Analiza zawartości pochodnych L-tryptofanu w wybranych algach i w produktach zawierających algi

*Bożena Muszyńska¹, Barbara Jękot², Tamara Mastalerz¹, Katarzyna Sułkowska-Ziaja¹

Summary
The objective of the study was the qualitative and quantitative HPLC analyse of the selected non-hallucinogenic indole compounds in methanol extracts from selected algae and generally available food products that contain algae. The analysis presented that all tested materials contained indole compounds. The highest total content of the indole compounds was found in the extracts from Spirulina tablets and that was 4.49 mg/100 g d.w. In contrast, the smallest amount of indole compounds contained the extract from commercial algae product Roasted seaweed snack, and it was 0.08 mg/100 g d.w. The largest diversity of indole compounds was found in the extract from Spirulina Energy Bar. In this extract was determined 5 indole compounds: serotonin, melatonin, L-tryptophan, 5-hydroxy-L-tryptophan and 5-methyltryptamine. Serotonin was detected in each of the extracts. The highest content of L-tryptophan and serotonin were determined in the extract obtained from Spirulina tablets and they were respectively 0.4 mg/100 g d.w. and 3.89 mg/100 g d.w. The extract from Fucus vesiculosus contained significant amount of 5-hydroxy-L-tryptophan and it was 0.69 mg/100 g d.w. This fact deserves attention, because this amino acid is a precursor of biologically active compounds such as melatonin and serotonin. The least frequently occurring indole compound in the extracts was 5-methyltryptamine. Its significant amount was detected only in commercial algae product Spirulina Energy Bar.

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