• Ultra-High Zinc Concentration: Provides 5.5–6.5% bioavailable elemental zinc—one of the highest yeast-bound concentrations available for maximum metabolic activation.
• Enhanced Fermentation Kinetics: Accelerates sugar metabolism and ethanol conversion for faster attenuation and a significantly reduced lag phase.
• Superior Yeast Health: Stabilizes cell membranes and reinforces stress tolerance, ensuring high viability in high-gravity brews and repitched batches.
• Optimized Flavor Profile: Promotes clean fermentation by reducing harsh fusels and balancing ester production for a more refined finished product.
• Absolute optimum value for delivering zinc to your yeast. 

CellarScience FermZn Plus is an advanced yeast-derived nutrient designed to correct zinc deficiencies and restore complete fermentation performance. Zinc is one of the most critical trace elements in brewing and fermentation science it serves as a catalytic cofactor for key enzymes, including alcohol dehydrogenase, which is essential for ethanol production and redox balance. Yeast cells depend on zinc to stabilize cellular membranes, regulate stress-response proteins, and maintain the structural integrity of enzyme complexes involved in sugar metabolism. When zinc is limited, fermentation slows, higher alcohols and esters become unbalanced, and yeast viability declines especially in high-gravity or repitched conditions.

FermZn Plus delivers an exceptionally concentrated level of zinc 5.5–6.5 % w/w elemental content—representing one of the highest bioavailable zinc concentrations achievable in a yeast-bound form. This massive zinc load ensures full metabolic activation of zinc-dependent enzymes, stabilizes cellular membranes, and enhances redox control, even in the most demanding high-gravity or nutrient-limited fermentations.

By supplying zinc in a yeast-bound, bioavailable form, FermZn Plus bypasses the poor solubility of inorganic zinc salts, allowing yeast to uptake and utilize it efficiently throughout the entire fermentation cycle. The result is faster attenuation, reduced lag phase, cleaner flavor development, and healthier yeast for subsequent repitches.

• Bioavailable Zinc Complex: Delivers 5.5–6.5 % w/w elemental zinc bound within a yeast matrix for direct metabolic utilization among the highest yeast-bound zinc concentrations in fermentation science.

• Supports Alcohol Dehydrogenase Activity: Enhances the enzymatic conversion of acetaldehyde to ethanol for complete fermentation and reduced off-flavors.

• Accelerates Sugar Metabolism: Improves glycolytic pathway efficiency, leading to faster attenuation and reduced residual sugars.

• Protects Yeast Cell Structure: Reinforces membrane stability, improving osmotic and ethanol tolerance under stress.

• Improves Repitching Viability: Maintains intracellular zinc reserves for consistent fermentation performance across multiple generations.

• Optimizes Flavor Balance: Reduces harsh fusel formation while promoting desirable ester synthesis for a refined fermentation profile.

• YAN Neutral: Provides essential micronutrients without altering total nitrogen contribution or impacting nutrient balance.

Recommended Usage

• Dose: 0.5–1 g/hL (0.019–0.038 g/gal), adjusted based on wort gravity and yeast stress level
• Preparation: Dissolve in sterile water prior to use
• Addition: Add during the final 10–15 minutes of the boil, or directly to sterile wort at pitch
• High-Gravity Beers
• Cider & Mead
• Wine & Fruit Wines
• Distillation Washes
• Serial Repitching

Technical Data

• Zinc Content: 5.5–6.5 % w/w (yeast-bound)
• Composition: Yeast-derived trace mineral complex
• Nitrogen Contribution: Negligible (YAN neutral)
• Solubility: Readily dispersible in hot or sterile water
• Storage: Store in a cool, dry environment

FERM-ZN PLUS delivers one of the most concentrated yeast-bound zinc sources in brewing science. Drives alcohol dehydrogenase activity, accelerates fermentation, and fortifies yeast health for rapid, clean, stable performance.