Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Soares, Cristina; Sousa, Sara; Machado, Susana; Vieira, Emília; Carvalho, Ana P.; Ramalhosa, Maria João; Morais, Simone; Correia, Manuela; Oliva-Teles, Maria Teresa; Delerue–Matos, Cristina

doi:10.3390/foods10061366

Cited by 16 publications

(7 citation statements)

References 40 publications

(57 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, environmental conditions have an impact on the production of different FA, with PUFA being produced mainly during summer and SFA during winter. This seasonal variation has been registered before for red seaweeds [55,69,82], but with an increase in PUFA during summer. The mild temperatures recorded in Portugal, in the central area, may have less impact on PUFA production, and other environmental conditions such as nutrient availability, light intensity during summer, salinity, and the physiological state of the thalli, or the life cycle of the species itself, may influence the production of these primary metabolites [46,83].…”

Section: Discussionsupporting

confidence: 68%

“…The ratio n-6/n-3 balances the precursors of anti-inflammatory (n-3) and pro-inflammatory (n-6) metabolic eicosanoids [55].…”

Section: Indexes Of Lipid Qualitymentioning

confidence: 99%

“…Finally, the hypo-and hypercholesterolemic ratio (h/H ratio) was developed as an accurate measure of the effect of fatty acid composition on cholesterol [55] and was calculated according to the following equation:…”

Section: Indexes Of Lipid Qualitymentioning

confidence: 99%

See 2 more Smart Citations

Seasonal Nutritional Profile of Gelidium corneum (Rhodophyta, Gelidiaceae) from the Center of Portugal

Cavaco

Duarte

Freitas

et al. 2021

Foods

View full text Add to dashboard Cite

Gelidium corneum is a well-known agarophyte, harvested worldwide for its high agar quality. However, the species also exhibits an interesting nutritional profile, but with seasonal variations. Therefore, to evaluate the nutritional value of G. corneum, ash, crude protein, total lipids, and carbohydrates were analyzed at different times of the year. The heavy metals mercury, arsenic, lead, cadmium, and tin, as well as iodine were also measured. Finally, the seasonal antioxidant capacity of G. corneum extracts was evaluated. Our results indicate that the biomass is rich in protein (up to 16.25 ± 0.33%) and carbohydrates (up to 39.5 ± 3.29%), and low in lipids (up to 2.75 ± 0.28%), and especially in the summer, the AI, TI indexes, n-6/n-3 and h/H ratios (0.93, 0.6, 0.88 and 1.08, respectively) are very interesting. None of the contaminants exceeded the legally established limits, and the iodine values were adequate for a healthy diet. Finally, the antioxidant capacity is fair, with the DPPH £ 10.89 ± 1.46%, and ABTS £ 13.90 ± 1.54% inhibition, FRAP £ 0.91 ± 0.22 AAE.g−1, and TPC £ 6.82 ± 0.26 GAE.g−1. The results show that G. corneum is an attractive resource, with potential use as food or as a food supplement.

show abstract

Section: Discussionsupporting

confidence: 68%

“…The ratio n-6/n-3 balances the precursors of anti-inflammatory (n-3) and pro-inflammatory (n-6) metabolic eicosanoids [55].…”

Section: Indexes Of Lipid Qualitymentioning

confidence: 99%

See 1 more Smart Citation

Seasonal Nutritional Profile of Gelidium corneum (Rhodophyta, Gelidiaceae) from the Center of Portugal

Cavaco

Duarte

Freitas

et al. 2021

Foods

View full text Add to dashboard Cite

show abstract

“…Similar results were reported for C. crispus (0.7-2% D.W.) and Porphyra spp. (1.3-2.3% D.W.) by Soares et al [35]. Other researchers such as Maehre et al [26] reported 2.6% D.W. for Ulva lactuca, a value that is in agreement with those found in the present study.…”

Section: Total Lipidssupporting

confidence: 93%

Proximate Composition, Physicochemical and Microbiological Characterization of Edible Seaweeds Available in the Portuguese Market

Campos¹,

Ramalho²,

Marmelo³

et al. 2022

Front. Biosci. (Elite Ed)

