Process for manufacturing yeast strains having increased mannan oligosaccharides and improved amino acid profiles

A process for producing a yeast with increased levels of amino acids and complex carbohydrates including mannan oligosaccharides comprising:

• providing a seed yeast, a sugar source, air, and nutrients to at least one propagator;
• propagating said seed yeast in said propagator creating a propagation medium therein;
• providing at least a portion of the propagation medium, the sugar source, the air and the nutrients to at least one fermenter;
• fermenting said propagation medium in said fermenter creating a fermentation medium therein, wherein the fermenting produces CO2 and a ratio of oxygen to CO2 in a top portion of the fermenter is maintained at from about 2 to about 6;
• separating a yeast cream from the fermentation medium;
• and
• drying the yeast cream to produce a yeast product,
• wherein the sugar source comprises from about 70 wt-% to about 80 wt-% DP1 sugar, from about 5 wt-% to about 15 wt-% DP2 sugar, from about 5 wt-% to about 15 wt-% DP3 sugar, and from about 1 wt-% to about 10 wt-% DP4 sugar.