The Silent Burden of Vitamin D Deficiency in Kashmir

Credit By: DR FIZAH HAMID

• Faizan Qureshi
• Comments 0
• 25 Apr 2026

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Unmasking a widespread yet overlooked cause of fatigue, bone pain, and declining health in the Valley

In recent years, a quiet yet significant health concern has been steadily emerging across Kashmir. Patients—young and old alike—are increasingly presenting with vague, often overlooked complaints such as persistent fatigue, generalised body aches, low mood, and reduced stamina. Many undergo multiple investigations, only to be reassured that their reports are “normal.” Yet, beneath these seemingly nonspecific symptoms lies a common and frequently missed diagnosis: Vitamin D deficiency.

In a region known for its breathtaking landscapes but limited sunlight exposure for much of the year, this deficiency is no longer incidental—it is becoming a silent burden on public health. This paradox of widespread deficiency despite available sunlight highlights the dominant role of behavioural and environmental factors. Epidemiological data demonstrate that Vitamin D deficiency is widespread in Kashmir, impacting a significant segment of the population across all age demographics.

A cross-sectional study of tribal populations in the area found that about two-thirds of people were deficient. Studies of apparently healthy adults have found that the prevalence rates are over 80%. Alarmingly, data from children show even higher rates, with more than 90% of school-aged children being deficient. The high burden in Kashmir is mostly due to not getting enough ultraviolet B light because of long winters, less time spent outside, and cultural practices that limit sun exposure. In summary, these data show that the region's lack of vitamin D is not a coincidence but a serious and underappreciated public health issue.

Why is Vitamin D Deficiency Common in Kashmir?

• Geographical Location- Higher latitude reduces effective UVB radiation, especially during winter months.
• Prolonged Winters- Short daylight hours + weak sunlight result in inadequate cutaneous Vitamin D synthesis.
• Climatic Conditions- Frequent cloud cover, fog, and snow further limit UVB penetration.
• Indoor Lifestyle- the harsh weather conditions lead to reduced outdoor activity for a large part of the year.
• Clothing Practices- Extensive body coverage, particularly during winter and in certain sociocultural settings, limits skin surface area exposed to sunlight, thereby reducing cutaneous Vitamin D synthesis despite being outdoors.
• Lifestyle Changes- Increased screen time and sedentary habits reduce sunlight exposure even in summer.
• Lack of Awareness and preventive practices- Many individuals are unaware of the importance of adequate sunlight exposure, optimal timing (midday), and the need for supplementation, leading to delayed diagnosis and persistent deficiency.
• Dietary habits- Limited intake of Vitamin D-rich foods, traditional diets may be low in fortified products, which results in further deficiency of Vitamin D.

Source and Synthesis of Vitamin D

Vitamin D is mainly made in the skin, not from food. The ultraviolet B (UVB) rays in sunlight change 7-dehydrocholesterol in the skin into previtamin D₃, which quickly turns into cholecalciferol (vitamin D₃). This goes through hepatic hydroxylation to become 25-hydroxyvitamin D [25(OH)D], which is the main form that circulates in the body. Then, it goes through renal conversion to become the biologically active form, 1,25-dihydroxyvitamin D (calcitriol). Most individuals derive the majority of their Vitamin D from cutaneous synthesis via sunlight, while dietary sources contribute only a minor proportion.

Clinical Importance of Vitamin D

Beyond its classical role in calcium–phosphate homeostasis and skeletal integrity, Vitamin D functions as a pleiotropic hormone with receptors (VDR) expressed in multiple tissues, including immune cells, skeletal muscle, pancreas, and the central nervous system. Recent research highlights its role in immune modulation, enhancing innate immunity while regulating adaptive responses—an effect that has been associated with reduced susceptibility to acute respiratory infections and potential modulation of autoimmune activity.

Emerging evidence suggests that having enough Vitamin D may help with muscle strength and function, lower the risk of falls in older people, and improve metabolic health, such as insulin sensitivity and blood sugar control. In neuropsychiatric fields, insufficient Vitamin D levels have been linked to mood disorders and cognitive impairment, although the causal relationship is still being explored. These findings collectively highlight Vitamin D as a multifaceted regulator, significantly influencing various systems beyond skeletal health.

