Table 2.

Nutrient’s supplementation suggested in support of respiratory infections

Nutrient	Recommended supplementation suggested in support of respiratory infections
Omega 3 fatty acids	2–4 g/day [68]
Vitamin D	20,000–50,000 IU [154]
Vitamin E	135 mg/day [114]
Zinc	30–50 mg/day [98]
Selenium	25–100 μg/day [130]
Arginine and glutamine	25–35 g/day [142, 146]
Vitamin C	1–2 g/day [98]
Vitamin A	900–700 µg/day [91]
Iron	8–18 mg/day [138]