Ed50

What is ED50?

ED50 is the dose (concentration of a substance) at which the effect is minimal or completely absent. The concept was introduced in the 1940s by von Hoffmann. This is the dose/effect ratio. Also called the median or 50% effective dose. If you plot the data on graphs, a higher percentage of variants will be on the lower dose side. The median is the value that falls in the middle between the upper and lower values ​​of the sample. Therefore, the average may not be meaningful in some cases where the sample is highly heterogeneous.