The whole plant is poisonous, but berries usually play the greatest risk, as they are sweet and tend to attract children. 10 – 20 berries can kill an adult, but it only takes 1 leaf (in which the poisons are much more concentrated) to kill a full grown man.Strangely, our very “intelligent” ancestors of the Elizabethan era (1500s) used Belladonna as part of their daily cosmetic routine. They used drops made from the plant as eye drops, to dilate their pupils, which was considered attractive and gave the user a dreamy look. Not being very knowledgeable at the time, the women also drank cyanide, or “bled” themselves to obtain a pale, translucent skin color, in addition to painting their faces white with a lead based paint called cerise.