Coconut water forms when the endosperm of a coconut fruit doesn’t completely fill the embryo sac cavity during cellularization. The liquid that remains in the cavity is coconut water.

Here’s more information about the formation of coconut water:

  • Endosperm The liquid in a young coconut is the endosperm, which is the food that nourishes the coconut as it grows.

  • Cellularization During the initial stages of cell division, the endosperm cells divide rapidly without forming walls, resulting in coconut water.

  • Maturation As the coconut matures, the endosperm transforms. Part of it hardens into the coconut’s white flesh, or copra, while the remaining liquid becomes coconut water.

  • Composition Coconut water contains vitamin B complex, amino acids, living enzymes, calcium, potassium, phosphorus, magnesium, and sodium.

  • Buko juice In Philippine English, coconut water from young green coconuts is called buko juice

Inside the coconut is the endosperm. There is free nuclear endosperm and cellular endosperm. During the initial stages of cell division, the endosperm cells divide rapidly without wall formation which is what we know as coconut water.

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