Vitamin C appears to reduce the severity of colds and recovery time by 8% in adults and 14% in children.[3] Read more about how you can boost your immune system in our article on high-dose vitamin C supplementation
That is not a secondary benefit
Besides, increased plasma hippuric acid concentrations may be due to increased production of benzoic acids, which is formed during microbial fermentation of plant material containing 3-phenolypropionic acid and other lignin-forming phenolic compounds 28,29
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a separate leave-on product does the actual work of evening out tone over time
The best medication is not always the one with the biggest average result in a study