Imagine trying to drive at night with no headlights—that’s what your body goes through when it's deficient in vitamin A, especially affecting your vision, skin, and immune system. Vitamin A Deficiency is a major concern, especially in developing countries and vulnerable populations. But what is it, and how can you prevent it from impacting your health?
What is Vitamin A Deficiency?
Vitamin A deficiency is a condition that occurs when your body doesn't get enough vitamin A to function properly. This fat-soluble vitamin plays a vital role in maintaining eye health, immune function, skin integrity, and cell growth. A deficiency can lead to serious health problems, especially in children and pregnant women.
If left untreated, it can lead to blindness, infections, skin issues, infertility, and more. Understanding the signs early and knowing how to address them is key to staying healthy.
What is Vitamin A?
Vitamin A is a fat-soluble nutrient essential for various body functions. It’s stored in the liver and used when your body needs it. There are two main forms of vitamin A found in our diets.
What are the Different Forms of Vitamin A?
Preformed Vitamin A: Found in animal-based foods like liver, eggs, dairy, and fish. It's in the form of retinol, retinal, and retinyl esters—ready to be used by the body.
Provitamin A Carotenoids Typhoid doesn’t hit you all at once - it creeps in gradually. Most people begin to notice symptoms 1 to 3 weeks after being exposed to the bacteria, but the signs can often be mistaken for other common infections. That’s why early recognition is so important. The sooner you spot the signs, the quicker the treatment, and the better the outcome.
Here’s what you need to watch out for:
Prolonged high fever: This is often the first and most noticeable sign. The fever tends to rise gradually and may spike in the afternoon or evening. It’s not your usual fever—it can last for days or even weeks if untreated.
Weakness and fatigue: People with typhoid often feel extremely tired, even after plenty of rest. Daily activities become exhausting.
Loss of appetite: Many patients report not feeling hungry at all. Meals that were once enjoyable may suddenly seem unappealing.
Headache: A constant, dull headache often accompanies the fever and adds to the overall discomfort.
Abdominal pain or discomfort: Pain may occur in the middle of the stomach or on the lower right side. It may feel like bloating, cramps, or unease.
Constipation or diarrhea: Interestingly, symptoms can vary by age. Children often experience diarrhea, while adults are more likely to be constipated. In some cases, bowel movements may alternate.
Dry cough: While not always present, a persistent dry cough can be a symptom in the early stages of the disease.
Skin rash: Some individuals develop flat, rose-colored spots on the chest or abdomen. These are called "rose spots" and are a classic sign of typhoid.
Mental confusion or irritability: In severe cases, the illness may affect the nervous system, causing confusion, restlessness, or mood swings.
The tricky part about typhoid is that its symptoms are nonspecific—they can easily be mistaken for viral infections, dengue, or even malaria. That’s why it's crucial to seek medical help if a fever lasts more than three days or if multiple symptoms appear together, especially in someone who has recently traveled or consumed unsafe water.
Found in plant-based foods like carrots, spinach, and sweet potatoes. The most common form is beta-carotene, which your body converts into vitamin A.
Medical Disorders Caused by Vitamin A Deficiency
Condition | Description |
Night Blindness | Difficulty seeing in dim light |
Xerophthalmia | Progressive eye damage due to dryness |
Bitot’s Spots | Foamy white patches on the eye |
Keratomalacia | Corneal softening that can lead to blindness |
Respiratory Infections | Increased frequency and severity of infections |
Infertility | Hormonal and reproductive complications |
Stunted Growth in Children | Physical and cognitive delays |
What are the Signs and Symptoms of Vitamin A Deficiency?
Symptoms can vary from mild to severe and may show up differently in children, adults, and pregnant women.
Night Blindness: One of the earliest signs is difficulty seeing in dim light or at night due to impaired production of visual pigments in the retina.
Dry Eyes or Inability to Produce Tears: Vitamin A maintains moisture in the eyes; without it, tear glands may stop working properly, leading to discomfort and dryness.
Foamy Patches in the Eyes (Bitot’s Spots): These are white, foamy lesions on the conjunctiva caused by long-term dryness and keratin build-up—an alarming sign of deficiency.
