task	What tests help?	What does it show?
Confirm anemia	Complete blood count	Hemoglobin, red blood cell size, platelets
Assess bone marrow response	Reticulocytes	Are new red blood cells being produced actively enough?
Find iron deficiency	Ferritin, transferrin saturation	Iron reserves and availability
Rule out vitamin deficiency	Vitamin B12, folate	Causes of macrocytic anemia and oral symptoms
Find inflammation	C-reactive protein, erythrocyte sedimentation rate	Possible anemia of inflammation
Find the source of blood loss	Gynecological or gastrointestinal evaluation	Cause of recurrent iron deficiency

How to restore appetite and nutrition when you have anemia

The main way to restore appetite is to treat the underlying cause of anemia. If the problem is iron deficiency, you need to replenish the iron and identify the source of the deficiency; if it is vitamin B12 or folate deficiency, replenish the corresponding vitamin and understand why it has decreased; if it is inflammation, manage the underlying disease. [26]

For iron deficiency anemia, oral iron is typically given no more than once daily, and if poorly tolerated, alternate-day dosing is sometimes used. The 2024 American Gastroenterological Association Clinical Update also indicates that vitamin C may improve the absorption of oral iron, and if tablets are poorly tolerated or ineffective, intravenous iron should be considered. [27]

The diet should be rich in protein and micronutrients, yet gentle for someone with weakness and poor appetite. Small, nutritious meals are best: eggs, fish, poultry, meat, cottage cheese or yogurt if tolerated, legumes, cereals, nut butters, creamy soups, vegetables with butter, berries, and foods with vitamin C, along with plant-based sources of iron. [28]

If your appetite is reduced due to a burning tongue, mouth ulcers, or pain when swallowing, you should check your vitamin B12, folate, iron, and mucosal status. Until the underlying cause is corrected, it's sometimes easier to eat soft foods: soups, purees, omelets, fish, fermented milk products, porridge, and soft fruits. However, this is a temporary measure and not a substitute for diagnosis. [29]

Avoid trying to "whet your appetite" with alcohol, spicy foods, uncontrolled supplements, or stimulants. With anemia, it's more important to safely restore blood circulation, avoid blood loss, and avoid worsening gastrointestinal symptoms. Self-medication with iron should be especially cautious if the cause of the anemia has not yet been determined. [30]

Problem	What helps?	What to avoid
I don't have the energy to cook.	Simple protein dishes, ready-made healthy products, soups	Long fasting intervals
Rapid saturation	Small portions 5-6 times a day	Large heavy meals
Iron deficiency	Iron as directed, meat, fish, legumes, vitamin C	Tea and coffee with iron at the same time
Pain in the mouth	Soft foods and testing for vitamin B12, folate, and iron	Sour and rough foods for severe irritation
Pica	Iron deficiency treatment and risk assessment	Eating soil, paint, chalk, paper
Poor iron tolerance	Discuss the form, dose, regimen, or intravenous iron	Quitting treatment on your own without a plan

When loss of appetite due to anemia can be dangerous

A dangerous sign is weight loss without intentional weight loss. If anemia is accompanied by decreased appetite, early satiety, abdominal pain, changes in stool, black stool, blood in the stool, or difficulty swallowing, gastrointestinal blood loss, malabsorption, inflammatory bowel disease, or tumor should be ruled out. [31]

Decreased appetite in an elderly person with anemia requires particularly careful evaluation. In this group, anemia may be associated with chronic kidney disease, inflammation, vitamin B12 deficiency, medications, occult blood loss, cancer, and malnutrition, and symptoms often develop slowly and are disguised as "age-related weakness." [32]

In children with anemia, poor appetite should not be dismissed as mere food fads if accompanied by pallor, lethargy, growth retardation, frequent infections, shortness of breath, palpitations, unusual eating habits, or cravings for non-food items. Childhood iron deficiency can impact development, behavior, and performance, so prompt diagnosis and treatment are essential. [33]

In pregnant women, changes in appetite, nausea, and food preferences can be part of pregnancy, but anemia shouldn't be dismissed as just morning sickness or "normal weakness." Pregnancy increases the need for iron and folate, and iron deficiency and anemia can worsen well-being and increase risks, so testing and safe correction of the deficiency are essential. [34]

Urgent medical evaluation is needed if loss of appetite is accompanied by fainting, chest pain, shortness of breath at rest, black stools, hematemesis, severe weakness, confusion, rapidly progressive weight loss, or neurological symptoms. These signs go beyond "normal anemia" and may indicate bleeding, severe vitamin B12 deficiency, cardiac stress, or a serious underlying medical condition. [35]

A dangerous sign	Why is it important?	What to do
Weight loss	Possible chronic disease, tumor, malabsorption	Don't delay the examination
Black stool or blood in the stool	Gastrointestinal bleeding is possible	Discuss with your doctor immediately
Difficulty swallowing	Possible esophageal disease or severe iron deficiency	Gastroenterological evaluation
Numbness and unsteadiness	Vitamin B12 deficiency is possible	Check vitamin B12 and neurological status
Pica with soil or paint	Risk of toxins, parasites, intestinal complications	Check your iron and possible complications
Shortness of breath at rest or chest pain	Severe anemia or cardiac ischemia may occur.	Urgent help

