[Taste/Aroma] Lactic acid [Adulterant] Lactic acid [Amount Added] 18 drops food grade 88% lactic acid in 24 oz of base beer [How Created] Created during or after fermentation by lactobacillus. In non-sour beers, likely a problem with sanitation. [Flavor] 
Sour/Acidic
S o u r / A c i d i c
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P h e n o l i c
D i a c e t y l
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A l c o h o l i c