Is Vitamin C worth prioritizing?

A well-known Cochrane review found that regular vitamin C supplementation does not reduce the incidence of the common cold in the general population, though it modestly shortens cold duration and severity — a nuance later confirmed by dedicated meta-analyses of supplementary and higher-dose regimens. Weighing that against the numbers, Vitamin C is not a priority based on current data — the evidence is only emerging (35/100), and its estimated impact (18/100) is on the lower end too.