Malnutrition – Symptoms (2024)

The main symptom of malnutrition (undernutrition) is unintentional weight loss, although this is not always obvious.

Weight loss

Most people who are malnourished will lose weight, but it's possible to be a healthy weight or even overweight and still be malnourished.

For example, this can happen if you're not getting enough nutrients, such as some types of vitamins and minerals, through your diet.

You could be malnourished if:

  • you unintentionally lose 5 to 10% of your body weight within 3 to 6 months
  • your body mass index (BMI) is under 18.5 (although a person with a BMI under 20 could also be at risk) – use theBMI calculator to work out your BMI
  • clothes, belts and jewellery seem to become looser over time

See a GP if you have unintentionally lost a lot of weight over the past few months.

If a friend or family member has lost a lot of weight, talk to them about your concerns and encourage them to get help.

Other symptoms

Other symptoms of malnutrition include:

  • reduced appetite
  • lack of interest in food and drink
  • feeling tired all the time
  • feeling weaker
  • getting ill often and taking a long time to recover
  • wounds taking a long time to heal
  • poor concentration
  • feeling cold most of the time
  • low mood, sadness and depression

See a GP if you have these symptoms. If you notice them in someone else, try to encourage them to get help.

Symptoms in children

Symptoms of malnutrition in a child can include:

  • not growing or putting on weight at the expected rate (faltering growth)
  • changes in behaviour, such as being unusually irritable, slow or anxious
  • low energy levels and tiring more easily than other children

See a GP if you're concerned about your child's health or development at any point.

Page last reviewed: 23 May 2023
Next review due: 23 May 2026

Malnutrition – Symptoms (2024)

FAQs

Malnutrition – Symptoms? ›

Malnutrition Warning Signs

Lack of muscle mass. Swollen stomach (called Kwashiorkor) Fatigue and low energy levels. Lack of growth and low body weight (in children)

What are the red flags of malnutrition? ›

Malnutrition Warning Signs

Lack of muscle mass. Swollen stomach (called Kwashiorkor) Fatigue and low energy levels. Lack of growth and low body weight (in children)

How do you fix malnutrition? ›

Dietary changes and supplements

having a healthier, more balanced diet. eating "fortified" foods that contain extra nutrients. snacking between meals. having drinks that contain lots of calories.

How long does it take to become severely malnourished? ›

unintentional weight loss – losing 5% to 10% or more of weight over 3 to 6 months is one of the main signs of malnutrition.

Can your body recover from malnutrition? ›

The upside is, that you will get better and recover well if you follow the expert advice of your healthcare professional and have a cheer squad of family and friends around you providing ongoing support and encouragement. Who knows, perhaps you will feel even better than you did before your malnutrition diagnosis.

How do I tell if I'm malnourished? ›

Symptoms of malnutrition
  • loss of appetite and lack of interest in food or fluids.
  • unplanned weight loss – this might cause clothing, rings, watches or dentures to become loose.
  • tiredness or low energy levels.
  • reduced ability to perform everyday tasks like showering, getting dressed or cooking.
Mar 10, 2023

What are the danger signs of malnutrition to under five? ›

FIVE WARNING SIGNS THAT YOUR CHILD IS MALNOURISHED
  • Weight Loss, Slow Weight Gain, or Underweight. Children gain weight at different rates. ...
  • Not Growing Longer or Taller. ...
  • Eating Less Than Usual. ...
  • Not Eating Well Due to Stomach Problems. ...
  • Less Active or Less Playful.
Sep 24, 2018

Does drinking water help malnutrition? ›

The power of water

When a child suffers from intestinal worms or diarrhea, nutrients are not absorbed and do not make it to where they need to be in the body. That's why, worldwide, hunger and malnutrition are linked to a lack of safe water and sanitation.

What is best to eat when malnourished? ›

More ideas to increase your calorie intake
  • porridge, corn or wheat-based cereals.
  • toast with margarine or butter and jam, peanut butter and marmalade.
  • baked beans or spaghetti on toast or bread.
  • scrambled, boiled, fried or poached egg on bread or toast.
  • glass of fresh orange juice or whole milk or piece of fruit with cream.

What can I drink for malnutrition? ›

Shakes, such as Boost or Ensure, are intended for oral consumption. You can find them on a grocery store shelf. These are formulated to help you meet general nutrition goals such as increased calories and protein. Some nutrition shakes are designed to be compatible with health conditions such as diabetes (Glucerna).

How do I know if my body is in starvation mode? ›

We dive into 11 signs that you may not be eating enough.
  1. Being underweight. To evaluate your weight, you may want to start with your body mass index (BMI). ...
  2. Low energy levels. ...
  3. Hair loss. ...
  4. Changes in hunger cues. ...
  5. Problems trying to get pregnant. ...
  6. Mood problems. ...
  7. Feeling cold all the time. ...
  8. Constipation.
Sep 7, 2023

What age is malnutrition most damaging? ›

Nearly half of deaths among children under 5 years of age are linked to undernutrition. These mostly occur in low- and middle-income countries.

At what weight are you considered malnourished? ›

under 18.5kg/m2 – you are considered underweight and possibly malnourished. 18.5 to 24.9kg/m2 – you are within a healthy weight range for young and middle-aged adults. 25.0 to 29.9kg/m2 – you are considered overweight.

What is the last stage of malnutrition? ›

The end-stage of starvation usually brings with it one of two different diseases - kwashiorkor and marasmus. Marasmus happens due to extreme energy deficiency, often from inadequate amounts of calories and protein. The person's body weight reaches dangerously low levels and infections are common.

Can your organs shut down from malnutrition? ›

What happens to the body during starvation? The body runs on the energy provided by the calories in the food we eat. When you stop eating, your body starts to break down its own tissues for food, disrupting all the vital processes of your systems. This results in severe weight loss and leads to organ failure.

What happens if malnutrition is left untreated? ›

If untreated, malnutrition can lead to mental or physical disability, illness, and possibly death.

What are the 4 indicators of malnutrition? ›

The indicators stunting, wasting, overweight and underweight are used to measure nutritional imbalance; such imbalance results in either undernutrition (assessed from stunting, wasting and underweight) or overweight.

What is the first indicator of malnutrition? ›

Clinical signs and symptoms of protein-energy malnutrition (PEM) include the following: Poor weight gain. Slowing of linear growth. Behavioral changes - Irritability, apathy, decreased social responsiveness, anxiety, and attention deficits.

What does a malnourished person look like? ›

Undernutrition may look like: Low body weight, prominent bones, depleted fat and muscle. Thin arms and legs with edema (swelling with fluid) in your belly and face. Stunted growth and intellectual development in children.

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