Vitamin D Deficiency: Symptoms, Causes & Treatment

Vitamin D deficiency is an extremely common health condition in Jordan and the Arab region, where blood levels of this vital vitamin drop below 20 nanograms/milliliter (ng/mL). Despite Jordan's sunny climate, cultural and social factors such as traditional clothing and spending time indoors reduce direct sun exposure to the skin, which is the primary natural source for vitamin D synthesis.

Vitamin D is essential for bone and teeth health and calcium absorption, and it plays an important role in strengthening immunity and controlling inflammation in the body. When levels drop, symptoms may not appear initially, but over time patients experience muscle and bone pain, general fatigue, and weakened immunity. Children, women, and elderly people are at highest risk.

Recent studies indicate that the prevalence of vitamin D deficiency in Jordan exceeds 70% of the population, especially among women and children. This high prevalence makes awareness and periodic screening essential, as early treatment prevents serious complications such as osteoporosis and chronic immune weakness.

Symptoms of vitamin D deficiency may not appear in the early stages, but as levels continue to drop, symptoms gradually develop. Symptoms vary from person to person and can be mild or severe depending on the degree of deficiency and age. Women and children may experience more pronounced symptoms than men.

• Bone and muscle pain: Continuous or intermittent pain in the back, bones, and muscles, especially in the limbs.
• Fatigue and severe tiredness: Constant feeling of exhaustion even with adequate rest and general body weakness.
• Muscle weakness: Difficulty performing simple activities such as climbing stairs or walking long distances.
• Depression and anxiety: Mood changes and depression or anxiety symptoms without obvious cause.
• Weak immunity: Repeated infections with colds, flu, and infections.
• Delayed growth in children: In young children, may cause delayed growth and walking.
• Tooth decay: Weak enamel and tooth decay especially in children.
• Recurring muscle pain: Cramps and random muscle pain.
• Concentration and memory problems: Difficulty concentrating and feeling of weak memory.
• Chronic constipation: Gastrointestinal problems and repeated constipation.

• Limited sun exposure: Ultraviolet rays from the sun are necessary for vitamin D synthesis in the skin, and spending long hours indoors or wearing heavy clothing significantly reduces this exposure.
• Insufficient dietary intake: Very few foods naturally contain vitamin D, such as fatty fish and eggs, and not consuming these foods increases the risk of deficiency.
• Gastrointestinal absorption problems: Diseases such as Crohn's disease and ulcerative colitis or stomach surgeries reduce the body's ability to absorb vitamin D.
• Kidney and liver disease: The kidneys and liver are responsible for converting vitamin D into the active form the body uses, and disease in these organs reduces this process.
• Advanced age: As people age, the skin's ability to synthesize vitamin D from the sun decreases, and its absorption in the intestines also decreases.
• Dark skin tone: Darker skin requires longer sun exposure to produce the same amount of vitamin D as lighter skin.
• Certain medications: Some drugs such as anticonvulsants and medications that reduce fat absorption affect vitamin D metabolism.
• Metabolic disorders: Some rare genetic conditions that affect how the body uses vitamin D cause deficiency even with adequate levels.

• Female gender: Women in Jordan are more at risk due to modest clothing and spending more time indoors than men.
• Pregnancy and breastfeeding: Pregnant and nursing women need larger amounts of vitamin D, increasing the risk of deficiency.
• Obesity: Vitamin D is fat-soluble and stored in fat, and obese people may need higher doses.
• Young children: Especially those who rely only on breastfeeding without supplements.
• Elderly: People over 65 are at risk due to reduced mobility and sun exposure.
• Chronic disease patients: Diabetics and those with heart and respiratory diseases are at higher risk.
• Veils and heavy clothing: Traditional clothing and headscarves reduce direct sun exposure.
• Indoor workers: Employees who work indoors all day without sun exposure are at risk.
• Low-income groups: Inability to afford vitamin D-rich foods or supplements.
• Strict religious practices: Some religious observances that limit sun exposure may increase risk.

Accurate diagnosis of vitamin D deficiency requires a simple and easy blood test. The doctor takes the patient's medical history and inquires about symptoms and factors that may increase the risk of deficiency, then requests analysis to measure blood vitamin D levels.

