Synopsis

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

Coltsfoot (Tussilago farfara) has a long history of traditional use for respiratory ailments, especially to support or treat lung congestion. Historical records from European herbal medicine, as well as Traditional Chinese Medicine (where it is known as "kuan dong hua"), describe its use as an expectorant and demulcent—meaning it helps soothe the respiratory tract and promote the expulsion of mucus. The leaves and flowers of coltsfoot have been prepared as teas, syrups, or smoked for relief of coughs, bronchitis, and congestion.

Scientific studies on coltsfoot are limited. Some laboratory research indicates that its mucilage content may help soothe irritated mucous membranes and that its constituents (such as tussilagine and isotussilagine) may have mild anti-inflammatory and expectorant effects. However, there is a lack of robust, controlled clinical trials in humans to confirm its efficacy for lung congestion.

Safety concerns also exist. Coltsfoot contains pyrrolizidine alkaloids, compounds that can be toxic to the liver if taken in significant amounts or over prolonged periods. Because of this, some countries restrict its use in herbal remedies.

In summary, coltsfoot’s use for lung congestion is primarily justified by traditional knowledge, with some plausible mechanisms suggested by preliminary scientific studies, but not enough high-quality evidence to fully endorse its safety or effectiveness for this purpose.

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Products containing coltsfoot

Nature's Sunshine Breathe Activator TCM (formerly Breathe E-Z)
Nature's Sunshine Chinese TCM Positive Pack