Document Type : Original Article
Department of Clinical Pharmacy, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
Faculty of Pharmacy and Pharmaceutical Sciences, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
Background: Results of studies in Iran indicated a high prevalence of vitamin D deficiency, making its rational use to be critical. So assessing people’s knowledge about the rational use of vitamin D and its safety is worthwhile to pursue. This study aimed to evaluate the level of consumers’ knowledge about vitamin D and its relationship with vitamin D serum levels in Tehran, Iran.
Methods: A cross-sectional survey was designed to assess consumers’ knowledge and its association with demographic characteristics, lifestyle, habits and the serum 25-hydroxy vitamin D3 (25(OH)D) level in 10 community pharmacies in Tehran, Iran.
Results: Totally, 384 individuals participated in this study, among whom 345 (89.8%) requested large doses of vitamin D. The average knowledge score was 23.67±7.76 out of 50. The average serum level of vitamin D was 49.01±32.01 ng/mL, showing that 117 (30.5%) subjects were in “insufficient”, 224 (58.1%) were in “sufficient”, and 44 (11.4%) were in “hypervitaminosis” levels. There was a significant inverse association between knowledge and age, weight, body mass index (BMI), educational level, vitamin D serum level, and monthly dose. Also, a significant inverse relationship was detected between knowledge in terms of toxicity and vitamin D level. Further, participants’ knowledge of “hypervitaminosis” was lower than those with “sufficient” level.
Conclusion: More than 50% of consumers had a sufficient knowledge on vitamin D level, however the lack of knowledge about vitamin D was evident that could lead to misuse and hypervitaminosis, which were noticed in 11.4% of participants.
Ghader Mohammadnezhad (Google Scholar)
Hadi Esmaily (Google Scholar)