Pokok petai belalang (Leucaena leucocephala), also known as petai cina, is widely eaten as a vegetable ("ulam") in Malaysia and Indonesia. Besides its nutritional value, it has a long history of use in traditional medicine.
Traditional medicinal uses
Different parts of the plant (especially the seeds, leaves, bark, and roots) have traditionally been used for:
- Diabetes – boiled seeds are traditionally consumed to help lower blood sugar.
- Intestinal worms – seeds and leaves have been used as a traditional anthelmintic.
- Inflammation and swelling – leaf poultices are applied to inflamed areas.
- Wound healing – crushed leaves are used on minor wounds.
- Kidney inflammation – used in some traditional herbal preparations.
- Digestive health – believed to help promote bowel movements.
- Bone fractures – used in some folk remedies to support healing, although evidence is limited.
Modern research
Research has identified several bioactive compounds, including flavonoids, alkaloids, saponins, tannins, and triterpenoids. Laboratory and animal studies suggest that extracts of Leucaena leucocephala may have:
- Antidiabetic activity, with improvements in blood glucose levels in animal models.
- Antioxidant effects.
- Anti-inflammatory activity.
- Antibacterial effects against certain microorganisms.
- Anthelmintic (anti-worm) properties.
- Potential anticancer activity in laboratory studies
