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Evidence level for primary prevention and treatment of COVID-19 in micro-nutrient deficient and non-deficient people (–: no effect; +/−: uncertain, + positive, +++: strong evidence).
| Nutrient | Prevention in Deficient | Treatment Deficient |
Prevention Non-Deficient |
Treatment Non-Deficient |
|---|---|---|---|---|
| Vitamin C | +++ | +/− | – | – |
| Vitamin D | ++ | +/− | – | – |
| Fe | +++ | +++ | – | – |
| Se | ++ | +/− | – | – |
| Zn | ++ | +/− | – | – |
| n-3 PUFA | +++ | +/− | + | – |
