Research progress on comprehensive utilization of squid skin.

Squid belongs to the cephalopod class of mollusks, with short survival time, fast reproduction speed, comprehensive nutrition, high protein content, low-fat content, and low-calorie content. Squid skin accounts for 8% - 13% of squid processing waste, and full utilization of squid skin can prevent resource waste. This article reviewed the nutritional components, peeling methods, extraction methods of collagen and gelatin from squid skin, as well as the preparation methods of squid skin collagen peptides with antioxidant activity, antihypertension, anti-skin aging, anti-tumor activity, and anti-freezing activity. The application of squid skin collagen products in industries such as food, medicine, cosmetics, and cosmeceuticals was also introduced. This article provided a systematic introduction to the research progress in the processing and utilization of squid skin, aiming to provide a theoretical basis for the deep processing of squid skin and promote the sustainable and healthy development of China's aquatic product processing industry. In the future, the research should focus on optimizing the extraction process of squid skin collagen, improving the targeting of its target peptide screening, and conducting active clinical validation studies, to provide reference for the development and high-value utilization of squid skin. [ABSTRACT FROM AUTHOR]