Tag: Fibroin

Approximately 70-80% of raw silk is composed of a fibrous protein called fibroin, with the remaining 20-30% consisting of a glue-like protein, sericin. Understanding what is silk protein made of reveals the complex biochemical architecture behind this famously luxurious and durable natural fiber.

Processed silk protein powders and hydrolysates have been consumed as food additives and traditional medicines for many years, primarily in parts of Asia. Contrary to what the textile connection might suggest, specific forms of silk protein are not only edible but also prized for their unique properties in the food industry. But what makes this fibrous biopolymer safe to eat?

Derived from the silkworm cocoon, silk consists of two primary proteins: fibroin and sericin, which have been recognized for their incredible cosmetic applications for centuries. Understanding what are the benefits of silk protein can help you elevate your beauty routine for healthier-looking skin and hair.

Over 5,000 years ago, ancient Chinese cultures discovered that silk was a strong, natural fiber spun by silkworms. At its core, this celebrated material is indeed composed entirely of protein, giving it its unique characteristics and luxurious feel.

Comprising up to 80% of its weight, silk fibers are predominantly a natural protein called fibroin. This protein, along with another called sericin, is secreted by silkworms and is the fundamental building block of the luxurious fabric, confirming that yes, silk does contain protein.

A fascinating fact of molecular biology is that the average human body contains over 100,000 different types of proteins, each with a unique three-dimensional shape. A key level of this organization is the secondary structure, which provides an example of a secondary protein in action, like the helical keratin in our hair.