Objective: To review the evidence supporting complementary and alternative medicine approaches to treatment and prevention of the common cold in adults.
Main message: For prevention, vitamin C demonstrated benefit in a large meta-analysis, with possibly increased benefit in patients subjected to cold stress. Zinc lozenges were effective in 5 of 9 trials, likely owing to dose and formulation issues. Conclusion: Vitamin C can be recommended to Canadian patients for prevention of the common cold.
2020 Ahead of print Jun 1;28(2):192-197.