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]