Table 4.
The prevalence of the most commonly used dietary supplements before and during the COVID-19 pandemic.
| Before the Pandemic (%) | During the Pandemic (%) | Type of Study | Country | References | |
|---|---|---|---|---|---|
| Vitamins | 27.7 | 58.0 | Cross-sectional (online questionnaire) | Algeria | [49] |
| Vit. D | 7.1 | 22.4 | |||
| Vit. C | 19.8 | 53.1 | |||
| Minerals | 18.4 | 50.0 | |||
| Zinc | 4.6 | 44.9 | |||
| Magnesium | 11.5 | 18.9 | |||
| Selenium | 0.8 | 6.1 | |||
| Others | 9.0 | 12.6 | |||
| Omega 3 | 4.2 | 9.7 | |||
| Vitamins | Cross-sectional (questionnaire-based) | Saudi Arabia | [51] | ||
| Vit. D | 34.6 | 35.1 | |||
| Vit. C | 48.8 | 68.4 | |||
| Vitamins | Cross-sectional (online survey) | Saudi Arabia | [50] | ||
| Vit. D | 20.6 | 18.7 | |||
| Vit. C | 12.5 | 14.9 | |||
| Multivitamin | 24.6 | 44.9 | |||
| Minerals | |||||
| Zinc | 1.3 | 4.6 | |||
| Vitamins | Cross-sectional (online survey) | Lebanon | [48] | ||
| Vit. D | 35.5 | 41.0 | |||
| Vit. C | 35.3 | 42.1 | |||
| Vit. E | 15.2 | 17.5 | |||
| Minerals | |||||
| Zinc | 18.8 | 29.3 | |||
| Vitamins | Cross-sectional | Turkey | [52] | ||
| Vit. D | 10.7 | 5.5 | |||
| Vit. C | 14.2 | 41.1 | |||
| Minerals | |||||
| Calcium | 0.2 | 0.2 | |||
| Zinc | 0.2 | - |