The seeds of freshly picked aronia berries contain bonded hydrogen cyanide, also known as “amygdalin”. This bonded hydrogen cyanide is released when the seeds are chewed. Fresh berries have an average amygdalin content of around 200 mg per kilo – a very small amount. The recommended daily intake of dried aronia berries is 1 to 2 tablespoons (15 g). You’d have to eat several kilos of fresh aronia berries and chew all of the seeds to notice a harmful effect.