Most People Have A Vitamin D Deficiency For Unexpected Reasons

Key Points:

• Approximately 60% of people worldwide do not get enough vitamin D, which is essential for bone health, muscle function, and may play a role in cancer prevention, immune function, cardiovascular health, and dementia.
• It is challenging to obtain sufficient vitamin D from diet alone, as common sources like fatty fish, egg yolks, and fortified foods typically provide only 100 to 400 IU daily, which is often inadequate.
• Sun exposure is a key factor in vitamin D production, but factors such as time of day, air pollution, use of sunscreen, less outdoor activity, aging skin, and darker skin tones reduce the body's ability to produce vitamin D.
• Certain health conditions (e.g., celiac disease, liver or kidney disease) and some medications can impair vitamin D absorption or metabolism, increasing the risk of deficiency.
• Due to difficulties in obtaining enough vitamin D from food and sun exposure, supplementation with vitamin D3 is often recommended, but individuals should consult a healthcare provider to avoid potential toxicity from excessive intake.