Blurred Vision or Difficulty Adjusting to Darkness: Deficiency hampers the eye’s ability to adapt between light and dark environments, affecting visual clarity and comfort.
Dry and Scaly Skin: Vitamin A plays a role in skin cell turnover; a deficiency can cause rough, flaky skin, especially on the elbows and legs.
Hair Loss and Brittle Nails: Low vitamin A levels weaken hair follicles and nail beds, resulting in thinning hair and easily breakable nails.
Delayed Growth in Children: Vitamin A is essential for bone and tissue development; lack of it can lead to stunted height and delayed milestones in kids.
Poor Wound Healing: Wounds may heal slowly or get infected frequently due to impaired skin regeneration and immune response.
Frequent Infections: Vitamin A strengthens mucosal barriers and immune function, so a deficiency makes the body prone to respiratory and gastrointestinal infections.
Fatigue or Irritability: Though non-specific, persistent tiredness and mood swings may occur due to the body’s weakened immunity and reduced energy metabolism.
What Causes Vitamin A Deficiency?
There are two broad categories: dietary deficiency and malabsorption.
Dietary Causes
Poor intake of vitamin A-rich foods (meat, dairy, leafy vegetables)
Vegan/vegetarian diets without fortified foods
Malabsorption Causes
Pancreatic Disorders
Excessive Alcohol Use
Common Causes of Vitamin A Deficiency
Cause | How It Leads to Deficiency |
Poor diet | Lack of vitamin A-rich foods |
Chronic illness | Reduces absorption and increases nutrient loss |
Alcoholism | Damages the liver, affecting vitamin A storage |
Celiac and Crohn’s disease | Affect nutrient absorption in the intestines |
Surgery (intestinal or pancreatic) | Impacts fat-soluble vitamin absorption |
How is Vitamin A Deficiency Diagnosed?
Diagnosing vitamin A deficiency involves more than just identifying symptoms—it requires a comprehensive evaluation of your overall health, diet, and physical condition. Since the signs can sometimes mimic other health issues, doctors use a combination of tools to arrive at a clear diagnosis.
Here’s a breakdown of the most common diagnostic steps:
Medical History & Symptom Review
Your doctor will start by asking about your lifestyle, general health, dietary habits, and any symptoms you've noticed, like difficulty seeing at night, frequent infections, or dry skin. If you’ve had any digestive disorders or surgeries (like bariatric surgery), these will also be considered, as they can impair vitamin A absorption.
One of the most definitive ways to detect vitamin A deficiency is through blood tests that measure serum retinol levels. A serum retinol concentration below 0.70 µmol/L (20 µg/dL) generally indicates deficiency. However, this can be affected by infection or inflammation, so doctors may also look at other indicators or repeat the test.
A visual inspection of the eyes is critical, especially if you have signs of night blindness or dryness. Bitot’s spots (foamy white patches on the whites of the eyes) are a classic sign of long-standing deficiency. The doctor may also assess the conjunctiva and cornea for dryness or damage. Vision tests are conducted to evaluate how well your eyes adjust to low light.
A physical exam may include checking for dry, rough, or scaly skin, especially on the arms, legs, and elbows. The doctor may also look for keratinisation (bumpy, rough skin due to excess keratin) and hair thinning or brittleness, which are common in deficiency.
Since vitamin A comes mostly from diet, a detailed review of your eating habits is key. The doctor or a nutritionist will ask about your intake of vitamin A-rich foods like leafy greens, carrots, dairy, eggs, and liver. A lack of these in your regular meals could point to a dietary cause of the deficiency.
Response to Supplementation
In some cases, doctors may start a short trial of vitamin A supplements and observe how your body responds. If symptoms like night blindness or dry eyes improve quickly, it supports the diagnosis of vitamin A deficiency. However, this approach is usually combined with blood tests and clinical findings to avoid misdiagnosis.
