Evidence supporting the use of: Camellia sinensis
For the health condition: Congestion

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Camellia sinensis, the plant from which green, black, and other teas are derived, has a long history of traditional use in addressing mild respiratory congestion, often as a hot beverage. The warm liquid itself can help soothe the throat and loosen mucus, while the plant naturally contains caffeine and theophylline—compounds known to have mild bronchodilatory effects. In traditional Chinese and Japanese medicine, tea has sometimes been recommended to help with symptoms of colds, including congestion, though not as a primary treatment. However, there is limited direct scientific research supporting the efficacy of Camellia sinensis specifically for congestion relief. Most available evidence relates to its general antioxidant and anti-inflammatory properties or benefits for cardiovascular health. The mild relief reported anecdotally is likely due to the warmth and hydration provided by the beverage, along with possible minor effects from its alkaloids. In summary, while Camellia sinensis is traditionally consumed for comfort during respiratory illness and may offer some symptomatic relief, robust scientific validation for its use specifically in treating congestion is lacking.

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