WHC Lab Thiol Unleashed hybrid dry yeast 500 g

Thiol Unleashed 500 g is a hybrid dry yeast designed for breweries seeking maximum aromatic impact in modern styles. Selected for its ability to release volatile thiols during fermentation, it enhances notes of tropical fruit, citrus, passion fruit and blackcurrant thanks to its targeted β‑lyase activity.

Thiols such as 3MA (grapefruit), 3MHA (passion fruit) and 4MMP (blackcurrant) occur naturally in hops, malt or certain fruits, but often in bound, non‑aromatic forms. Thiol Unleashed enables their enzymatic release, drastically increasing aromatic complexity without additional hop input.

The strain is a hybridised Saccharomyces cerevisiae, optimised to combine the fermentation performance of a brewing yeast with the thiol‑releasing capacity of non‑brewing species — but without associated drawbacks (phenols, low attenuation).

Why choose this product?

• Powerful thiol release for highly aromatic modern beers.
• Hybrid strain without undesirable phenol production.
• Reliable attenuation (74–80%) for controlled fermentation.

Technical characteristics

• Type: professional dry yeast
• Strain: hybridised Saccharomyces cerevisiae
• Dosage: 0.5–1 g/L
• Fermentation temperature: 18–22 °C
• Alcohol tolerance: 13% ABV
• Attenuation: 74–80%
• Nitrogen requirement: medium
• Aromatic profile: tropical thiols, citrus, passion fruit, blackcurrant
• Released molecules: 3MA, 3MHA, 4MMP
• Weight: 500 g
• No other accessories or additives included.

Technical Tips

• Maximise thiol release by using hops rich in precursors (e.g. high‑3MHA varieties).
• Maintain appropriate nitrogen nutrition: the strain has medium demand.
• For maximum aromatic expression, ferment in the upper range (20–22 °C).

Product FAQ

• Does the yeast produce phenols?
  No, the hybrid strain is selected to avoid undesirable phenols.
• Which beer styles are most suitable?
  NEIPA, modern IPA, aromatic Pale Ale, fruit‑forward beers.
• Can it be used with fruit additions?
  Yes, it also releases bound thiols present in fruits.
• Does the yeast require additional nutrients?
  Medium nitrogen supplementation is recommended.