Ukrain is an alkaloid extract from the plant Chelidonium majus, a common weed. It was developed over 20 years ago by a scientist from the Ukraine, who tested the product on patients with several different types of cancers.
In lab experiments, Ukrain appeared to kill cancer cells while leaving healthy cells alone. Other experiments suggest that Ukrain may stimulate certain aspects of the immune system, but it is uncertain if these effects could occur in humans. Two small studies suggest Ukrain may help advanced pancreatic cancer patients, but additional studies are needed to confirm effects and safety.