Ibn al-Qayyim (rahimahullaah), in his Prophetic Medicine, lists fenugreek as one of the simple foodstuffs and medicines that can be used for a variety of conditions These were covered in a previous article on fenugreek. After discussing fenugreek and its beneficial uses, he says:

It's benefits are many times more than what we have mentioned ... Some physicians have said: "If people knew its benefits they would buy it for its weight in gold".

There is considerable research on this topic available and we will present here just one research paper on the subject.

Basch E, Ulbricht C, Kuo G, Szapary P, Smith M. Therapeutic applications of fenugreek. Altern Med Rev. 2003 Feb;8(1):20-7.C.

Fenugreek has a long history of medical uses in Ayurvedic and Chinese medicine, and has been used for numerous indications, including labor induction, aiding digestion, and as a general tonic to improve metabolism and health. Preliminary animal and human trials suggest possible hypoglycemic and antihyperlipidemic properties of oral fenugreek seed powder

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You can download the full paper here, which is in PDF Format: Therapeutic Applications of fenugreek