I have studied this plant. I did not find any major scientific study that will support fennel seed use in detoxification. However, it is a herb popular in Traditional Chinese Medicine. Fennel is believed to strengthen eyesight, relieve cough, assist in digestion, and treat stomach ailments and menstrual and respiratory disorders. A poultice made from fennel was externally applied as a remedy for snake and scorpion bites. The Chinese believe that fennel brings balance to qi. Fennel was used in traditional Chinese medicine as a laxative to treat cold and liver, kidney, and spleen ailments.

Fennel’s medicinal properties have been consolidated to include antioxidative, cytotoxic, anti-inflammatory, anti-microbial, bronchodilatory, estrogenic, diuretic, lithotriptic, galactagogue, emmenagogue, anti-thrombotic, hypotensive, gastroprotective, hepatoprotective, memory enhancing, and anti-mutagenic properties (Rahimi et al., 2013).

Fennel seeds were analyzed and were rich in antioxidants with a value of 1.95% (Oktay et al., 2003). Its anti-tumor property has been studied, and initial results validate it (Pradhan et al., 2008). The antioxidant and anti-carcinogenic properties are mentioned. (Mohammad et al., 2011; and de Marino et al., 2007)

Fennel extracts were found to kill human leukemia cells. (Bogucka-Kocka et al., 2008).

Additional reading references:

Holy Herbs: Modern Connections to Ancient Plants

Asian Herbs and their wondrous health-giving properties from nature

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