每日耐受量（英语：Tolerable Daily Intake，简称TDI），是指在生物体的体内，每天所能容忍摄入的最大毒物质量，如果超出每日的耐受量，则会对身体造成伤害。

中国大陆早在2008年6月就有传出受害案子，却因为在举办北京奥运，所以被隐藏起来，在九月才被当地媒体揭发，才知道除了三鹿还有很多黑心毒奶粉业者，9月12日传出添加三聚氰胺的奶粉已经流入台湾，引起毒奶粉风暴，但是这些黑心奶粉却已经卖到各地，将近卅万婴儿罹患肾结石。

Tolerable daily intake (TDI) refers to the daily amount of a chemical that has been assessed safe for human being on long-term basis (usually whole lifetime). Originally acceptable daily intake (ADI) was introduced in 1961 to define the daily intake of a food additive which, during the entire lifetime, appears to be without appreciable risk. For contaminants and other foreign chemicals not used intentionally, the term TDI is often preferred. Both ADI and TDI are usually assessed based on animal experiments, and it is most often hundred times lower dose than the dose causing no observable adverse effect (NOAEL) in the most sensitive tested animal species. Because the uncertainty factors (safety factors) may vary depending on the quality of data and the type of adverse effect, TDI values are not good estimates of the harmfulness of chemicals, and must be considered administrative tools to set allowable limits for chemicals, rather than scientific measures.