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India’s Vitamin D Deficiency: 30–50% Population Below 20 ng/dl Despite Sunlight
India reports widespread vitamin D deficiency, with 30–50% of the population having vitamin D levels below 20 ng/dl despite abundant sunlight. It's highlight reported causes, health impacts, and treatment-related points including fortification limits, testing, supplementation follow-up, and intake ranges.
Vitamin D Deficiency in India :
| Dimension | Key Details |
|---|---|
| Vitamin D threshold reported | Deficiency provides for vitamin D levels < 20 ng/dl. |
| Vitamin D status (ng/dl) | Deficiency: < 20; Insufficiency: 21–30; Sufficiency: 31–75; Toxic levels: > 100. |
| Vitamin type | Vitamin D comprises a fat-soluble vitamin. |
| Other fat-soluble vitamins listed | Fat-soluble vitamins comprise Vitamins A, K, and E (along with Vitamin D). |
| Characteristic of fat-soluble vitamins | Fat-soluble vitamins are more difficult to excrete and can cause toxicity if taken in excess. |
| Types of Vitamin D | Vitamin D comprises Vitamin D2 (Ergocalciferol) and Vitamin D3 (Cholecalciferol). |
| Vitamin D2 (Ergocalciferol) | Vitamin D2 is found in small amounts in almonds and mushrooms. |
| Vitamin D3 (Cholecalciferol) | Vitamin D3 is found in large concentrations in animal products such as fish, egg, liver. |
| Diet-related point | Vitamin D levels are generally poor in vegetarian diets. |
| India-specific prevalence | In India, 30–50% has vitamin D levels below 20 ng/dl, higher than in developed countries such as the UK and the US. |
| Reported reasons | Poor exposure to sunlight, atmospheric pollution, vegetarian diets, and lack of fortification of dairy products. |
| Vitamin D receptors | Found in almost all human tissues. |
| Physiological roles | Vitamin D provides for roles in bone and mineral metabolism, immunity, and mood regulation. |
| Effects | Poor balance and muscle weakness, and a higher risk of falls in older adults. |
| Deficiency | Increased susceptibility to respiratory tract infections, tuberculosis, cardiovascular disorders, and metabolic disorders like diabetes. |
| Food fortification | Cost-effective strategy used in many countries; it requires widespread testing to detect toxicity, which is not available in India. |
| Treatment | A follow-up blood test is usually done 2–3 months after starting supplementation. |
| Children & adults | Children and adults: 600–800 IU/day. |
| Elderly Requirement | Elderly: 800–1000 IU/day. |
| Pregnant women | Pregnant women: 1000–1200 IU/day. |