The Green Pasture company was founded in the USA from Dave and Barbera Wentz in the late last century. They were inspired by the research of Dr. Weston A. Price and they started making small boutique batches of raw Fermented Cod Liver Oil.
According to the research Dr. Price always gave Cod Liver Oil with Butter Oil, extracted by centrifuge from good quality spring or fall butter. He found that Cod Liver Oil on its own was relatively ineffective but combined with organic Butter Oil produced excellent results.
To make the product better they added butter oil made from milk from cows raised on healthy sustained pasture.
They then added this concentrated butter oil directly to the Fermented Cod Liver Oil and this product became is known as the, Blue Ice Royal Blend. These products are available in either liquid, gel or capsule form.
They also produce Fermented Skate Liver Oil and skin care balms.