Summary
Polish university laboratory study examining the effect of industrial buckwheat groats production on magnesium, manganese, zinc, and copper content and in vitro bioaccessibility. Total magnesium content in unprocessed buckwheat grain averaged 1,523.89 ug/g (1,393 to 1,653 ug/g across processing stages). Dehulling increased total magnesium content; hydrothermal treatment effects depended on temperature and duration. Lower-temperature short-duration hydrothermal treatment increased magnesium bioaccessibility.
Key numbers
From Table 2 (p. 5 to 8):
| Processing stage | Magnesium (ug/g dry weight) |
|---|---|
| All grains (average) | 1,523.89 (range 729 to 3,104) |
| Grains with hull | 1,393.1 +/- 27.6 |
| Dehulled grains | 1,653.1 +/- 25.50 |
| Unroasted groats | 1,525.0 +/- 22.2 |
| Roasted groats | 1,375.0 +/- 41.27 |
| Groats (average) | 1,523.1 +/- 28.22 |
| Groats type 2 | 1,450.0 +/- 31.47 |
- Dehulling significantly increased total magnesium content (p < 0.0001; from 1,393 to 1,653 ug/g) (p. 6 to 7)
- Roasting reduced total magnesium content (from 1,525 to 1,375 ug/g; p < 0.0001) (p. 7)
- Hydrothermal treatment at higher temperature reduced bioaccessibility of all analysed elements, particularly noted for zinc and copper; lower temperature increased magnesium bioaccessibility (p. 7 to 8)
- In vitro enzymatic digestion showed magnesium was the highest in absolute post-digestion content across all treatment conditions (p. 8)
- Processing caused a statistically significant increase in bioaccessible magnesium content from 857.6 to 1,034.9 ug/g in one treatment comparison (p. 8)
Evidence Fitness
Reconstructable dataset. n = 3 replicates per treatment group; single-laboratory in vitro bioaccessibility study using enzymatic digestion. Results represent bioaccessibility under standardized in vitro conditions, not actual absorption in humans. Data are relevant to understanding how common food processing affects magnesium availability in a gluten-free staple.
Methods (brief)
Total mineral content by ICP-OES after microwave digestion (HNO3 + H2O2). In vitro bioaccessibility simulated by sequential enzymatic digestion (pepsin + pancreatin). Statistical comparisons by Tukey test (p < 0.05). LOD/LOQ not explicitly stated in the extracted abstract.
Implications
- Courses: illustrates that standard buckwheat processing steps (dehulling, roasting) have opposing effects on total magnesium; relevant for gluten-free diet mineral adequacy discussions.
- App: no contamination_profile implication; magnesium is a nutritional analyte here, not a hazard analyte.
- Microbiome: no direct connection.
Provenance notes
Open access (cc-by). Retrieved from PMC Open Access (pmc-oa-opendata S3). SHA256 verified against MANIFEST.csv.
Related evidence
Update history
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