In toxicology, the LD_Lo (Lethal Dose Low) is the lowest dosage per unit of bodyweight (typically stated in milligrams per kilogram) of a substance known to have resulted in fatality in a particular animal species. When quoting an LD_Lo, the particular species and method of administration (e.g. ingested, inhaled, intravenous) are typically stated.

See also

• Lowest published toxic dose (TD_Lo)
• Semilethal dose (LD₅₀)
• Lethal dose

Toxicology