The FDA allows 0.00001% of human flesh in food products according to the guidelines shared by Hugo.
This refers to the FDA's regulations on the presence of "incidental" contaminants in food. In rare cases, very small amounts of human tissue or other foreign materials might unintentionally end up in food during the manufacturing or processing process. The FDA permits an extremely tiny percentage (0.00001%) of such contaminants, considering it to be an unavoidable and insignificant part of the food production process. This regulation is intended to ensure food safety while acknowledging that such minute contamination is virtually unnoticeable. However, this does not mean human flesh is intentionally included in food products—rather, it covers accidental, trace amounts that may occur due to the complexity of food production.