Synopsis

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

Nut grass (Cyperus rotundus) has a long history of use in traditional medicine systems, particularly in Ayurveda, Traditional Chinese Medicine (TCM), and other Asian healing practices. In these systems, it is commonly used to address symptoms associated with colds, such as fever, headache, and congestion. The roots and rhizomes are often prepared in decoctions or powders and administered as part of polyherbal formulations intended to "clear heat," "dispel wind," or restore balance during febrile illnesses.

Although nut grass is widely cited in traditional texts for its antipyretic (fever-reducing) and anti-inflammatory properties, the scientific evidence for its use against colds with fever remains limited. A few in vitro and animal studies have demonstrated anti-inflammatory, antipyretic, and mild antimicrobial effects of certain extracts from Cyperus rotundus. However, these studies are preliminary and do not directly address its efficacy for treating viral upper respiratory tract infections or fever in humans. There are no robust clinical trials evaluating nut grass for this specific indication.

Thus, while its use is justified by tradition and supported by anecdotal reports and historical texts, current scientific validation is weak, meriting a moderate-low evidence rating (2/5).

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