Frequently asked questions

Can anemia reduce appetite?
Yes, it can, especially in cases of severe weakness, iron deficiency, vitamin B12 or folate deficiency, chronic inflammation, and stomach and intestinal diseases. However, decreased appetite is not a specific symptom of anemia, so it's important to look for the type of anemia and its cause. [36]

Why do people with anemia crave ice?
The urge to chew ice is called pagophagia and is often associated with iron deficiency, sometimes even without overt anemia. The reason for this connection is not fully understood, but if this symptom occurs, it's worth checking ferritin, hemoglobin, and the source of possible iron loss. [37]

If a child isn't eating well, could it be anemia?
It could, especially with iron deficiency: children may exhibit poor appetite, lethargy, restlessness, shortness of breath, tachycardia, and developmental delays with severe deficiency. However, poor appetite in a child has many causes, so an examination and tests are needed, not just an attempt to "feed them iron." [38]

What tests should be performed if you have poor appetite and suspected anemia?
Typically, a complete blood count, reticulocyte count, ferritin, transferrin saturation, vitamin B12, and folate levels are performed first. Further tests include inflammation, kidney function, a gastrointestinal examination, or other symptom-based tests. [39]

Can low ferritin occur with normal hemoglobin and poor appetite?
Yes, iron deficiency can occur before anemia: ferritin decreases while hemoglobin remains within normal limits. This can lead to fatigue, decreased performance, cravings for ice, hair loss, and other symptoms. [40]

Should I take iron if I've lost my appetite?
Don't start taking iron supplements just because your appetite has decreased. Iron should be taken only if you have a confirmed deficiency or as prescribed by your doctor, as poor appetite can be related to vitamin B12, folate, inflammation, stomach issues, medications, or other causes. [41]

Why might iron tablets make you lose your appetite?
Oral iron can cause nausea, abdominal discomfort, constipation, or changes in bowel habits, which can make you eat less. In this situation, it's important to discuss with your doctor the appropriate iron form, dosage regimen, alternate-day dosing, or intravenous iron if indicated, rather than simply discontinuing treatment without an alternative. [42]

Can vitamin B12 deficiency cause loss of appetite?
Yes, vitamin B12 deficiency can be accompanied by weakness, glossitis, gastrointestinal symptoms, weight loss, and neurological impairment. If you experience numbness, tingling, unsteadiness, or memory impairment, it's important to seek immediate diagnosis. [43]

Can anemia be caused by poor appetite?
Yes, long-term malnutrition can lead to iron, folate, vitamin B12, and protein deficiencies, especially in children, the elderly, patients with chronic illnesses, alcohol consumption, strict restrictive diets, or malabsorption. Therefore, it is important to evaluate not only blood tests but also the diet. [44]

When does poor appetite associated with anemia require urgent medical attention?
Seek immediate medical attention if you experience sudden weight loss, fainting, shortness of breath at rest, chest pain, black stools, blood in the stool, hematemesis, confusion, severe weakness, or neurological symptoms. These signs may indicate bleeding, severe anemia, or a serious underlying illness. [45]

Key points from experts

Thomas G. DeLoughery, MD, MACP, FAWM, is a professor of medicine, pathology, and pediatrics at Oregon Health and Science University and an expert in hematology, laboratory medicine, iron deficiency, and coagulation disorders. His practice thesis for this topic: when anemia and appetite changes, it's important to identify the type of deficiency and the cause of the anemia, rather than prescribing iron indiscriminately. [46]

Tomas Ganz, MD, Ph.D., is a Distinguished Research Professor of Medicine and Pathology at the University of California Los Angeles and a researcher of hepcidin and erythroferrone, key iron-regulating hormones. His work is important for understanding why inflammation can reduce appetite and lock iron into stores, making it less available for hematopoiesis. [47]

Michelle Sholzberg, MDCM, M.Sc., is a clinical researcher, chief of the Division of Hematology-Oncology, and medical director of the Coagulation Laboratory at St. Michael's Hospital, University of Toronto. Her work on iron deficiency highlights that low ferritin and iron deficiency can be clinically significant even before severe anemia, including symptoms of fatigue and changes in eating behavior. [48]

Cynthia W. Ko, MD, MS, is a board-certified gastroenterologist, Associate Professor of Gastroenterology and Medicine at the University of Washington, and chair of the American Gastroenterological Association Panel on Gastrointestinal Evaluation of Iron Deficiency Anemia. Her field is particularly important because poor appetite, iron deficiency, and anemia are sometimes diagnosed as manifestations of occult gastrointestinal blood loss or malabsorption. [49]

The bottom line: appetite may be decreased, distorted, or unusual in anemia, but this symptom alone does not reveal the exact cause. Safe management includes a complete blood count, ferritin, transferrin saturation, vitamin B12, folate, an assessment of inflammation, a search for blood loss, and treatment of the underlying mechanism that led to anemia and malnutrition. [50]