What makes Hophead yeast different
Unlike many ale yeasts, M66 is actually a yeast–enzyme blend. The added enzymes help release more aromatic compounds from hops and fruit additions during fermentation.
That means it doesn’t just ferment sugars — it actively enhances hop aroma and flavour, which is why it’s popular for New England-style IPAs.
Typical effect in the beer:
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Amplifies tropical, citrus, and fruity hop aromas
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Works especially well with late hop additions and dry hopping
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Produces a balanced ester profile that complements “New World” hop varieties.
Technical characteristics
Typical specs for M66:
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Yeast type: Saccharomyces cerevisiae ale yeast
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Attenuation: ~74–82 % (medium)
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Flocculation: High (4/5)
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Alcohol tolerance: ~10 % ABV
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Fermentation temperature: 18–22 °C
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Dose: 1 × 10 g sachet for about 23 L of wort
The high flocculation means it settles reasonably well after fermentation, though hazy IPA brewers usually keep some haze.
Beer styles it suits
M66 is designed for hop-driven beers, particularly:
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New England IPA (NEIPA)
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Juicy IPA
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Hazy IPA
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American IPA
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American Pale Ale
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XPA or other modern pale ales
It leaves a moderately dry finish but still retains body, which helps support big hop aroma without the beer tasting thin.
Practical brewing notes
Brewers often use it when they want:
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Maximum hop aroma from dry hopping
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A juicy, fruit-forward character
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A yeast that doesn’t completely dominate the hops
It’s somewhat comparable in concept to London Ale III / NEIPA-style yeasts, but with the extra enzyme boost for hop aroma extraction.
In simple terms:
Mangrove Jack’s Hophead (M66) is a specialty ale yeast designed to make IPAs smell and taste more intensely “hoppy” and fruity, especially in hazy or juicy IPA styles.
