The use of "Pungent Principles" to support the Lungs body system is justified primarily by traditional evidence, particularly within the context of Traditional Chinese Medicine (TCM) and other herbal systems. Pungent principles refer to compounds responsible for the sharp, spicy, or aromatic qualities in certain herbs and foods—such as those found in ginger, garlic, mustard, horseradish, and various members of the Allium and Brassicaceae families. In TCM, herbs with pungent or acrid properties are often used to "disperse lung Qi," resolve phlegm, and promote the circulation of energy, which is believed to help expel pathogens and relieve symptoms like congestion or cough. Classic texts describe pungent herbs as helpful for the early stages of respiratory infections and for treating wind-cold type illnesses that affect the lungs. While there is some overlap with Western herbal traditions, the justification is largely rooted in historical and empirical use rather than rigorous clinical studies. Scientific research does exist on specific pungent compounds (e.g., allicin in garlic, gingerols in ginger) for their antimicrobial or anti-inflammatory effects, but the direct link between "pungent principles" as a category and support for lung health remains primarily traditional. Therefore, the evidence rating is moderate (3/5), reflecting strong historical use but limited direct scientific validation for the category as a whole in supporting lung function.