Vitamin C
Vitamin C is beneficial in pneumonia treatment, cellular functions, collagen synthesis in connective tissues, immune support against pathogens and oxidative stress[21]. Vitamin C is well-known as an antioxidant that can offset oxidative stress effects by reducing antioxidant enzymes and consequently oxidative damage increase[22]. Vitamin C may act as a weak antihistamine agent to aid COVID‐19 syndromes such as running nose, swollen sinuses and sneezing, which is highly found in several fruits and vegetables like oranges, broccoli and blackcurrants.