Yeast Resources

Good Question! For the most part, all our yeast is not gluten free. However, we occasionally will run a seasonal yeast strain that IS produced on 100% Gluten Free media. These strains will be differentiated by teal/blue packaging and will be clearly labeled, GLUTEN FREE.

For commercial brewers- we can grow any of our yeast strains on 100% gluten free media, please call us for information on order minimums and lead times. 

All Imperial Yeast's products are USDA Certified Organic by Oregon Tilth. Therefore, we cannot use synthetic chemicals, GMO sugars, petroleum-based chemicals, or any other non-organic ingredients to grow our yeast.

Yes, absolutely. Standard fermentations require around 12-15 ppm wort DO. When using A38 Juice, it's important to increase this to at least 20-25 ppm wort DO, or increase the oxygen flow regulator to 50% higher than normal.

Please try to store your yeast at 33-35°F (~1°C). If you accidentally freeze your yeast, thaw slowly: in a refrigerator. Experience has shown that the yeast will survive the freezing and thawing, but we recommend making a starter if this happens.

We recommend using the freshest possible yeast and we back our yeast for 4 months from the manufacture date on the front of the pouch. If you find yourself with a pouch past its expiration date, we recommend making a starter.

This increase is the result of a recent extensive study conducted with multiple strains over the course of several months. We found that the impact on viability was negligible for all our strains at four months from the printed manufacture date. This applied retroactively to all yeast in the marketplace. Expect to see the same reliable, healthy and happy fermentations that you have come to expect from Imperial Yeast.

If you are brewing more than 5 gallons (19L), making a high gravity wort (above 17 °P or 1.070 SG), or have a pack that is older than 4 months then we recommend making a starter. Pitch one pack into either a stirred 2L starter or an unstirred 4L starter.

11 million cells/ml

200 billion cells, designed to inoculate 5 gallons (19L) of standard gravity wort.