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Lallemand Brewing Unveils ISY S-Reduce: The Solution For Correcting Sulfur Off-Flavors
Lallemand Brewing proudly announces the launch of their latest innovation in the AB Vickers™ brand ISY S-Reduce, designed as a simple solution for correcting sulfur off-flavors and aromas in beer.

The AB Vickers™ ISY (Inactivated Specific Yeasts) line is markedly exciting for the brewing industry due to its biologically derived nature, providing natural and unprocessed solutions targeted for brewing.
ISY S-Reduce is an inactivated specific yeast autolysate, rich in biologically bound copper, capable of removing sulfur off-flavors from beer, including hydrogen sulfide (H₂S), dimethyl sulfide (DMS), and mercaptans. The sulfur compounds react with the copper and are removed with the yeast, resulting in a fresh and clean tasting beer. ISY S-Reduce is available in a 1kg pack with a treatment rate of 10-30g/hL.
Key Benefits of ISY S-Reduce
- Reduces and removes hydrogen sulfide (H₂S) from your beer.
- Potential reduction of other sulfur compounds including dimethyl sulfide (DMS) and mercaptans.
- Enhances desirable aroma and flavor compounds.
- Avoid extended maturation to remove sulfur compounds.
- Yeast-based solution.
About AB Vickers
Part of the Lallemand Brewing Business Unit, AB Vickers is a global leader in the field of brewing process aids and related services. With over 200 years of history and expertise, bringing constant technological innovation and expertise, AB Vickers develops, markets and supplies the worldwide beer industry with wort clarification, beer clarification, antifoam, nutrients and more.
Published Jun 3, 2025