Effect of Tea Consumption Health

Effect of tea on the health benefits have been demonstrated in studies using experimental animals and some human studies. Two of the most intensively investigated is the heart disease and cancer.
Although the mechanism Protective activity of tea against the disease has been proposed, there are inconsistencies in the relationship between tea consumption and risk of disease in humans.
Epidemiologik study was investigate the effects of tea consumption kardiovaskuler disease. On a long-term study in the Netherlands, tea consumption associated with a lower risk of death due to coronary heart disease and stroke incidence is low.
In the study in Rotterdam, a best tea consumption with illness aterosklerosis aortik has observation. Health study in Boston found that subjects who drank a cup (200-250 ml of) or more of black tea per day had approximately half the risk of a heart attack compared with people who do not drink tea.
One mechanism proposed for Protective effects of tea may be a disease of the kardiovaskuler was that tea polifenol prionevent oksidari LDL, known to be involved in the development of aterosklerosis.
Studies have indicated that consumption of black tea has an LDL against oxidation ex vivo. Polifenol tea accumulat in LDL particles after 3 weeks consumption of green tea or black, but their level is not enough to strengthen the resistance of LDL oxidation.
Summary of hipokolesterolemik tea can also contribute to protection against heart disease. In the animals that are feeding high-fat and cholesterol, green tea, black tea, and tea have been polifenol prevent lipida increased serum and liver, have lower total serum cholesterol or aterogenik index, and have increased ekskresi fekal from lipida and total cholesterol.
When the animal is given a high fat feed, the animal is given a green tea or green tea plifenol have serum total cholesterol and low-level triasilgliserol the ekskresi fat fekal but higher than the control group.
However, the study epidemiologik and testing in humans has failed to show an effect of lowering serum cholesterol consumption of green tea or black. Epidemiologik study of 13, only four reported the inverse relationship. One other potential mechanism may be through the effect on weight and body fat.
Latest observation that administration of black tea has intragastrik hamper platelet aggregation to prevent thrombosis and has been on the experimental koronari dog and that polifenol green tea consumption has been decreasing platelet aggregation of ADP induction gives you a mechanism for the possible prevention of disease kardiovaskuler. However, green tea extract equivalent to 10 cups (2 liter) for 4 sunday tea does not have a significant effect on several indicators related to disease kardiovaskuler.
Black and green tea has caused a large increase in acute (30 minutes after ingesti) on blood pressure than caffeine alone. However, regular tea consumption does not change blood pressure.
Tea and cancer
Tea has been considered as a beverage as cancer preventive activity such as has been demonstrated in many animal models.
Models include skin cancer, tuberculosis, esofagus, stomach, liver, small intestine, pancreas, kolon, urine bag, prostat, gland and milk. The solution is usually given to the animals as the sole source of liquid water.
Extensive study on the tumorigenesis of diinduksi UV light and chemicals, as the tumor tuberculosis induction chemicals and going on spontaneous mencit have indicated that tea has a wide inhibitori activity against tumorigenesis and effective when administration during the insiasi, promotion or progresi karsinogenesis. This conclusion may also be applied to other models.
The results have been reported about the opposite effect on the tea karsinogenesis kolon; retardation and less obstacles they have been reported. Retardation of the milk gland tumorigenesis that terinduksi the chemical by observation the tea has been feeding the mice fed high. EGCG has been shown prevent the growth of cells and breast cancer human prostat.
Many mechanisms have been proposed about the action against inhibitori tea karsinogenesis. Mechanism is the most common activity antioksidatif, but many other mechanisms are also important. Antiproliferatif effects of tea catechin has been demonstrated on the model and the tuberculosis skin tumorigenesis in mencit. Obstacles tranformasi cells and cell growth by catechin and theaflavin pure also has been reported.
Activity that has been linked to barriers activities activator protein 1 (AP-1). Because AP-1 activation that is often in many human cancers, this action may be applied to human cancer prevention. Retardation enzyme associated with tumor promotion, such as ornithine decarboxylase, protein kinase C, lipoksigenase and sikloosigenase by tea has been shown. Relationships between the decrease in body fat by tea and skin tumorigenesis barrier has diobservasi.
Mencit who drank black tea or green tea has a tumor tuberculosis fewer and less weight than controls, although they mengonsumsi the same amount of food or more. Based on the varied activities inhibitori who have diobservasi in animal models of different culture and different cancer cells, it may be that the uterus and the mechanisms involved in the multiple barriers karsinogenesis.
Effect on the nutrition
On mencit obesity, consumption of oolong tea for 10 sunday was perlemakan and prevent obesity. Absorpsi nutrien decreases and the burning of energy may be increased in both berkonstribusi effect.
Green tea extract stimulated thermogenesis has adiposa network in the rat to a level that is greater than can be conducted by caffeine alone. Ingesti green tea extract by young men with healthy food each produce a significant increase in the burning of energy 24 hours.
This study has indicated that polifenol tea hamper activity catechol O-methyltransferase and synergistic with caffeine reacts to extend simpatetik stimulation of thermogenesis.
Whether the consumption of tea absorpsi protein in humans still needs further investigated. Afinitas because of the strong ties of tea polifenol of ion-metal ion, an effect that may be in the tea absorpsi nutrien it is that important.
The decline in iron absorpsi because tea has been reported. Effect seems to be mainly in the nonheme iron, and iron and when the tea is consumed at the same time. Heme iron Absorpsi from the cooked meat is not affected by tea consumption.
Among women aged 65-76 years, tea consumption associated with the measurement of bone mineral density is greater, which is consistent with reports that the tea is Protective against fraktura bone pinggul. The data indicates that the components of polifenol addition, fitoestrogen as or fluorida, may affect bone mineral density. Tea found glukosiltransferase prevent activity streptokokki of oral and dental caries on the development of the mouse. Tea contains the fluorida may strengthen tooth enamel and improve dental health.
In the model mencit arthritik the induction collagen, polifenol green tea in a significant incidence mereduksi illness and arthritis. Inflamatori expression of mediators that include siklooksigenase-2, Interferon gamma, and TNF-alpha on the lower joints arthritik from mencit are polifenol green tea. Cataracts, which develop presipitasi as a result of the protein in the lens, may direduksi by consumption of tea increased

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