* Horsehair is not meant for consumption. It's a foreign material to the human body and not digestible.
* Potential for choking hazard. The bristles are long and can easily lodge in your throat, causing serious breathing problems.
* Risk of bacterial contamination. The brush is likely to harbor bacteria, especially if it's been used to marinate raw meat. This can lead to food poisoning.
* Chemical exposure. Some brushes are treated with chemicals to make them waterproof or more durable. These chemicals can be harmful if ingested.
It's crucial to remember that brushes are tools for cooking, not food. If you've accidentally ingested a bristle, it's best to contact your doctor or poison control immediately.