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Essay on tea for health
The benefit of drinking tea
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Introduction
An antioxidant is any substance that significantly delays or inhibits the oxidation of a substrate (Young & Woodside, 2001). The physiological role of antioxidants is to prevent cellular damage arising as a consequence of chemical reactions involving free radicals. Free radicals are major contributors to degenerative diseases of aging, such as cancer, cardiovascular disease, cataracts, immune system decline, and brain dysfunction (Ames, et al., 1990) (Atoui, et al., 2005). Antioxidants have the ability to stabilize or deactivate free radicals before they attack the body and hence antioxidants are critical for maintaining optimal well-being.
Green tea, Black tea and Rooibos tea are all sources of antioxidants (von Gadow, et al., 1997) and they have been advertised as such by companies including Lipton and Nestea. Tea remains the most consumed drink in the world after water (Rietveld & Wiseman, 2003). South African tea consumption per capita is 11th globally as on average each person will drink two pounds of tea per year (Ferdman, 2014).
However, a number of studies have suggested that the addition of milk and sugar to tea may decrease
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They found that a substantial number of human intervention studies with green and black tea had all demonstrated a significant increase in plasma antioxidant capacity in humans after consumption of moderate amounts of tea (1–6 cups/tea). Overall, they concluded that tea flavonoids are potent antioxidants that are absorbed from the gut after consumption and significantly increase the antioxidant capacity of the blood. Beneficial effects of increased antioxidant capacity in the body may be the reduction of oxidative damage to important molecules. The scientific support is strongest for the protection of DNA from oxidative damage after black or green tea
The idea that coffee stunts growth is a myth; hereditary determines a person 's height, and coffee provided benefits for an individual 's health. Although adding coffee addictions such as sugar and creamer detracts from coffees commendable health effects would not be beneficial. This brown, liquid, hot fresh beverage has proven through various studies and experiments, why individuals must drink coffee everyday. As stated before, over half of all Americans drink coffee everyday, with the population’s height growing every year. Perhaps, as years progress the height will keep getting towering, making the myth
In a healthy and young body, both antioxidants and the cell’s own repair capabilities work together to keep the cell intact. However, if the cell has become way too damaged for quite some time and cannot manage all the lesions created by free radicals, it can lose its ability to deal with the damages. This can also be referred to as the oxidative stress that the cells incur. Thus, they die quickly or begin replicating their damaged forms, and create a domino effect of the body gradually not being able to continue maintaining proper functioning
Oxidative stress is essentially defined as the imbalance in the equilibrium of antioxidants systems in the human body. Oxidative damage in aerobic organisms can be caused by certain molecules known as reactive oxygen species (ROS). These reactive species are ones that cause oxidative damage in biomolecules. In order to maintain equilibrium of these substances, the human body has various endogenous antioxidants and phase 2 proteins which have evolved to defend against any harmful effects of ROS or any other reactive species. In normal physiological conditions, a balance is maintained between the ROS production and their detoxification by the appropriate antioxidants and phases 2 proteins. (Uttara, Singh, Zamboni & Mahajan, 2009). Oxidative stress can occur due too many pathological conditions, when the balance of prooxidants and antioxidants is disturbed oxidative damage could accumulate in proteins, lipids, carbohydrates and nucleic acids. In severe cases these events can lead to cell death. The process can directly alter the antioxidant systems by either inducing or inhibiting the proteins which take part in these systems. Moreover it can also cause the depletion of storage of antioxidants such as glutathione, vitamin E and many more in cells. (Thomas 2006). Antioxidants are defined as any substance which has the ability to inhibit, reduce or repair the damage as a result of an ROS in a biomolecule. The general three mechanisms that are used by antioxidants include the inhibition of ROS generation, the repair of damage induced by ROS and scavenging for ROS molecules. Since ROS plays a precarious role in both physiology and pathophysiology in the human body, it is vital that the endogenous antioxidants and phase prote...
...ve a higher bone density than people who don’t drink tea. The researcher asserts tea includes fluorine, phytoestrogen, and manganese that are contributing to making higher bone density. (navercast 2)
Vitamin C in the body acts as an antioxidant. Vitamin C loses electrons easily, a characteristic that allows it to perform as an antioxidant. In the body, antioxidants defend against free radicals. A free radical is a molecule with one or more unpaired electrons, which makes it unstable and highly reactive. By donating an electron or two, antioxidants neutralize free radicals and protect other substances from their damage. Figure 1 illustrates how vitamin C can give up electrons to stop free radical damage and then accept them again to become reactivated. This recycling of vitamin C is key to limiting losses and maintaining a reserve of
Oxygen is an essential component for cellular metabolic processes. As a result of normal cellular metabolism, oxidative products i.e. oxygen free radicals or reactive oxygen species are produced. In eukaryotic cells energy is generated in mitochondria as a result of aerobic respiration and this oxidative metabolism is responsible for formation of various compounds. Nearly all of these compounds are advantageous but a small proportion could be lethal if produced in higher concentration. During normal conditions small quantities of oxidative products are necessary for certain sub cellular events, including enzyme activation, formation of disulfide bond during the folding of new proteins, signal transduction and gene expression etc. (Yu etal., 2002; Droge, 2002). Oxidative stress can be defined as the excessive production of ROS which are not adequately removed from the body, because of reduced antioxidant defense system or the ROS increases beyond the capacity of antioxidants. The balance between oxidants and antioxidants is vital because oxidative stress can cause oxidative damages to N.A, lipids and proteins. The most important ROS are superoxide anion (O2−), singlet oxygen (O2), hydrogen peroxide (H2O2) and highly reactive hydroxyl radical (OH-). Whereas, antioxidant defense system is responsible to give protection against ROS. These antioxidants can scavenge and destroy ROS. The major antioxidant enzymes are catalase (CAT), superoxide dismutase (SOD) PON ….. and glutathione system (Sies, 1985; Valko et al., 2007; Halliwell and Gutteridge, 1990).
