stylistic:tone
Amygdalin

Apple seeds contain small amounts of amygdalin, a sugar and cyanide compound known as a cyanogenic glycoside. Ingesting small amounts of apple seeds causes no ill effects, but consumption of extremely large doses can cause adverse reactions. It may take several hours before the poison takes effect, as cyanogenic glycosides must be hydrolyzed before the cyanide ion is released. The U.S. National Library of Medicine 's Hazardous Substances Data Bank records no cases of amygdalin poisoning from consuming apple seeds.