RT Journal Article T1 Modulatory effects of red seaweeds (Palmaria palmata, Porphyra umbilicalis and Chondrus crispus) on the human gut microbiota via an in vitro model A1 López Santamarina, Aroa A1 Cardelle Cobas, Alejandra A1 Mondragón Portocarrero, Alicia del Carmen A1 Cepeda Sáez, Alberto A1 Miranda López, José Manuel K1 Red seaweed K1 Gut microbiota K1 Short chain fatty acids K1 Metabolic pathways K1 Dietary fiber K1 Polysaccharides AB This work investigated the nutritional and mineral composition of three red seaweed species, Palmaria palmata, Porphyra umbilicalis and Chondrus crispus, and an in vitro assay was performed to determinate the effects of the intake of whole red seaweed on gut microbiota, short chain fatty acids production and metabolic pathways. The results obtained showed that 100 g of seaweeds contained essential minerals such as 28–107 % daily needs of Ca, 183–600 % daily needs of Fe and 18–54 % daily needs of Zn, whereas low content were found for Cu and I. Seaweed digestion fermentation showed beneficial effects of gut microbiota, as increases in beneficial species such as Akkermansia muciniphila, and in some seaweed, Bifidobacterium adoslescentis, Bacteroides ovatus or Lactobacillus ruminis. Metabolic pathways did only found little significant differences with respect to inulin fermentation. In view of the results, red seaweed showed prebiotic effects on human gut microbiota. PB Elsevier SN 0308-8146 YR 2025 FD 2025-06-01 LK https://hdl.handle.net/10347/43301 UL https://hdl.handle.net/10347/43301 LA eng NO Food Chemistry Volume 476, 1 June 2025, 143437 NO Aroa Lopez-Santamarina is grateful for a predoctoral grant funded by the Universidade de Santiago de Compostela (USC), Campus Terra, Lugo, (Contratos predoutorais do campus de especializacion Campus Terra). DS Minerva RD 28 abr 2026