Details

Autor(en) / Beteiligte

• Hu, Qiuhui
• Pan, Genxing
• An, Xinxin
• Ding, Ruixing

Titel

Physiological function of Se-enriched tea fertilised with sodium selenite and naturally high-Se tea in rats

Ist Teil von

• Journal of the science of food and agriculture, 2001-01, Vol.81 (2), p.202-204

Ort / Verlag

Chichester, UK: John Wiley & Sons, Ltd

Erscheinungsjahr

2001

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• In order to increase food selenium (Se) content, Se‐enriched tea was produced by fertilising with sodium selenite in low‐Se soil. Five groups of rats were fed a low‐Se diet supplemented with either water (Se‐deficient), sodium selenite or an aqueous extraction of low‐Se tea, Se‐enriched tea or naturally high‐Se tea. The chemical form of Se in Se‐enriched tea and the physiological function in rats fed the different Se sources were determined after 8 weeks. The results showed that organic Se accounted for 80% or more of the Se in Se‐enriched tea fertilised with sodium selenite and naturally high‐Se tea, but no significant differences in the proportion of organic Se and protein Se were found between Se‐enriched tea and naturally high‐Se tea. The Se biological utilisation rates were 65.41, 68.05 and 70.49% for sodium selenite, Se‐enriched tea and naturally high‐Se tea respectively. The Se content of blood and liver and the glutathione peroxidase (GSH‐Px) activity were significantly increased by feeding Se‐enriched tea and sodium selenite compared with low‐Se tea, but a more efficient increase in liver GSH‐Px activity was obtained with Se‐enriched tea than with sodium selenite. No significant differences were found between Se‐enriched tea fertilised with sodium selenite and naturally high‐Se tea, which proved that the biological effectiveness of Se in Se‐enriched tea was higher than that of sodium selenite in increasing liver GSH‐Px activity. Se‐enriched tea fertilised with sodium selenite in low‐Se soil gave the same biological function as naturally high‐Se tea. Therefore Se‐enriched tea is a safe and effective means of increasing the Se intake of both humans and animals in low‐Se areas. © 2000 Society of Chemical Industry