Vitamin A Deficiency Diagnosis Tools
Diagnostic Tool | Purpose |
Blood Test | Measures serum retinol levels |
Eye Examination | Identifies Bitot’s spots, dryness, and night blindness |
Skin & Hair Check | Looks for dryness, keratinization, and hair loss |
Dietary Review | Assesses intake of vitamin A-rich foods |
Response to Treatment | Confirms improvement after supplements |
How is Vitamin A Deficiency Treated?
Treatment depends on the severity of the deficiency:
Dietary Modifications
Include vitamin A-rich foods like liver, eggs, milk, spinach, mangoes, sweet potatoes, carrots, and pumpkin.
Supplements
Oral vitamin A capsules (typically 200,000 IU for adults, adjusted for children)
Injectable vitamin A for malabsorption conditions
WHO recommends a vitamin A megadose for children at risk in endemic regions
Treat Underlying Conditions
Address diseases like celiac, cystic fibrosis, or liver problems
Correct iron or zinc deficiencies
How Can Vitamin A Deficiency Be Prevented?
Prevention is always better than a cure, especially in communities at risk.
Include sources of both preformed vitamin A and beta-carotene in your meals.
Consume fortified cereals, dairy, and oils if natural sources are limited.
Encourage exclusive breastfeeding for infants in the first 6 months.
Support community-wide vitamin A supplementation drives, especially in children under 5.
What Complications Can Occur Due to Vitamin A Deficiency?
Vitamin A deficiency can lead to serious health consequences, especially if not detected early.
Eye Problems
Night blindness (first visible sign)
Xerophthalmia – dry eyes due to tear gland failure
Corneal ulcers and blindness in severe cases
Skin Issues
Infertility
Growth Issues
Respiratory Tract Infections
Consult Top Internal Medicine Specialists at Artemis Hospitals, Gurgaon For Effective Treatment:
Vitamin A deficiency is a serious public health concern that can lead to vision problems, increased risk of infections, delayed growth, and even blindness, especially in children and pregnant women. Early diagnosis and timely treatment are crucial to prevent complications and ensure long-term health.
At Artemis Hospital, our skilled internal medicine team is dedicated to diagnosing and treating micronutrient deficiencies with evidence-based care. With advanced diagnostic tools, personalised dietary counselling, and preventive education, we offer a comprehensive approach to restoring your vitamin balance and overall health. Whether it’s nutritional support or managing complications, our experts ensure holistic care at every step.
Book an appointment with our internal medicine specialists today. Call our customer care at +91-124-451-1111 or WhatsApp at +91 9800400498. You can also book online through the Artemis Health app (available on iOS & Android).
Article By Dr. Arpit Jain
Head - Internal Medicine
Artemis Hospitals
Frequently Asked Questions
Who does vitamin A deficiency affect the most?
It most commonly affects children under 5, pregnant women, and people with chronic illnesses or malnutrition.
What complications can occur due to vitamin A deficiency?
It can lead to blindness, skin issues, stunted growth, and frequent infections due to a weakened immune system.
What can I expect if I have vitamin A deficiency?
Symptoms like night blindness, dry eyes, rough skin, and increased infections may appear. With timely treatment, most symptoms are reversible.
How can I increase my vitamin A levels naturally?
Consume foods rich in vitamin A, like carrots, mangoes, spinach, eggs, and liver. Consider fortified foods or supplements if necessary.
Can vitamin A deficiency cause hair loss?
Yes, low levels of vitamin A can disrupt hair follicle growth, leading to hair loss and thinning.
Can vitamin A deficiency cause anemia?
Yes, vitamin A helps in iron metabolism. Deficiency may contribute to iron-deficiency anemia.
Can vitamin A deficiency cause myopia or blurry vision?
It doesn’t cause myopia directly, but can lead to night blindness, blurred vision, and eventually corneal damage.
Can vitamin A deficiency cause headaches?
Indirectly, yes. Eye strain and dry eyes can lead to headaches in those with severe deficiency.
Can vitamin A deficiency cause color blindness?
No, but it can cause vision changes, including difficulty adapting to dim light.
Can vitamin A deficiency cause acne or skin problems?
Yes, vitamin A supports skin cell turnover. Deficiency may lead to dry skin, acne, and keratosis pilaris.