According to the Western Dairy Association, the fifteenth leading milk producer in the U.S. On the other hand, sports drinks and colas have almost three times the amount of added sugar. Cola has nine teaspoons of added sugar and sports drinks have about seven teaspoons of added sugar, according to Melissa Dobbins a Nutrients. This shows that colas and sports drinks are the problem when talking about obesity not the healthy nutrition drink chocolate milk, Kids are not obese because they drink chocolate milk because it has zero grams of fat and very little added sugar. This proves that kids are not obese because they drink chocolate milk, but, because they drink beverages with mountains of fattening ingredients.
Wine chemist Andrew L. Waterhouse told the SCIENCE News that even though many studies support the theory that antioxidants prevent heart diseases. It is still a mystery what in the blood or the low-density lipoproteins, which shuttle fat around in the blood, is slowing the oxidation. “In other words it may not be a direct effects of phenolics, but instead some indirect change that they trigger – such as altered fat or protein metabolism.”(Science News, Raloff) Recent studies have only suggested that it was the polyphenols that were causing the antioxidation but were never able to establish any kind of proof that it was the polyphenols that were causing the antioxidation, but they do initiate antioxidation that has often been proofed.
Antioxidants are substances that stable enough to prevent or retard the oxidation of easily oxidisable biomolecules such as lipids, proteins and DNA, thus preventing oxidative damage (Lobo et al. 2010). Antioxidants can be classified into two classes, according to their action, into primary or chain breaking antioxidants and secondary or preventative antioxidants. Primary antioxidants, when present in low concentration, can either delay or inhibit the lipid oxidation by reacting with a lipid radical or peroxyl radicals. Secondary antioxidants on the other hand, retard the rate of oxidation by chelating of metal ions or quenching of singlet oxygen (Amalia et al. 2005). These antioxidants are widely used as food additives in foods, especially those with high lipid content, to protect against oxidative degradation, maintain nutritional quality and increase the shelf life of the food.
The best loose leaf tea offers various potential wellbeing profits. The primary importance of drinking loose leaf teas is that they are of higher quality. The clarification for this is basic. On buying loose leaf, whether it is loose leaf green tea or natural loose leaf tea, you get entire leaves, which hold their vital oils. In any case, what happens in the other hand is that the leaves utilized within sacks are frequently tea clean and leaf parts. The tea dust is gathered after the leaves are picked and transformed. These sections when put into sacks, lose their fundamental oils, which commonly exist in entire clears out. On the off chance that the tea in the sacks, if at all holds a percentage of the oils, then they are of low quality.
While tea is said to be healthier, it is the second most consumed morning beverage. Why is that? On an average day, only one in five American adults drink tea. The average tea drinker takes in more than twenty times more flavonoid antioxidants per day than non-tea drinkers. So those non-tea drinkers are missing out on their daily helping of flavonoid. Caffeine in tea isn't as much of an issue as it is in coffee.
While tea is often considered to be coffee’s gentler cousin, but when teeth are involved this may not be the case. Some black teas may actually stain teeth more than coffee. Similar to red wine, black teas tend to have a very high tannin content, which contributes to teeth staining. Therefore, teas with a lesser tannin content, such as green, white, and herbal tea, are much less likely to stain teeth. Herbal tea, on the other hand, still was found to erode
The purpose of testing and finding the amount of caffeine in tea is to help people better their choice of tea. Caffeine causes high risk in blood pressure so testing the amount of caffeine in tea can help reduce the amount of caffeine that is being intaked. When drinking caffeine become a daily beverage the human body begins to rely on caffeine to stay away and working so testing the caffeine can help tea drinkers choose the right tea, which is the one with the lowest caffeine. Many people enjoy tea but testing this experiment will help realize what substances are contained in tea. More than 80% percent of society drinks beverages with caffeine, but this experiment will help America make a better choice in what they drink and enjoy beverages that doesn’t have as much caffeine (Demand Media,2010).
Coffee people drink coffee with a purpose, they need the caffeine to make them more alert and increase their productivity. On the other hand, tea drinkers usually drink tea because of the enjoyment that tea give them, the relaxations that tea provide. It is typical to imagine that a person holding a cup of coffee is working over night at an office and a tea person is often reading newspaper at Sunday afternoon. Unlike tea drinkers, coffee drinkers are more attached to their drink compared to tea drinkers. A coffee drinker must have his coffee fix every single morning otherwise he or she cannot function without it. However, a tea drinker can easily live without drinking tea for even a few days. Even though they both have caffeine inside their drink, coffee drinkers seem to be more addicted to caffeine and as time goes, they will become more dependent on
Green tea is made from the plant Camellia Sinensis’s leaves without fermentation (Suzuki, Miyoshi & Isemura, 2012) and is regarded as a popular and healthy drink in Asian countries because of its health-promoting potentials such as protecting against cancer and cardiovascular disease (Harvard Health Publications, 2012; Iwasaki et al., 2014). Lots of the positive effects are due to the antioxidative activity of (-)-epigallocatechin gallate (EGCG) which is a major component of green tea (Suzuki et al., 2012). And it draws researchers’ interests and attentions to further investigate. According to Suzuki et al., one example of the health advantages is that catechins in green tea bring an anti-obesity effect by stimulating lipid metabolism in liver (2012).