What Do People Know and Believe about Vitamin D?

Area of Science:

• Nutrition Science
• Public Health
• Epidemiology

Background:

• Widespread information on vitamin D has led to concerns about insufficiency.
• Understanding public knowledge and beliefs regarding vitamin D is crucial.

Purpose of the Study:

• To assess vitamin D-related knowledge and beliefs in a large French adult population.
• To identify key information providers and factors influencing knowledge accuracy.

Main Methods:

• Cross-sectional study of 59,273 French adults from the NutriNet-Santé cohort.
• Utilized a specific questionnaire to evaluate vitamin D knowledge and beliefs.
• Weighted data by French sociodemographic distribution and analyzed using chi-squared tests.

Main Results:

• Participants demonstrated inaccuracies in identifying vitamin D sources (e.g., sun exposure, fatty fish) and established health effects (e.g., bone health).
• Incorrect sources and unproven health effects (e.g., skin cancer) were frequently mentioned.
• Knowledge varied significantly by age, generation, and socioeconomic factors.
• A notable discrepancy existed between participants' actual vitamin D status and their self-perceived status.

Conclusions:

• Significant gaps and inaccuracies exist in public understanding of vitamin D sources and health effects.
• Physicians and media are primary information sources, but communication needs improvement.
• Tailored, up-to-date communication strategies are essential for both the public and healthcare professionals to address vitamin D misinformation.