Pulled my beef roast out of the slow cooker and saw these weird white stringy things poking out of the meat. They look like little worms or parasites. Is the meat infested?

11. When to Toss the Roast and When It’s Safe to Eat

If your roast has been cooked to the proper internal temperature and does not exhibit signs of spoilage—such as a bad odor, unusual color, or a slimy texture—it should be safe to eat. The white strings themselves are not harmful and are a normal part of the cooking process.