Vitamin D deficiency is common in India, despite the country's sunny climate. Experts Dr. Vyankatesh Shivane and Dr. Vimal Pahuja highlight the risks associated with high-dose vitamin D supplementation, particularly when taken over extended periods. They define high doses as exceeding 50,000 IU per day, which can lead to toxicity, characterized by symptoms such as nausea, thirst, and muscle weakness. Safe vitamin D levels are considered to be between 20-40 ng/mL, with levels above 100-150 ng/mL posing health risks like kidney stones and cardiac issues. Regular monitoring is crucial; testing should occur before starting supplements and again after 8-12 weeks. After initial correction, an annual check is recommended to ensure levels remain stable. Additionally, natural sunlight exposure of 45-60 minutes daily can help maintain adequate vitamin D levels without the need for excessive supplementation.