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What are the functions and benefits of fennel?

Aug 06, 2025 Source: Cainiu Health
Dr. Yu Yongchao
Introduction
In general, the effects and benefits of fennel mainly include warming the kidneys and dispersing cold, regulating qi to harmonize the stomach, promoting digestion, relieving dysmenorrhea, and alleviating cold-induced pain. Fennel is warm in nature and should not be consumed excessively by individuals with yin deficiency and excessive internal heat, as it may exacerbate internal heat. As a dietary therapy ingredient, fennel cannot replace medication for treating diseases; prompt medical attention is required if symptoms are severe. Consultation with a healthcare professional is recommended before consumption by special populations.

Generally speaking, the effects and functions of fennel mainly include warming the kidney and dispersing cold, harmonizing the stomach and regulating qi, promoting digestion, relieving dysmenorrhea, dispelling cold, and alleviating pain. Detailed analysis is as follows:

1. Warm the kidney and disperse cold

Fennel has a warm nature and pungent taste. It can warm and invigorate kidney yang, dispel cold pathogens in the lower jiao, and alleviate discomforts such as cold pain in the waist and knees, and cold distension in the lower abdomen caused by insufficient kidney yang and invasion of cold pathogens. When cold pathogens stagnate in the lower jiao, consuming fennel can help warm the kidneys and reduce discomfort caused by cold.

2. Harmonize the stomach and regulate qi

Fennel can regulate the qi of the spleen and stomach, and alleviate symptoms such as abdominal distension, belching, and acid regurgitation caused by disharmony of stomach qi. When qi stagnation occurs in the spleen and stomach, consuming fennel can harmonize stomach qi, smooth the flow of qi in the gastrointestinal tract, and improve gastric discomfort.

3. Promote digestion

Fennel contains volatile oils that can stimulate the secretion of saliva and gastric juice, enhance gastrointestinal motility, accelerate food digestion and absorption, and improve poor appetite and indigestion. When appetite is poor, moderate consumption of fennel can stimulate appetite and promote digestive function.

4. Relieve dysmenorrhea

Fennel can warm and invigorate the meridians, dispel cold, and alleviate dysmenorrhea and cold pain in the lower abdomen caused by cold-induced blood stasis. When experiencing related discomfort during menstruation, consuming fennel can help promote blood circulation and alleviate pain symptoms.

5. Dispel cold and relieve pain

Fennel can expel internal cold pathogens and alleviate cold pain in limbs and joints, and pain caused by hernia due to cold pathogens. When pain is caused by cold pathogens, consuming fennel can help eliminate cold pathogens, relieve pain, and improve physical comfort.

Fennel is warm in nature and should not be consumed in excessive amounts by individuals with yin deficiency and fire hyperactivity, as it may exacerbate internal heat. As a dietary therapy ingredient, fennel cannot replace medication for treating diseases; prompt medical attention is required if symptoms are severe. Individuals in special populations should consult a healthcare professional before consumption.

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