Consequences & Clinical Manifestations of Vitamin D Deficiency:

• General Symptoms- Persistent Fatigue and low energy. Diffuse body aches and nonspecific musculoskeletal pain. Reduced stamina and easy fatigability. Symptoms often occur despite normal routine blood reports.
• Musculoskeletal system- Generalized Bone Pain, Proximal Muscle Weakness, Chronic deficiency results in Osteomalacia in adults and Rickets in children. Decreased Bone Mineral Density.
• Immune system- Increased susceptibility to acute respiratory infections. Association with recurrent infections and delayed recovery. Possible role in the modulation of autoimmune diseases.
• Neuropsychiatric effects- Low mood, irritability, depressive symptoms. Cognitive slowing and mental fatigue. Association with depression and anxiety disorders.
• Metabolic & endocrine effects- Association with insulin resistance and type 2 diabetes. Possible link with metabolic syndrome. Emerging evidence of role in cardiovascular risk (hypertension, endothelial dysfunction).

Oncological associations (emerging evidence)- The association between Low Vitamin D and an increased risk of cancers such as Colorectal Cancer, Breast Cancer, and Prostate Cancer has been observed (observational studies). Vitamin D affects the processes of cell proliferation, differentiation, apoptosis, and angiogenesis through Vitamin D Receptors that are expressed in several tissues. There are some big trials suggesting its role in lowering mortality from cancer; however, its role in preventing cancer incidence is still controversial.

Currently, there is sufficient proof for Vitamin D being a modifying factor.

Numerous individuals remain asymptomatic despite deficiency. Symptoms are not specific and can be easily misattributed. A high index of clinical suspicion is required for diagnosis. Recent studies consistently indicate that Vitamin D deficiency is not merely a bone disorder, but a multisystem condition with extensive clinical ramifications.

Diagnosis of Vitamin D Deficiency:

The diagnosis of Vitamin D deficiency is primarily established by measuring serum 25-hydroxyvitamin D [25(OH)D] levels, which represent the most reliable indicator of total body Vitamin D status. According to Endocrine Society guidelines, levels below 20 ng/mL are considered deficient, 20–30 ng/mL insufficient, and values above 30 ng/mL sufficient for optimal health.

According to Endocrine Society guideline:

• Deficiency: < 20 ng/mL
• Insufficiency: 20 – 29 ng/mL

• Sufficiency (optimal): 30 – 100 ng/mL

• Possible toxicity: > 100 ng/mL

• Toxicity (clinically significant): > 150 ng/mL
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However, early vitamin D deficiency is not characterised by any abnormalities in the common biochemical parameters since serum calcium and phosphate concentrations will usually still be in the normal range. High levels of alkaline phosphatase and secondary hyperparathyroidism (elevated levels of parathyroid hormone) may occur as compensatory mechanisms in certain cases of vitamin D deficiency. Early radiographic changes are not present in patients with vitamin D deficiency, although the characteristic changes seen in osteomalacia can be seen in later stages.

Management of Vitamin D Deficiency

Vitamin D deficiency can be managed through pharmacotherapy, lifestyle modifications, and preventive measures. For patients with confirmed vitamin D deficiency, cholecalciferol (vitamin D₃) is typically prescribed in high doses (such as 60,000 IU per week for 6-8 weeks). After that, a lower dose is continued (for instance, 1,000-2,000 IU per day) to maintain appropriate concentrations. If required, calcium supplements could be prescribed to patients who do not have sufficient amounts of calcium in their diet. In addition to pharmacotherapy, other measures include increased exposure to sunlight (for instance, 15-30 minutes, three or four times per week at midday). As mentioned above, vitamin D deficiency is prevalent in Kashmir, which implies the importance of preventive supplementation, particularly for high-risk groups such as older people, women with minimal sun exposure, and people with an indoor lifestyle. Vitamin D (in small doses, for example, 800-1,000 IU per day) can be prescribed safely and effectively. However, high doses should be avoided because of potential toxicity.

However, it is crucial to emphasise that unsupervised or excessive self-consumption of Vitamin D supplements can be harmful. Prolonged intake of high doses without medical indication may lead to hypervitaminosis D, resulting in hypercalcemia, which can manifest as nausea, vomiting, constipation, polyuria, confusion, and in severe cases, renal impairment and vascular calcification. Therefore, supplementation should ideally be guided by clinical assessment and, where appropriate, serum 25(OH)D levels, ensuring a safe and individualised approach to both treatment and prevention.

Vitamin D deficiency in Kashmir is more than an incidental finding—it represents a silent yet pervasive health burden shaped by geography, lifestyle, and limited awareness. What often begins as mild fatigue or vague body aches may reflect a deeper physiological imbalance with far-reaching consequences on skeletal, metabolic, and overall health.

In a region where sunlight is available yet underutilised, the problem needs to be approached through prevention rather than mere acknowledgement. Through education and proper utilisation of sunlight, the effects of this deficiency can be minimised. Addressing Vitamin D deficiency is not merely about correcting laboratory values, but about enhancing the well-being of the people.

Sometimes, the simplest cure is just stepping into the sun.

(The Author is an MBBS and a health columnist. Email - drfizahhamid@gmail.com )