Fermaid O is certified organic by OMRI.
It is an autolyzed yeast nutrient with a high content of organic
nitrogen (amino acids). It is formulated without DAP. Two additions
are recommended: half the dose at the end of the lag phase (10-12
hours after pitching the yeast) and the second addition when the
gravity (sugars) is has been depleted by 1/4 to 1/3.