"Expert-backed tips for boosting vitamin D levels and staying healthy during winter"

Vitamin D deficiency is a common issue, with about 35% of adults in the US being deficient. Factors such as working indoors, limited sun exposure, and certain medical conditions can contribute to deficiency. Vitamin D plays a crucial role in calcium and bone maintenance, and recent studies suggest it may also impact energy levels and mood, particularly in relation to seasonal affective disorder. Symptoms of deficiency can include bone pain, fatigue, and low energy. To increase vitamin D levels, it is important to incorporate foods high in vitamin D or fortified with it, such as milk, yogurt, and fatty fishes. Sun exposure is also beneficial, but sunscreen should be used. Supplements and cod liver oil can be taken under medical guidance.