text: why do they sell peaches without a warning label???? i have heard for years that peaches have cyanide poison on the inside of the peach seed. i have heard that the "big" seed on the inside when cracked open contains another seed that contains it..that is really scary considering i ate one earlier and the "big" seed was missing- is this really true????? i think there is cyanide in peach seeds ... but you'd have to eat several for any effects...don't sweat it. you ate a lot worse today.