Made a pot roast and when I lifted the meat out, there were these weird stringy white threads clinging to it and floating in the liquid. They’re almost like tiny worms but not moving. Is my meat conta

2. Collagen, Connective Tissue, and Why They Turn Stringy
Collagen is a protein found in connective tissues of animals and is particularly abundant in tougher cuts of meat like chuck or brisket. When slow-cooked, collagen breaks down over time, turning into gelatin. This process is what gives pot roast its rich mouthfeel and tender texture.
As collagen dissolves, it can form stringy threads that are more noticeable in the liquid. Cooking the meat at a low temperature for a longer duration, such as 3-4 hours at 325°F (163°C), helps break down these fibers completely, minimizing their stringy appearance.