Acute respiratory viral infection
Not recommended
The 2014 Cochrane review (Karsch-Völk et al., 24 RCTs, over 4,600 participants) concluded that convincing evidence for echinacea in cold prevention or symptom reduction is lacking. Some studies show a borderline effect, but methodological heterogeneity and risk of bias preclude a general conclusion. , , and guidelines do not list the product.