Fenugreek seeds (Hulba)
حِلْبَة
Preparation: Soak one tablespoon of fenugreek seeds in warm water overnight, consume the seeds and water on empty stomach in the morning, or grind into powder and take half teaspoon twice daily with warm water
Duration: Minimum 3 months for hormonal regulation
Source: Ibn al-Qayyim, At-Tibb an-Nabawi, Chapter on Seeds and Grains; noted for its properties in regulating menses and improving metabolic heat