• Blood test (25-Hydroxyvitamin D): This is the gold standard and most accurate test for diagnosing vitamin D deficiency. It measures 25(OH)D levels in blood, with normal levels being 30 ng/mL or higher (or 75 nanomol/liter). Levels between 20-29 ng/mL are considered insufficient, and levels below 20 ng/mL are considered severe deficiency.
• Clinical examination: The doctor examines the patient for clinical signs such as muscle and bone pain and skeletal abnormalities especially in children.
• Additional tests: The doctor may order other tests such as calcium, phosphorus, parathyroid hormone (PTH), and alkaline phosphatase levels to ensure there are no complications.
• Bone imaging (DEXA): In advanced cases or when osteoporosis is suspected, bone density imaging may be requested.
• X-rays: In cases of young children or severe cases, bone changes may be visible on X-rays.

Medications

• Vitamin D3 supplements (Cholecalciferol): The primary and first treatment, usually given at doses ranging from 1000-4000 international units daily for adults depending on the degree of deficiency and purpose (corrective or preventive). Treatment duration ranges from 6-12 weeks before rechecking levels.
• Vitamin D2 supplements (Ergocalciferol): Less effective alternative to D3, but may be used in some cases especially severe deficiency requiring high doses.
• Calcium supplements: May be given with vitamin D to improve calcium absorption and strengthen bones, especially in postmenopausal women and elderly.
• Other treatments: In very rare cases that don't respond to standard treatment (such as chronic kidney disease), the doctor may prescribe active forms of vitamin D such as Calcitriol.

Procedures

• No surgical procedures: Vitamin D deficiency requires no surgical intervention. Treatment is entirely medicinal and lifestyle-based.
• Regular follow-up: Patient should return to doctor to recheck vitamin D levels 6-8 weeks after starting treatment to ensure levels are rising, and adjust dose as needed.

Lifestyle Changes

• Increase sun exposure: Try to spend more time in direct sunlight (at least 15-30 minutes daily) while protecting against sunburn. Ideal times are before 10 a.m. and after 3 p.m.
• Eat vitamin D-rich foods: Add fatty fish (salmon, tuna, sardines), egg yolks, sun-exposed mushrooms, and vitamin D-fortified milk to your diet.
• Regular exercise: Regular physical activity improves calcium absorption and bone strength.
• Reduce heavy clothing when possible: Try to balance maintaining modesty with getting adequate sun exposure.
• Visit open areas: Spend some time in parks and open spaces.
• Adhere to treatment: Continue taking supplements as prescribed by your doctor and do not stop before consulting him.

• Osteoporosis: Chronic vitamin D deficiency reduces calcium absorption, leading to bone density loss and increased fracture risk especially in hips and spine. This is a very serious complication especially in postmenopausal women and elderly.
• Osteomalacia (soft bones): An advanced stage of vitamin D deficiency causing severe bone pain and acute muscle weakness, may lead to inability to walk or perform daily activities.
• Rickets in children: In children, severe deficiency causes bone deformities, delayed growth and walking, and may permanently affect physical and motor development.
• Weak immunity and repeated infections: Vitamin D is essential for strengthening immunity, and its deficiency increases susceptibility to infections such as asthma and respiratory infections.
• High blood pressure: Studies show chronic deficiency may be associated with high blood pressure and increased risk of heart disease and stroke.
• Poor growth and development in children: May cause delays in motor and mental development in children.
• Depression and mood disorders: Vitamin D deficiency has been linked to increased depression, anxiety, and psychological disorders.
• Pregnancy and reproductive complications: In pregnant women, deficiency may increase risk of miscarriage, premature birth, and preeclampsia.

• Regular sun exposure: Spend adequate time in direct sunlight (15-30 minutes daily) especially in early morning or afternoon hours, while protecting skin from burns.
• Eat vitamin D-rich foods: Include fatty fish, eggs, fortified milk, and mushrooms in your daily diet.
• Maintain healthy weight: Obesity reduces vitamin D absorption, so maintaining normal weight is very important.
• Exercise regularly: Physical activity improves bone and muscle health and increases vitamin D effectiveness.
• Regular screening: People in high-risk groups (pregnant women, elderly, chronic disease patients) should have blood tests every 6-12 months.
• Preventive supplements: For those who cannot get adequate sun or dietary vitamin D, doctor may recommend preventive supplements at low doses (1000 international units daily).
• Health awareness: Understand the importance of vitamin D and raise awareness especially in communities with high deficiency rates.
• Balance modesty and health: In culturally conservative areas, seek reasonable balance between religious commitment and health need for sun exposure.
• Special guidelines for children: Ensure children get adequate vitamin D especially breastfed and young children.
• Specialist consultation: People with high-risk factors should consult a specialist doctor for customized preventive advice.