Plant atlas Short
Water Chestnut Stays Crunchy After You Cook It
Water Chestnut · แห้ว · Eleocharis dulcis
Water Chestnut — แห้ว (haeo) — Eleocharis dulcis.
It stays crunchy even after you cook it, because its corm's cell walls resist softening with heat, while many cooked vegetables soften fast. The part you eat is the corm. In cell-culture studies, peel extract showed antibacterial activity. Inside the corm you'll find potassium, manganese, vitamin B6, copper, and fiber. Potassium supports normal blood pressure and muscle and nerve function; manganese helps build bone and turn food into energy; vitamin B6 helps make red blood cells and run everyday energy metabolism; copper helps the body put iron to use; and fiber adds bulk that helps you feel full and keeps digestion moving. Thai cooks build desserts around that crunch: for Thapthim Krob, diced corm is coated in tapioca and served cold in sweet coconut milk, often with jackfruit; for Tako Haew, the corm sits in a soft pandan pudding under salted coconut cream, set in little cups folded from pandan leaves. It grows like rice. It grows in flooded mud, so where water-borne parasites are a risk, eat water chestnuts only after cooking.
Thapthim Krob — ทับทิมกรอบ (tap-tim-krob)
Tako Haew — ตะโก้แห้ว (ta-go-haew)
Food and nutrients
Rich in: potassium, manganese, vitamin B6, copper, fiber
Research context
Water chestnut peel flavonoids show antioxidant and antibacterial activity — Eur Food Res Technol, 2014 (cell-culture study)
Sources
Source: Zhan G, Pan LQ, Mao SB, Zhang W (2014). Antibacterial properties of Eleocharis dulcis peel extracts. Eur Food Res Technol 238. DOI:10.1007/s00217-013-2151-2
Narration transcript
Opening
Most vegetables go soft the moment they hit heat. The water chestnut holds its crunch — right through boiling, stir-frying, even canning. Water chestnut — แห้ว, haeo. The trick is in its cell walls, laced with a heat-proof compound called ferulic acid that refuses to break down. The part you eat is the crisp white corm, peeled and diced into stir-fries or sweet coconut desserts.
Thapthim Krob (ทับทิมกรอบ)
Thai cooks build desserts around that crunch. In thapthim krob, the diced corm is coated in tapioca and served cold in sweet coconut milk, often with jackfruit.
Tako Haew (ตะโก้แห้ว)
In tako haew, the same corm sits in a soft pandan pudding under a layer of salted coconut cream, set in little cups folded from pandan leaves.
Nutrition summary
In that crisp white corm, the standouts are vitamin B6 and riboflavin, backed by a bit of manganese and potassium.
Potassium
Potassium helps with normal fluid balance and muscle function.
Manganese
Manganese helps the body use food for energy and maintain normal connective tissue.
Vitamin B6
Vitamin B6 contributes to normal energy metabolism, supports a healthy nervous system, and helps your body make red blood cells.
Copper
Copper helps your body use iron and maintain normal connective tissue.
Fiber
Fiber adds bulk to meals and can help with fullness.
Closing
It grows down in flooded paddy mud, much like rice. One caution if you're where water-borne parasites are common: the corm's skin can pick up a parasite called a fluke, so always peel and cook water chestnuts before eating, and skip them raw. Follow Longevity Biome, and LIKE this video for regular updates.
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