Long Eggplant Peel: The Nasunin Pigment Inside

Long Eggplant — มะเขือยาว (ma-khuea-yao) — Solanum melongena.

Long eggplant — mah-kue-ah-yao. Its glossy purple peel contains nasunin, a plant pigment. The edible part is the fruit. In a lab test, nasunin bound iron and slowed fats from oxidizing. The fruit also brings fiber, manganese, and potassium. Fiber keeps digestion regular and helps you feel full, and in a fiber-rich meal it slows how fast sugars are absorbed. Manganese is a mineral your body uses to help turn food into energy and support normal bones. Potassium helps muscles and nerves work normally and supports normal blood pressure. Yam Ma Khuea Yao chars the eggplant until it slumps and softens, tossing the smoky flesh with lime juice, fish sauce, and minced pork. Pad Ma Khuea Yao stir-fries the sliced fruit in a screaming-hot wok with garlic, chilies, and sweet basil until blistered and tender. How to cook long eggplant: keep the purple skin on to preserve the nasunin-rich peel. Pick long eggplant while the skin still shines; dull skin usually means seedy, bitter flesh.

Yam Ma Khuea Yao — ยำมะเขือยาว (yam-ma-khuea-yao)
Pad Ma Khuea Yao — ผัดมะเขือยาว (pad-ma-khuea-yao)

Food and nutrients

Rich in: fiber, manganese, potassium

Research context

Nasunin, eggplant's antioxidant pigment, chelates iron & protects lipids from peroxidation — Res Commun Mol Pathol Pharmacol, 1998 (cell-culture study)

Sources

Source: Noda Y et al. (1998). Antioxidant activity of nasunin. Res Commun Mol Pathol Pharmacol 102(2):175-87. PMID 10100509

Narration transcript

Opening

Long eggplant — มะเขือยาว, ma-kua-yao. That mirror-glossy purple skin is where a plant pigment called nasunin sits, so Thai cooks char and stir-fry the fruit with the peel left on. The whole fruit is what you eat. A shining skin means sweet, firm flesh.

Yam Ma Khuea Yao (ยำมะเขือยาว)

Yam makhuea yao is a grilled long eggplant salad that tosses the charred, softened fruit with lime juice, fish sauce, and minced pork, then serves it with steamed jasmine rice.

Pad Ma Khuea Yao (ผัดมะเขือยาว)

Pad makhuea yao is a fast stir-fry that sends sliced long eggplant into the wok with garlic, chilies, and Thai sweet basil, served hot over steamed jasmine rice.

Nutrition summary

Skin on, this glossy fruit is a modest source of fiber and manganese, with a little copper and folate.

Fiber

Fiber adds bulk to meals and can help with fullness.

Manganese

Manganese helps the body use food for energy and maintain normal connective tissue.

Potassium

Potassium helps with normal fluid balance and muscle function.

Closing

Cook the fruit with its purple skin on to keep that nasunin-rich peel. Pick long eggplant while the skin still shines — a dull finish means the fruit has gone seedy and bitter, and frequent picking keeps new ones coming. Follow Longevity Biome, and LIKE this video for regular updates.

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