Srinagar December 17, 2025 – As winter sets in with shorter days and less sunlight, health experts are urging people to prioritize Vitamin D to strengthen immunity and reduce the risk of catching common colds and respiratory infections.
With reduced sun exposure in the colder months, many people experience Vitamin D deficiency, which weakens the immune system. Studies show that low Vitamin D levels are linked to higher rates of upper respiratory tract infections, including the common cold. A major meta-analysis found that Vitamin D supplementation protects against acute respiratory infections, with the strongest benefits in those who are deficient.
Unlike popular belief, Vitamin C – often touted as a cold preventive – does not reliably prevent colds in the general population, though it may slightly shorten their duration (by about 8-14%). Experts recommend getting Vitamin C from foods like citrus fruits rather than mega-doses of supplements.
Why Vitamin D Stands Out in Winter:
- The body produces Vitamin D from sunlight, but in winter, UVB rays are too weak in many regions, leading to widespread deficiency.
- Research, including trials on thousands of participants, shows daily or weekly Vitamin D supplements can cut the risk of respiratory infections by up to 50% in deficient individuals.
- Governments in countries like the UK recommend everyone take Vitamin D supplements from autumn to spring.
Health professionals advise consulting a doctor for blood tests to check Vitamin D levels and discussing supplementation. Foods like fatty fish, eggs, and fortified products help, but supplements are often needed in winter.
While no nutrient is a guaranteed shield against colds, evidence points to Vitamin D as the top priority this season for immune support.
Stay warm, stay healthy!
