Deficiency Diseases: Overview and Prevention
Know about the deficiency diseases, what they are, common deficiency diseases, symptoms, causes and prevention. Learn about how to prevent deficiency diseases.
Written by Dr. J T Hema Pratima
Reviewed by Dr. Dhankecha Mayank Dineshbhai MBBS
Last updated on 13th Jan, 2026
Introduction
Deficiency diseases occur when the body lacks essential nutrients like vitamins, minerals, proteins, or other vital components needed for proper functioning. These deficiencies can lead to various health problems, ranging from mild fatigue to severe illnesses. Most deficiency diseases can be prevented with a balanced diet and healthy lifestyle choices.
In this article, we’ll explore common deficiency diseases, their symptoms, causes, and simple ways to prevent them.
What Are Deficiency Diseases?
Deficiency diseases are health conditions caused by a lack of essential nutrients in the body. These nutrients include:
Vitamins (e.g., Vitamin A, B-complex, C, D, E, K)
Minerals (e.g., Iron, Calcium, Iodine, Zinc)
Proteins
Healthy fats
When the body doesn’t get enough of these nutrients, it can lead to various health issues, affecting growth, immunity, and overall well-being.
Consult a General Practitioner for Personalised Advice
Common Deficiency Diseases and Their Symptoms
1. Iron Deficiency (Anaemia)
The symptoms, causes, and prevention include:
Symptoms:
Fatigue and weakness
Pale skin
Shortness of breath
Dizziness
Causes:
Poor iron intake (lack of leafy greens, meat, beans)
Blood loss (heavy periods, ulcers)
Prevention:
Eat iron-rich foods like spinach, lentils, red meat, and fortified cereals.
Pair iron-rich foods with Vitamin C (oranges, lemons) for better absorption.
2. Vitamin D Deficiency
The symptoms, causes, and prevention include:
Symptoms:
Bone pain and muscle weakness
Frequent infections
Mood changes (depression, fatigue)
Causes:
Lack of sunlight exposure
Poor dietary intake (few dairy products, fish)
Prevention:
Spend 10-15 minutes in sunlight daily.
Consume fortified milk, eggs, and fatty fish (salmon, tuna).
3. Vitamin B12 Deficiency
The symptoms, causes, and prevention include:
Symptoms:
Numbness in hands/feet
Memory problems
Weakness and fatigue
Causes:
Strict vegetarian/vegan diet (B12 is mainly in animal products)
Poor absorption due to gut disorders
Prevention:
Include eggs, dairy, meat, or fortified cereals.
Supplements (if advised by a doctor).
4. Iodine Deficiency (Goitre & Thyroid Issues)
The symptoms, causes, and prevention include:
Symptoms:
Swelling in the neck (goitre)
Weight gain
Fatigue and dry skin
Causes:
Lack of iodised salt in the diet
Low seafood intake
Prevention:
Use iodised salt.
Eat seafood, dairy, and eggs.
5. Vitamin A Deficiency (Night Blindness & Weak Immunity)
The symptoms, causes, and prevention include:
Symptoms:
Poor night vision
Dry eyes
Frequent infections
Causes:
Lack of carrots, sweet potatoes, leafy greens
Prevention:
Eat orange-colored vegetables (carrots, pumpkins).
Include dairy and eggs.
Who Is at Risk of Deficiency Diseases?
Some people are more prone to nutrient deficiencies due to:
Poor diet – Junk food, low fruits/vegetables.
Digestive disorders – Crohn’s disease, celiac disease.
Pregnancy & breastfeeding – Higher nutrient needs.
Vegans/vegetarians – Risk of B12, iron, and protein deficiency.
Elderly people – Reduced nutrient absorption.
How to Prevent Deficiency Diseases?
Follow the points below to prevent deficiency diseases:
1. Eat a Balanced Diet
Include fruits, vegetables, whole grains, lean proteins, and dairy.
Choose fortified foods (like cereals with added vitamins).
2. Get Regular Health Check-ups
Blood tests can detect deficiencies early.
Consult a doctor if you experience persistent symptoms.
3. Consider Supplements (If Needed)
Only take supplements under medical supervision.
Avoid self-medication, as excess vitamins can be harmful.
4. Sunlight Exposure
Spend time outdoors for natural Vitamin D.
5. Stay Hydrated
Water helps in nutrient absorption.
When to See a Doctor?
If you experience:
Constant fatigue, dizziness, or weakness
Unexplained weight loss/gain
Frequent infections
Skin/hair/nail changes
It’s best to consult a doctor for proper diagnosis and treatment.
Final Thoughts
Deficiency diseases are preventable with the right diet and lifestyle choices. Eating a variety of nutrient-rich foods, getting enough sunlight, and staying aware of your body’s signals can help maintain good health.
Consult a General Practitioner for Personalised Advice
Consult a General Practitioner for Personalised Advice
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