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Content and Bioaccessibility of Minerals and Proteins in Fish-Bone Containing Side-Streams from Seafood Industries

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Summary

DTU Food (Denmark) and AZTI (Spain) study measuring mineral content and in vitro bioaccessibility (INFOGEST 2.0 protocol) of magnesium, phosphorus, potassium, and calcium in bone-containing side-streams from enzymatic hydrolysis of three fish species (undersized whole hake, cod backbones, and salmon backbones). The bone powders were compared to a commercial calcium supplement to evaluate their potential as dietary supplement ingredients.

Key numbers

From Table 1 (p. 2 to 3):

  • Mineral content reported in mg/100 g (wet weight) for Mg, P, K, Ca, and protein across HakeE, CodC, SalmonE bone powder products and a calcium supplement comparator
  • Phosphorus and calcium were the dominant minerals; magnesium was present in lower concentrations but above potassium in several fractions
  • Exact per-product Mg values and bioaccessibility percentages are reported in Table 1 and Table 2 of the paper (p. 2 to 4)
  • Both <LOQ symbols are defined in footnotes (p. 4)

Evidence Fitness

Reconstructable dataset. n = 3 fish species/processing combinations; single laboratory in vitro bioaccessibility using standardized INFOGEST 2.0 protocol. Results are relevant to understanding magnesium content in fish side-streams being developed as mineral supplement ingredients. The bioaccessibility values represent standardized in vitro conditions, not human absorption data.

Methods (brief)

Enzymatic hydrolysis under different enzyme conditions per species. Mineral content by ICP-OES after microwave acid digestion. In vitro bioaccessibility by INFOGEST 2.0 standardized static model. Protein content by Kjeldahl. Statistical analysis: values flagged as <LOQ denoted in footnotes (p. 4).

Implications

  • Courses: illustrates that fish side-streams from enzymatic hydrolysis are a potentially magnesium-containing ingredient for dietary supplements; the bioaccessibility data help contextualize how much of the mineral would be available during digestion.
  • App: no contamination_profile implication; magnesium is a nutritional analyte here, not a hazard analyte.
  • Microbiome: no direct connection.

Provenance notes

Open access (PMC OA subset). Retrieved from PMC Open Access (pmc-oa-opendata S3). SHA256 verified against MANIFEST.csv.

Update history

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