top of page
Search

Vitamin D Deficiency

  • Writer: Michael Frey, MD
    Michael Frey, MD
  • Apr 7
  • 2 min read


Vitamin D deficiency occurs when the body does not have enough vitamin D to maintain healthy bones and support other bodily functions. Vitamin D is crucial for calcium absorption and plays a vital role in immune function, cell growth, and inflammation reduction.



Causes

  • Lack of Sunlight Exposure: Vitamin D is often referred to as the "sunshine vitamin" because it is produced in the skin in response to sunlight. Limited sun exposure due to geographic location, lifestyle, or clothing can lead to deficiency.

  • Dietary Insufficiency: A diet low in vitamin D-rich foods, such as fatty fish, fortified dairy products, and egg yolks, can contribute to deficiency.

  • Malabsorption Disorders: Conditions like celiac disease, Crohn's disease, or cystic fibrosis can impair the absorption of vitamin D from food.

  • Obesity: Higher body fat levels can sequester vitamin D, making it less available for use by the body.

  • Age: Older adults may have a decreased ability to synthesize vitamin D from sunlight.



Symptoms

  • Fatigue: A common symptom of vitamin D deficiency.

  • Bone Pain: Low levels of vitamin D can lead to discomfort in bones.

  • Muscle Weakness: Deficiency may contribute to muscle weakness and increased risk of falls.

  • Depression: Some studies suggest a link between low vitamin D levels and mood disorders.

  • Frequent Illness: Vitamin D is important for immune health, and deficiency may lead to increased susceptibility to infections.



Diagnosis

Vitamin D deficiency is typically diagnosed through a blood test that measures the level of 25-hydroxyvitamin D. Levels below 20 ng/mL (50 nmol/L) are generally considered deficient.



Treatment

  • Vitamin D Supplements: Oral supplements are commonly prescribed to restore adequate levels.

  • Dietary Changes: Increasing intake of vitamin D-rich foods can help improve levels.

  • Sunlight Exposure: Safe sun exposure practices can aid in natural vitamin D synthesis.




Prevention

  • Regular Sun Exposure: Aim for about 10-30 minutes of sunlight several times a week, depending on skin type and location.

  • Fortified Foods: Include foods fortified with vitamin D in your diet.

  • Regular Check-ups: Monitor vitamin D levels, especially in high-risk populations.

 
 
bottom of page