An aquatic or semi-aquatic leafy vegetable with hollow tender stems and arrow-shaped leaves, central to the everyday cooking of Southeast Asia and southern China. The hollow, crunchy stems and soft greens cook in minutes and absorb sauces readily.
History & Origins
Water spinach has been cultivated in southern China for well over two millennia, with written references appearing by the Liang dynasty and depictions on Han-era tomb tiles. It spread through maritime trade routes into Indochina, the Malay archipelago, the Philippines, and India, where it became a staple market vegetable. European naturalists catalogued it in the 18th and 19th centuries, but it remained a regional crop until Chinese diaspora communities introduced it across the Pacific and Indian Ocean littorals.
Nutrition Facts
Per 100 g, edible portion (estimated)
- 19 kcalCalories
- 2.6 gProtein
- 0.2 gFat
- 3.1 gCarbs
- 2.1 gFiber
- 0.4 gSugars
- 312 mgPotassium
- 77 mgCalcium
- 1.7 mgIron
- 55 mgVitamin C
- 800 mcgVitamin A
Culinary Uses
- Stir-fried with garlic, shallots and sambal in Indonesia, Malaysia and Singapore (cah kangkong, kangkung belacan)
- Sweated in adobo or sinigang-style broths in the Philippines (sinigang sa kangkong)
- Sautéed with fermented soybean or yellow bean paste in Cantonese and Teochew cooking
- Added to Thai curries, laab and boat-noodle soups as a finishing green
- Quickly blanched and served cold with sesame or fish-sauce dressings in Vietnam (rau muống xào tỏi)
Known Benefits
- One of the richest leafy sources of beta-carotene (vitamin A) per 100 g
- Provides a substantial amount of vitamin C for immune and collagen support
- Good plant source of non-heme iron and bioavailable calcium
Hidden Benefits
- Contains ipomeanol-related flavonoids and phenolic compounds studied for anti-inflammatory and hepatoprotective activity in rodent models
- Naturally high in chlorophyll and lutein, which may support eye health
- Provides a small amount of mucilaginous polysaccharides that can soothe the digestive tract in traditional Chinese dietary theory
Cautions & Considerations
- Grown in still or polluted water it can accumulate heavy metals and parasites; always cook thoroughly
- Raw or undercooked plants harvested in endemic regions have been linked to the intestinal fluke Fasciolopsis buski
- Classified as an invasive aquatic weed and is restricted or banned in several U.S. states including Florida and California
- Contains oxalates and should be eaten in moderation by those prone to kidney stones
