Vitamin D levels can drop due to a variety of factors, including lack of sun exposure, certain medical conditions, certain medications, and dietary deficiencies. Lack of sun exposure is the most common cause of low vitamin D levels, as the body needs sunlight to produce the vitamin. Medical conditions such as Crohn’s disease, cystic fibrosis, and celiac disease can also lead to low vitamin D levels. Certain medications, such as anticonvulsants, glucocorticoids, and cholestyramine, can also interfere with vitamin D absorption and lead to low levels. Lastly, dietary deficiencies of vitamin D can lead to low levels of the vitamin.

What stops vitamin D absorption?

Vitamin D absorption can be affected by a variety of factors, including inadequate sunlight exposure, certain medical conditions, and certain dietary components. Inadequate exposure to sunlight is the most common cause of vitamin D deficiency, as the body needs sunlight to produce its own vitamin D. Certain medical conditions can also interfere with vitamin D absorption, such as Crohn’s disease, celiac disease, cystic fibrosis, and liver or kidney diseases. Additionally, certain dietary components can interfere with vitamin D absorption, such as calcium, soy, and some high-fiber foods.

Is vitamin D deficiency serious?

Yes, vitamin D deficiency can cause serious health problems. Vitamin D plays an important role in keeping your bones, teeth, and muscles healthy. A lack of vitamin D can lead to a weakened immune system, increased risk of certain diseases like cancer, and an increased risk for bone fractures. It is important to ensure that you are getting enough vitamin D through diet and/or supplements.