Abstract
The influence of under-fermented (UF) cocoa (0 to 65 %) on bioactive amines in chocolate and their in vitro bioaccessibility was investigated. The same amines were found in all treatments; however, treatments were divided into two groups regarding total amines [0 & 20 % UF (34 mg/kg) and 35 to 65 % UF (17 mg/kg)] and phenolic levels [lower and higher, respectively]. Serotonin, tyramine, putrescine, cadaverine, agmatine and phenylethylamine were higher in chocolate with ≤ 20 % UF cocoa. Histamine and spermidine were not affected. Digestibility studies indicated that low levels of amines were present in the oral phase. Gastric digestion was effective in releasing tyramine, spermidine and phenylethylamine from conjugates. Serotonin and agmatine were not detected after in vitro digestion of chocolate with ≥ 35 % UF cocoa. Histamine was released during in vitro intestinal digestion. By adding different proportions of UF cocoa during chocolate production, the levels and bioaccessibility of amines can be modulated.
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