View full text Add to dashboard Cite

Background:The aim of this work was the study of the proximate composition and profile of fatty acids, minerals, and some microbiological aspects of four edible seaweed species (Chondrus crispus, Palmaria palmata, Porphyra sp., and Ulva sp.) available in the Portuguese market for food consumption, and produced in a national Integrated Multi-Trophic System (IMTA). Methods: Moisture, ash, and total lipids were determined gravimetrically. Crude protein was analysed by Duma's combustion procedures. The total carbohydrate content was assayed by the phenol/sulphuric acid method. The assessment of the fatty acids methyl esters (FAMEs) was determined through GC-MS. Characterization of elemental analysis was performed by ICP-AES. Different standard microbiological methods were applied for microorganisms. Statistics were performed using the non-parametric Mann-Whitney U test to assess significant differences between samples. Results: Lipid contents (n = 3) were very low (1.6-2.3%), particularly in Palmaria palmata, and Chondrus crispus (1.6-1.7%). The protein content (n = 4) varied from 14.4% in P. palmata to 23.7% in Porphyra sp. Carbohydrates (n = 3) were the major constituent of most seaweeds (31-34%), except in Porphyra sp., with higher content in proteins than carbohydrates. Regarding the fatty acid content (n = 4), in general, saturated fatty acids (SFAs) were the most abundant followed by polyunsaturated fatty acids (PUFAs) and monounsaturated fatty acids (MUFAs). Among macro and trace elements (n = 3), Chondrus crispus shows the highest average content in Zn (71.1 mg•kg −1 D.W.), Palmaria palmata the highest average content in K (124.8 g•kg −1 D.W.), Porphyra sp. the highest average content in P (2.1 g•kg −1 D.W.), and Ulva sp. the highest average content of Ca (5.5 g•kg −1 D.W.), Mg (55.8 g•kg −1 D.W.), and Fe (336.3 mg•kg −1 D.W.). In general, Na and K were the most abundant elements among analysed seaweed. Additionally, the microbiological results (n = 4) comply with the Portuguese guidelines (subgroup 2D) on the application of general principles of food hygiene in ready-to-eat foods. Conclusions: Overall, the results highlight the potential of using these seaweeds as an alternative and sustainable source of elements and bioactive compounds to produce enriched food products with a beneficial potential for human nutrition.Keywords: Edible seaweed species; proximal composition; chemical analysis; microbial load palmata) Nori (Porphyra sp.) and Sea lettuce (Ulva sp.)). Fatty acids (FAMEs) Group Abbrev. Seaweeds Chondrus crispus Palmaria palmata Porphyra sp. Ulva sp. C14:0 SFA MA 6.6 ± 0.01 18.3 ± 1.35 0.5 ± 0.08 0.9 ± 0.02 C16:0 SFA PA 43.9 ± 0.19 62.1 ± 0.22 41.9 ± 4.46 43.8 ± 0.85 C16:1 MUFA PLA 1.1 ± 0.00 0.7 ± 0.07 1.6 ± 0.24 3.9 ± 0.03 C18:0 SFA SA 1.2 ± 0.03 5.8 ± 0.28 0.8 ± 0.11 0.9 ± 0.10 C18:1 MUFA OL 1.0 ± 0.05 5.7 ± 0.40 1.4 ± 0.16 14.8 ± 0.22 C18:1 MUFA EA 9.9 ± 0.03 1.6 ± 0.18 4.3 ± 0.53 11.9 ± 0.25 C18:2 PUFA LA 1.3 ± 0.03 0.8 ± 0.01 2.8 ± 0.38 3.2 ± 0.06 C18:3 PUFA GLA n.d. n.d. 0.4 ± 0.07 0.4 ± 0.18...

show abstract

“…Eicosapentaenoic and docosahexaenoic acids are mainly found in fish oil, which composition is mainly related to the fish diet consisting of marine algae and phytoplankton [ 60 ]. Fatty acids content in seaweeds is dependent on the harvest season, habitat and genetics [ 61 ]. Brown and red seaweeds usually contain higher amounts of PUFAs when compared with green macroalgae.…”

Section: Macroalgae As a Source Of Biologically Active Compoundsmentioning

confidence: 99%

Marine Health-Promoting Compounds: Recent Trends for Their Characterization and Human Applications

Quitério

Soares

Ferraz

et al. 2021

Foods

Self Cite

View full text Add to dashboard Cite

Seaweeds represent a rich source of biologically active compounds with several applications, especially in the food, cosmetics, and medical fields. The beneficial effects of marine compounds on health have been increasingly explored, making them an excellent choice for the design of functional foods. When studying marine compounds, several aspects must be considered: extraction, identification and quantification methods, purification steps, and processes to increase their stability. Advanced green techniques have been used to extract these valuable compounds, and chromatographic methods have been developed to identify and quantify them. However, apart from the beneficial effects of seaweeds for human health, these natural sources of bioactive compounds can also accumulate undesirable toxic elements with potential health risks. Applying purification techniques of extracts from seaweeds may mitigate the amount of excessive toxic components, ensuring healthy and safer products for commercialization. Furthermore, limitations such as stability and bioavailability problems, chemical degradation reactions during storage, and sensitivity to oxidation and photo-oxidation, need to be overcome using, for example, nanoencapsulation techniques. Here we summarize recent advances in all steps of marine products identification and purification and highlight selected human applications, including food and feed applications, cosmetic, human health, and fertilizers, among others.

show abstract

Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Cited by 16 publications

References 40 publications

Seasonal Nutritional Profile of Gelidium corneum (Rhodophyta, Gelidiaceae) from the Center of Portugal

Seasonal Nutritional Profile of Gelidium corneum (Rhodophyta, Gelidiaceae) from the Center of Portugal

Proximate Composition, Physicochemical and Microbiological Characterization of Edible Seaweeds Available in the Portuguese Market

Marine Health-Promoting Compounds: Recent Trends for Their Characterization and Human Applications

Contact Info

Product

Resources

About