Vitamin D deficiency in children remains a significant pediatric issue directly linked to the development of rickets, mineral metabolism disorders, and bone tissue alterations. Although this condition is traditionally viewed as a bone pathology, modern scientific data demonstrate its systemic impact on the child's body, including the immune system and the functioning of internal organs [1], [7].
Why Does Vitamin D Deficiency Occur?
Vitamin D acts as a prohormone, playing a key role in regulating calcium and phosphorus levels, as well as modulating immune responses through specific receptors (VDR) [1], [7]. The main causes of its deficiency include insufficient sun exposure, an unbalanced diet, and metabolic peculiarities. Prolonged deficiency leads to impaired bone mineralization, which is clinically manifested by the classic signs of rickets, and in severe cases, to secondary hyperparathyroidism and systemic failures [3].
Impact on the Heart and Muscular System
Severe hypocalcemia and vitamin D deficiency can lead to dangerous metabolic disorders affecting the cardiovascular system. Medical practice describes cases where severe nutrient deficiency in adolescents caused secondary hyperparathyroidism and reversible left ventricular dysfunction [3]. Timely correction of calcium, magnesium, and vitamin D levels successfully restores cardiac activity [3].
Systemic Effects and Associated Risks
Vitamin D deficiency in children and adolescents often accompanies various autoimmune and inflammatory processes. Studies show a high prevalence of deficiency in autoimmune thyroid pathologies [1], rheumatic diseases [7], and severe forms of autoimmune hepatitis, where adequate 25(OH)D levels correlate with a better response to therapy [8]. Additionally, vitamin D is important for maintaining eye health [4] and normal metabolism [5].
Prevention and Condition Correction
Timely diagnosis and replenishment of vitamin D deficiency are crucial for preventing rickets and long-term complications. Preventive measures include:
- Monitoring serum 25-hydroxyvitamin D levels.
- Dietary correction and regular outdoor exposure.
- Prescribing safe dosages of vitamin D supplements under medical supervision.
- Timely treatment of concomitant metabolic disorders.
Sources
- 1. Vitamin D deficiency is common in Hashimoto's thyroiditis, while VDR FokI shows subtype-specific association with gravis disease in Jordan: a case-control study
- 2. Potential Role of Omega-3 Supplementation in Modulating Symptoms and Holter Parameters in Pediatric Inappropriate Sinus Tachycardia
- 3. Reversible Severe Left Ventricular Dysfunction in an Adolescent With Vitamin D Deficiency-Associated Hypocalcemia and Secondary Hyperparathyroidism: A Case Report
- 4. Vitamin D and Ocular Diseases: A Systematic Review
- 5. Vitamin D Deficiency and Replacement Challenges in Type 1 Gastric Neuroendocrine Tumors: A Comparative Study
- 6. Skin Hyperpigmentation as Initial Manifestation of Vitamin B12 Deficiency: A Case of Delayed Diagnosis With Late-Onset Subacute Combined Degeneration of the Cord
- 7. Vitamin D and Autoimmune Rheumatic Diseases
- 8. Have serum vitamin D and ferritin a role in predicting the prognosis of autoimmune hepatitis treatment in children?
Disclaimer: The information is for reference purposes and does not replace an in-person consultation with a pediatrician.