SIY 33™ is pure autolyzed, spray dried yeast. It provides alpha amino nitrogen, B vitamins and the benefits of yeast hulls to help sluggish or stuck fermentations. SIY 33 will help supplement the alpha amino nitrogen component of YAN. Add at 1/3 sugar depletion when inorganic nitrogen is NOT desired.

Unlike Fermaid K, SIY 33 does not contain added ammonia salts (DAP) or micronutrients.

To Use: SIY 33 should be mixed with room temperature water before adding to an active fermentation to avoid CO₂ release and overflowing of tanks or barrels. The amount of water used is not critical. Simply add enough to make a slurry.

Storage: Dated expiration. Store at 18°C (65°F). Once opened, keep tightly sealed and dry.

Recommended for use with:  Autolyzed yeast

Recommended Dosage

25 g/hL

2 lb/1000 gal

We will no longer carry this product once current inventory has been depleted. 

This yeast nutrient has been replaced by Fermaid O, which has proven to give superior fermentation and sensory results.

We understand the implications this sudden halt may have on your production schedule and would like to offer our support. If you would like technical assistance, please contact us at (707) 765-6666 or shoot us an email and we will be delighted to talk you through this transition.