Why does traditional Chinese medicine recommend eating carp less frequently?

Under normal circumstances, carp is considered in Traditional Chinese Medicine (TCM) as a "trigger food" that may promote inflammation and blood disturbances. It is believed to stimulate internal wind, increase phlegm, trigger toxicity, fuel fire, and strengthen pathogenic factors, potentially worsening existing illnesses or causing their recurrence. Reasons why TCM advises limiting carp consumption may include poor digestion, allergic constitution, damp-heat constitution, excessive liver fire, and certain medical conditions. Detailed explanations are as follows:

1. Poor Digestion

Carp has firm flesh and high protein content. For individuals with weak spleen and stomach function or poor digestive capacity, excessive consumption may increase gastrointestinal burden and lead to indigestion. Those with spleen deficiency should avoid eating too much carp and instead choose easily digestible foods such as millet porridge, pumpkin, and Chinese yam. In terms of herbal remedies, medicinal substances like Atractylodes (Bai Zhu), Dried Tangerine Peel (Chen Pi), and Poria (Fu Ling) can be used to strengthen the spleen and regulate digestion.

2. Allergic Constitution

Carp contains components that may trigger allergic reactions. Individuals sensitive to proteins may experience allergic symptoms or have existing allergies worsened after consuming carp. People known to be allergic should avoid such foods and medications, or substitute them with non-allergenic alternatives.

3. Damp-Heat Constitution

In TCM theory, carp is regarded as a warming and tonifying food that may easily generate dampness and heat. For individuals who already have an internal damp-heat constitution, excessive consumption may aggravate symptoms such as bitter taste in the mouth, bad breath, sticky stools, and skin eczema. Other possible symptoms include dry mouth and throat, dark yellow urine, and a yellow, greasy tongue coating. Patients should follow medical advice and use herbs such as Poria (Fu Ling), Alisma (Ze Xie), and Plantago Seed (Che Qian Zi) that promote diuresis and resolve dampness. Maintaining a light diet and reducing intake of oily, spicy, and sweet foods—known to contribute to damp-heat—is also important.

4. Excessive Liver Fire

Patients with excessive liver fire can regulate their condition through dietary and medicinal adjustments. Excess liver fire refers to hyperactivity of liver function manifesting as heat signs, often related to emotional stress, diet, or heat transferred from other organs to the liver meridian. Since carp is warm in nature and tends to fuel internal heat, overconsumption may exacerbate symptoms such as headache, red eyes, and irritability. Common accompanying symptoms may include dizziness, tinnitus, dry mouth, flushed face, and red eyes. Under medical guidance, herbs such as Bupleurum (Chai Hu), Gentiana (Long Dan Cao), and Prunella (Xia Ku Cao) may be used to clear liver heat and purge fire.

5. Medical Conditions

Patients with gout should exercise caution, as carp contains purine compounds. Consumption may elevate purine levels in the body, leading to uric acid accumulation and triggering or worsening gout attacks. Under medical advice, patients should increase intake of vegetables and fruits, drink plenty of water to boost urine output, and reduce blood uric acid levels. Protein intake should be limited, and low-purine foods are recommended. Foods rich in vitamins B and C should be prioritized to help dissolve uric acid in tissues.

In daily life, whether carp is suitable for consumption should be determined based on individual constitution and health status. When eating carp, moderation and balanced dietary combinations are essential.