The meat looks soft and brown, while pale strands remain embedded inside it.

To someone unfamiliar with meat anatomy, those strands may look like something that does not belong there.

But connective tissue is a normal component of animal muscle.

What Does Collagen Have to Do With It?

Collagen is one of the major structural proteins found in connective tissue.

It plays an important role in the structure of meat.

During slow cooking, heat and moisture gradually alter collagen. Given enough time, some collagen breaks down into gelatin.

This transformation is one of the reasons slow-cooked beef can become so tender and rich.

However, the process is not necessarily uniform throughout the entire roast.

Some areas may contain more connective tissue than others.

Certain strands may also be thicker or more resistant to breakdown.

As a result, you may notice white or translucent pieces remaining after cooking even when most of the roast has become extremely soft.

What looks like a mysterious object may therefore be a structural component of the meat that has simply become more noticeable during cooking.

Why It Can Look Like a Worm