Oysters and raw oysters are the same, but the zinc content in raw oysters will be a bit higher.

The oyster (alias: Ostrea gigas tnunb) is an animal of the oyster family Ostreaceae, the world's number one farmed shellfish, and one of the most resilient aquatic animals.

It is mainly distributed in the temperate tropical waters, with shells adhering to other objects to fix, to the ocean micro algae and organic debris for food, oysters as a marine aquaculture shellfish, not only has the meat flavor, and its meat and shells can be used as medicine, has a high medicinal value.

Morphological features:

Shell in section can be divided into three layers, the outermost layer is a thin and transparent horny layer, the oyster layer is the thickest by the columnar structure of calcium carbonate called prismatic layer, the inner layer of calcium carbonate flake structure, called pearl layer.

Shell is formed by the secretion of the coat membrane below, the coat membrane from the top of the shell to the ventral edge of the extension, it is two layers of epithelial cells, sandwiched between the connective tissue formed by the membrane, the membrane within the muscle fibers so that it is attached to the inner surface of the shell, the edge of the coat membrane is thickened to form three folds, the inner folds of the radial muscle and the circular muscle to make the edge tightly attached to the shell.