Blood catechins

Nowadays, consumers would like those antioxidants present in food products not only to stabilise food lipids, but also to be absorbed through the intestinal wall and protect the lipids of blood plasma against oxidation. This effect is relatively evident in the case of tocopherols (which are liposoluble) or ascorbic acid (which is hydrophilic), but much less evidence is available on antioxidants of medium polarity, such as flavonoids, rosemary oleoresins or green or black tea catechins. 

Yang, C.S., Chen, L., Lee, M.J., Balentine, D.A., Kuo, M.C., and Schantz, S.P., Blood and urine levels of tea catechins after ingestion of different amounts of green tea by human volunteers. Cancer Epidemiol. Biomarkers Prev., 7, 351, 1998. 

Matsumoto, N., Ishigaki, F., Ishigaki, A., Iwashina, H., and Hara, Y., Reduction of blood-glucose levels by tea catechin, Biosci. Biotechnol. Biochem., 57, 525, 1993. 

Rosa acicularis Lindl. China Vitamins, gallocatechin, epigallocatechin, epicatechin gallate, catechin, epicatchin, fatty acids.48 Stop vomitting blood, stomachache, relieve pain caused by nervous system, menstruation. 

N.A. Crataegus laevigata C. monongyna Jacq. C. oxyacantha L. Flavonoid glycosides, procyanidins, catechins, triterpenoid acid, pectins, amygdalin, proanthocyanidins, emulsin, tartaric acid, tannins, crataegus acid, rutin, coumarins, quercitin, amines 99,100,231,278,279 Therapeutic treatment of heart insufficiency, hypotensive, coronary blood supply, arrhythmia. 

N.A. Uncaria gambir (Hunter) Roxb. Rhyncophylline, corynoxeine, hirsutine, isorhyncophylline, nicotinic acid, catechin.297 298 299 313 Lower blood pressure, protect the liver from infection. An astringent. 

Catechu and gambier have catechu-tannic acid and catechin for their essential components. They may be adulterated with mineral matter (earth, ochre, clay, sand), starch, dextrin, extraneous tanning materials and dried blood. 

Li C, Lee MJ, Sheng S, Meng X, Prabhu S, Winnik B, Huang B, Chung JY, Yan S, Ho CT, Yang CS. 2000. Structural identification of two metabolites of catechins and their kinetics in human urine and blood after tea ingestion. Chem Res Toxicol 13 177— 184. 

Diffusion of aglycone Into blood. Small amounts of Isoflavone aglycones and larger amounts of galloylated catechins are found In plasma, suggesting that some aglycone diffuses across the basolateral membrane Into the blood. 

Although most flavonoids in the blood stream are conjugated, flavonoid aglycones, glucuronide, and sulfate conjugates are transported bound to albumin (Janisch, Plumb, and Williamson, unpublished results).In the case of catechins, after 3 days consumption of green tea about 10% are present in blood in the lipoprotein... 

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