Salovum® is a product based on Egg yolk powder B221 which is a form of administering high amounts of exogenous AF protein. The development of Salovum® was a result of the researchers finding that some patients did not respond with induction of AF. It was discovered that hens fed with the AF-inducing feed laid eggs with AF-enriched yolks. For practical reasons a spraydried egg yolk powder was developed. This egg yolk powder given to patients is a form of exogenous administration of the AF protein and it is primarily used for acute treatment or in the initial treatment of patients with severe disease or suspected low levels of AF. The SPC products on the other hand should be considered as maintenance treatment, stimulating the patient’s own production of the AF protein.