Biological method of obtaining a food preparation with a base of haem iron, as well as the food preparation obtained by implementing the method

1) Biological method of obtaining a food preparation with a base of haem iron, specifically adapted for the treatment of iron deficiency, from animal's blood, for example pig's blood or cow's blood or alternatively derivatives thereof such as cruor, characterised by the following successive steps:

• a first fraction of animal's blood is subjected to a process of controlled enzyme hydrolysis to obtain a first hydrolysate containing haem iron complexed with large-sized peptides as well as populations of peptides not complexed with the haem iron;
• the first hydrolysate thus obtained is enriched to obtain haem iron-peptide complexes by ultra-filtration in order to remove peptide populations not complexed with the haem iron and to obtain a hydrolysate solution enriched with haem iron-peptide complexes;
• in parallel, a second fraction of animal's blood is subjected to a process of advanced enzyme hydrolysis to obtain a second hydrolysate containing haem iron complexed with small peptides as well as populations of peptides not complexed with the haem iron;
• the second hydrolysate thus obtained is centrifuged in order to remove a large proportion of the small peptides not bonded to the haem and obtain a centrifuged residue with a very high haem concentration;
• the centrifuged residue is rendered soluble, in particular by adding soda, to obtain an extrinsic solution of haem in which the haem is bonded to small-sized peptides;
• the hydrolysate solution enriched with haem iron-peptide complexes is mixed with the extrinsic haem solution to enable the extrinsic haem to fix on the large-sized peptides of the hydrolysate solution and release the small peptides bonded to the extrinsic haem;
• the resultant mixture is centrifuged in order to remove the extrinsic haem which has not fixed to the large-sized peptides;
• and
• the resultant solution is enriched with haem iron-peptide complexes by ultra-filtration in order to remove the small peptides released during the mixing step.