Nutritious.

Isinglass is also called fish maw. The biological small molecule collagen protein contained in fish swim bladder is the raw material for the human body to supplement and synthesize protein. And easy to absorb and utilize. It is stored in human tissues in the form of aqueous solution, thereby improving tissue nutritional status and accelerating metabolism. It has been proven that foods rich in collagen can affect the physiological functions of certain specific tissues through the binding of water by collagen, thereby promoting growth and development, enhancing disease resistance, delaying aging and resisting cancer. In China's Han Dynasty, there were medicinal books that recorded the medicinal effects of "fish bladder"; in the Tang Dynasty, it was used as one of the tributes. The theory of traditional Chinese medicine is that "fish bladder" has nourishing effects; it is a good product for women's skin care and health care. Medical research has found that "fish maw" contains a large amount of vitamins and a variety of trace elements, among which the vitamin A content exceeds that of other fish products, which is good for beauty and calcium supplementation. (Quoted from: Baidu Encyclopedia, "fish maw" entry.)

When the fish maw is fried, some of the protein will be destroyed, so the amount of collagen will be reduced accordingly. Oil used for frying is a high-energy substance, so after frying, the amount of energy provided by the swim bladder will increase. Since vitamins will be inactivated by high temperature treatment, the vitamin content will be reduced accordingly. Vitamin A is a fat-soluble vitamin and will dissolve in oil, so the judgment will also be lost.