? process for producing high af-16 egg yolk? The present invention relates to a process for producing an egg yolk with a very high antisecretory factor (af) protein content, in particular with a very high af protein fragment content consisting essentially of the amino acid sequence as shown. id.seq.no.1 (af-16) and / or id seq.no.2 (af-8), said process comprising at least 4 weeks feeding a bird, such as a chicken, a pelleted feed by af-16 induction for poultry comprising at least 0.14% free tryptophan, such as 1-2 g tryptophan / kg feed and subsequently harvesting egg from said birds, separating egg yolk from egg white and alternatively spray drying, grinding, leaching, extraction, evaporation, membrane filtration and / or egg yolk freeze drying. The present invention further relates to said egg yolk with a very high antisecretory factor (af) protein content produced according to the process described herein and to the use for the preparation of functional food products and pharmaceuticals for the treatment of and prophylaxis of abnormal physiological conditions caused, for example, by exceptionally high levels of body fluid evacuation. The invention also relates to food products and pharmaceutical products thus prepared.?processo para produzir gema de ovo com alto teor de af-16? a presente invenção refere-se a um processo para produzir uma gema de ovo com um teor muito elevado de proteínas do fator antissecretório (af), em particular com um teor muito elevado de fragmento de proteína af que consiste essencialmente na sequência de aminoácidos como mostrado no id.seq.no.1 (af-16) e/ou no id seq.no.2 (af-8), compreendendo o referido processo durante pelo menos 4 semanas alimentando uma ave, como uma galinha, uma alimentação peletizada por indução de af-16 para aves compreendendo pelo menos 0,14% de triptofano livre, como 1-2 g de triptofano/kg de alimento e, posteriormente, colhendo ovo das referidas aves, separando a gema de ovo da clara de ovo e alternativamente com
