LOAEL (Lowest Observed Adverse Effect Level)

LOAEL, or Lowest Observed Adverse Effect Level, is the smallest amount of a substance or exposure that causes detectable harmful effects in humans or animals. It helps experts understand at what point a chemical or pollutant begins to pose health risks. Researchers identify LOAEL through studies, and it is used to guide safety standards and regulations, ensuring exposures stay below levels that could cause adverse effects. Essentially, LOAEL marks the starting point of observed harm, serving as a critical reference for protecting health and safety.