Tea polyphenol
Tea polyphenol (TP), a kind of polyphenol, mainly contains tea catechin, with concentrations of 8%-20% in the tea leaves. TP is an important chemical with health promoting benefits found in Tea. Now TP has been widely applied in foods, cosmetics and the medicine industry. TP has shown an excellent antioxidative effect on fat and oil-containing foods, better than those of BHA, BHT<VE, etc. Furthermore, TP appears to have a synergetic effect with vitamin E, vitamin C, citric acid, etc. It can also improve the stability of vitamin A, B2 and ß-carotene in foods, as well as inhibit the propagation of bacteria.
TP is also used as a food additive in chewing gum and toothpaste, to deodorize and eliminate halitosis, and anti-caries. It can prevent lipid oxidization in the body. Moreover, TP can stabilize food color. TP pervades health-care products. So far, some new products (such as an oral liquid, capsule) have been sold in the market. TP shows good potential in cosmetics. The absorbing peak of the flavanols of TP appears in wave-length 200-300nm, so that TP is called the filter of ultraviolet rays. TP appears on the labels of anti-inflammation and itch-soothing products. Tea polyphenol supplies active -OH, which helps to eliminate excess free radicals.
Application
| Application | Dosage | Usage |
| Meat products | 0.05% - 0.2% solution | spray TP solution on the surface, or soak meat in TP solution for serveral minutes, then dry it |
| Fried Foods | 0.03% | dissolved in water or white wine, add to foods |
| Lipid products | 0.03% | dissolved in ethanol, |
| Bake Foods | 0.25% - 0.5% | dissolved in water, mixture |
| Drink | 0.02% - 0.1% | add in drink directly |
| Candy | 0.1% - 0.3% | dissolved in water, mixture |
| Fish products | 0.3-0.5g/ml solution | soak in solution or spray TP solution on the surface, then dry it |
| Chewing Gum | 0.01% - 0.5% | * be used as deodorizer |
Tea catechin
They are stronger active materials formed with catechin as the main structure combined with gallic acid group. Those of them exist in green tea are mainly (-)-epigallocatechin gallate (EGCG), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECG), (+)-epicatechin (EC), (-)-gallocatechin gallate (GCG), and (-)-catechin ...
Relative Products
Epigallocatechin Gallate
EGCG is a kind of component extracted from Chinese green tea. It is the primary active and water-soluble component of green tea...Epicatechin
EC is another kind of potent components. It has the similar activity to EGCG,and its antioxidant activity is a little lower than that of EGCG.