Alexandra GaletovićJoana AzevedoRaquel Castelo-BrancoFalvio OliveiraBneito Gómez-SilvaVitor Vasconselos2025-05-292025-05-2920202072665110.3390/toxins12060382https://repositorioabierto.uantof.cl/handle/uantof/498Edible Llayta are cyanobacterial colonies consumed in the Andes highlands. Llayta and four isolated cyanobacteria strains were tested for cyanotoxins (microcystin, nodularin, cylindrospermopsin, saxitoxin and -N-methylamino-L-alanine—BMAA) usingmolecular and chemicalmethods. All isolates were free of target genes involved in toxin biosynthesis. Only DNA from Llayta amplified the mcyE gene. Presence of microcystin-LR and BMAA in Llayta extracts was discarded by LC/MS analyses. The analysed Llayta colonies have an incomplete microcystin biosynthetic pathway and are a safe food ingredient.enAttribution 4.0 InternationalArticle