Production of biogenic amines under laboratory conditions does not imply similar behaviour in
fermented products. Wines are complex systems with a wide number of factors influencing microbial
growth and metabolism. Grape phenolics are the main compounds responsible for color, taste, oxidation
and other chemical reactions in wine and juice. They have received considerable attention because of
their potential antioxidant activity. The specific amounts and types of phenolics present in grapes and
wines depend on a number of factors, including variety and maturity of the grape, seasonal conditions,
storage and the vinification process (phenol carboxylic acids, 100–200 mg/l, catechin, 10–400 mg/l,
quercetin, 5–20 mg/l).