ULTRA-LOW DIACETYL

Fresh™

Fresh strains make cleaner tasting beer that judges and beer drinkers prefer. Until now, brewers have relied on imperfect methods for reducing total diacetyl, a distracting off-flavor that can impact quality at even very low levels. Our Fresh strains are engineered to produce the ALDC enzyme inside the cell, a reliable method that’s robust to process variation. Diacetyl rests are shortened, beer is packaged sooner, fewer forced tests are required, and above all, your customers will enjoy a beer that’s so fresh and so clean.

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FRESH Chico

If you’re using a California ale yeast in your brewery, then switching to Fresh Chico is pure upside. Cleaner beer in less time.

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Engineered trait

Prevents diacetyl formation

Parent strain

Chico Ale

Temperature range

64-72° F

Attenuation

80-90%

Flocculation

Med

Haze

Low

Pitch rate

750,000 - 1,500,000 Cells/mL/Degree Plato

FRESH London

Fresh London makes hazy, clean, full-bodied beer, that is free of distracting off-flavors. Let the juice notes pop.

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Engineered trait

Prevents diacetyl formation

Parent strain

London Ale

Temperature range

64-72° F

Attenuation

70-75%

Flocculation

Med

Haze

High

Pitch rate

750,000 - 1,500,000 Cells/mL/Degree Plato

FRESH Andechs

Fresh Andechs is your go-to lager strain for making a variety of easy-drinking classic styles, including Helles, pilsner, and dark lagers. Low sulfur, low diacetyl, and easy to harvest and repitch. A brewery workhorse.

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Engineered trait

Prevents diacetyl formation

Parent strain

Andechs Lager

Temperature range

50-62° F

Attenuation

72-75%

Flocculation

Med

Haze

Low

Pitch rate

1,500,000 - 2,500,000 Cells/mL/Degree Plato

LICENSING ONLY

FRESH Hazy Chico

Fresh Hazy Chico produces the same clean profile that you get from Fresh Chico, except this strain also produces a stable haze. It’s the perfect strain for hazy West Coast IPAs and other hazy styles.

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Engineered trait

Prevents diacetyl formation

Parent strain

Chico Ale

Temperature range

64-72° F

Attenuation

80-90%

Flocculation

Med

Haze

High

Pitch rate

750,000 - 1,500,000 Cells/mL/Degree Plato

LICENSING ONLY

FRESH Augustiner

Fresh Augustiner produces complex and rich lagers with accentuated malt character. A touch of biscuit and a dash of sulfur.

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Engineered trait

Prevents diacetyl formation

Parent strain

Augustiner Lager

Temperature range

50-62° F

Attenuation

72-75%

Flocculation

Med

Haze

Low

Pitch rate

1,500,000 - 2,500,000 Cells/mL/Degree Plato

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Turning Off Unwanted Flavors: How Berkeley Yeast’s Fresh Strains Create Low Diacetyl IPAs and Lagers

Turning Off Unwanted Flavors: How Berkeley Yeast’s Fresh Strains Create Low Diacetyl IPAs and Lagers

Like most brewers, Danny Priddy has a pretty discerning palate. The director of brewing operations at Riip Beer Company in Huntington Beach, California, is particularly sensitive to diacetyl, an or...

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