LD50 stands for?

LD50 stands for?

• A. Lethal dose for half of the population
• B. The lowest dose to cause death in 50% of tests
• C. Lethal dose to 50 minutes
• D. Lethal dose to 50%

Answer: (D)

LD50 is the amount of a substance that would be expected to cause death in 50% of a defined population under specified conditions. It’s a median lethal dose, often expressed as the amount per unit of body weight, and it’s used to compare how toxic different substances are. A smaller LD50 means greater toxicity because a smaller dose is enough to kill half the population. It’s not about the lowest dose that causes death, nor about a time like 50 minutes; it’s specifically the dose corresponding to 50% mortality.

LD50 is the amount of a substance that would be expected to cause death in 50% of a defined population under specified conditions. It’s a median lethal dose, often expressed as the amount per unit of body weight, and it’s used to compare how toxic different substances are. A smaller LD50 means greater toxicity because a smaller dose is enough to kill half the population. It’s not about the lowest dose that causes death, nor about a time like 50 minutes; it’s specifically the dose corresponding to 50% mortality.