Do You Get Enough Vitamin D?

As the weather cools down, it’s tempting to stay cozy indoors, curling up until spring arrives. But in regions with cold, gray winters, those blissful indoor days might come with an unintended side effect: vitamin D deficiency.

Vitamin D, often called the “sunshine vitamin,” is synthesized in the skin when exposed to ultraviolet B (UVB) rays from the sun. It’s essential for calcium absorption and maintaining strong bones, but that’s not all—it also helps reduce inflammation, supports cognitive function, and lowers the risk of autoimmune diseases. During summer, most people can produce enough vitamin D with just a bit of time in the sun—five to ten minutes of midday sun exposure a few times per week can be sufficient for people with fair skin, with longer exposure needed for those with darker skin.

In the winter, however, especially in northern parts of the U.S., the sunlight is often too weak to provide adequate vitamin D. This can lead to widespread deficiencies. According to Nebraska Medicine, nearly 1 in 4 adults in the United States are low in vitamin D, a condition that’s becoming more common. Symptoms of deficiency include fatigue, poor sleep, muscle weakness, bone pain, hair loss, feeling down or sad, a weakened immune system, and even paler skin. If you notice these symptoms, it’s important to contact your doctor, who can check your vitamin D levels with a simple blood test.

Getting Enough Vitamin D
Fortunately, vitamin D deficiency is easily addressed through diet and supplements. Some foods are naturally high in vitamin D, such as:

• Fatty Fish: Salmon, sardines, and mackerel are all great natural sources.
• Egg Yolks: Another natural source of vitamin D.
• Beef Liver: Although less common in modern diets, it’s rich in vitamin D.
• Fortified Foods: Many foods, such as milk, breakfast cereals, and orange juice, are fortified with vitamin D, making them easy ways to boost your intake.

If sunlight and diet aren’t enough, vitamin D supplements can help. They come in two forms—D2 and D3. Studies have shown that vitamin D3 is more effective in raising and maintaining vitamin D levels, so it’s often the preferred choice. For young adults, the recommended dietary allowance is 600 international units (IU) per day, but your doctor can recommend a dosage tailored to your specific needs.

Stay Healthy This Winter
While it may be difficult to get enough vitamin D from the sun during colder months, keeping track of your diet and considering supplements can help you stay healthy. If you’ve been feeling more tired than usual or experiencing other symptoms like muscle aches or low mood, don’t ignore them—ask your doctor if vitamin D might be the missing piece of your winter wellness. Staying mindful of this important nutrient can help you enjoy a healthier, happier winter season.