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Elemental composition and bioaccessibility of three insufficiently studied Azorean macroalgae |
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| Authors: | Cláudia Afonso Joana Matos Ana M. Campos Romina Gomes Inês Delgado Inês Coelho Isabel Castanheira Narcisa M. Bandarra Carlos Cardoso |
| Affiliation: | 1. Avenida Alfredo Magalhães Ramalho, 6, 1495-165 Algés Lisbon, Portugal;2. Avenida Alfredo Magalhães Ramalho, 6, 1495-165 Algés Lisbon, Portugal Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 16, 1749-016 Lisbon, Portugal Contribution: Data curation (equal), Investigation (equal), Methodology (lead), Software (equal);3. Avenida Alfredo Magalhães Ramalho, 6, 1495-165 Algés Lisbon, Portugal Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 16, 1749-016 Lisbon, Portugal;4. Avenida Alfredo Magalhães Ramalho, 6, 1495-165 Algés Lisbon, Portugal Contribution: Methodology (equal), Validation (supporting);5. Food and Nutrition Department, National Health Institute Doutor Ricardo Jorge (INSA, IP), Av. Padre Cruz, 1649-016 Lisbon, Portugal Contribution: Investigation (supporting), Validation (equal);6. Food and Nutrition Department, National Health Institute Doutor Ricardo Jorge (INSA, IP), Av. Padre Cruz, 1649-016 Lisbon, Portugal Contribution: Formal analysis (lead), Validation (lead);7. Food and Nutrition Department, National Health Institute Doutor Ricardo Jorge (INSA, IP), Av. Padre Cruz, 1649-016 Lisbon, Portugal Contribution: Funding acquisition (lead), Project administration (equal), Supervision (lead);8. Avenida Alfredo Magalhães Ramalho, 6, 1495-165 Algés Lisbon, Portugal CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 289, 4050-123 Porto, Portugal |
| Abstract: | The elemental composition and bioaccessibility of the Azorean macroalgae Petalonia binghamiae, Osmundea pinnatifida and Halopteris scoparia were studied. H. scoparia had the highest Cr, Mn, Co and Ni contents. Iodine content was also the highest in H. scoparia, 1098 ± 54 mg kg dw−1. Content reductions due to rehydration were in the 75%–90% range. Steaming led to similar reductions with exception of Cr, Mn, Co, Ni and Zn in O. pinnatifida. For P. binghamiae and O. pinnatifida, bioaccessibility percentages varied between elements. Variation due to rehydration and culinary treatment was narrower, particularly for P. binghamiae. Whereas I bioaccessibility was low in O. pinnatifida, 11%–14%, it reached 57%–69% in P. binghamiae. On the basis of bioaccessibility, to meet the I DRI, 2.7 g dried P. binghamiae, 16.9–23.8 g rehydrated P. binghamiae and 12.7 g steamed P. binghamiae everyday are required. For O. pinnatifida, 5.0 g, 19.0–33.3 g and 12.9 g of dried, rehydrated and steamed red seaweed, respectively, are needed. |
| Keywords: | Culinary treatment dietary advice essential elements seaweed |
