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Why does beer carry a fruity, floral edge?

Beer is fermented grain — starchy, bitter, yeasty. Yet the finished glass often registers as something closer to a fruit bowl or a flower market. Yeast metabolism is largely responsible.

Isoamyl acetate
The banana-pear ester produced in bulk during yeast fermentation
OAV in beer
Aroma: banana, pear, fruity · ester
2-phenylethanol
A rose-and-honey alcohol that yeast synthesizes from phenylalanine
OAV in beer
Aroma: honey, floral, rose · alcohol
Linalool
The lavender-citrus terpenoid carried over from hops
OAV in beer
Aroma: flower, lavender, citrus · terpenoid

Three compounds — one from ester synthesis, one from amino acid catabolism, one from the hop cone itself — converge in the finished glass to push beer's aroma well outside the grain-and-water story its ingredients suggest.

Unlock the OAV numbers

See exactly how far over the detection threshold each compound is — the part of the chemistry that explains why this pairing works. Plus the full ranked list for any ingredient, compound index, and Compare tool.

OAV (Odor Activity Value) = concentration ÷ detection threshold. Numbers above 1 mean the compound contributes detectably to aroma.