Does zinc help with the common cold?
In this meta-analysis of randomized controlled trials, zinc supplementation was not shown to reduce the risk of getting a cold. In participants who already had a cold, zinc lozenges and nasal sprays reduced the duration of illness by approximately 2.4 days but increased the risk of adverse events such as stomach upset.
Could a personalized supplement reduce the incidence or severity of respiratory infections?
Does adding synbiotics to infant formula reduce the risk of infections?
No effect of vitamin D on preventing respiratory tract infections in older adults
Xylitol for ear infections, respiratory infections, and dental cavities
Bovine colostrum for upper respiratory tract infections in children
Garlic and onion for preventing upper respiratory tract infection