Thursday, 6 October 2016

How Green Tea Can Help You Lose Weight Naturally

Green tea can be used to manage weight. It contains substances which improve metabolism, as well as help the body break down stored fat. In the body, fat is stored in adipose tissue, which exists under the skin (subcutaneous fat) and around the abdomen (abdominal or visceral fat). Large accumulation of visceral fat leads to a condition described as centripetal obesity, which predisposes the body to metabolic diseases and hormonal dysregulation that ultimately leads to chronic conditions such as dyslipidemia, hypertension, type 2 diabetes, and coronary artery diseases.
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Green tea promotes weight loss, and is a much safer alternative to surgical interventions, including liposuction and gastric banding, which are used to trim down body weight, besides improving the shape and tone of the body. All that is required is that the right quantity of green tea is consumed. Research, clinical trials, and systematic reviews have shown that green tea is effective in weight management because it promotes slimming. The following is a description of how green tea can help you lose weight naturally.
Green Tea has Bioactive Ingredients that Boost Fat Metabolism
Green tea is not processed in the same way black tea is processed. Most importantly, unlike ordinary tea processing, green tea leaves are neither subjected to withering nor oxidation. As such, they do not undergo significant oxidation during drying, and this allows the tea leaves to retain considerable quantities of catechins. Catechins, also known as flavanols, are a class of bioactive polyphenols, which promote healthy energy metabolism. The principal and most useful catechin found in green tea is Epigallocatechin gallate (EGCG). The other catechins found in green tea include theaflavins, epigallocatechin, and epicatechin gallate.
EGCG stimulates the production of adiponectin, a protein involved in the regulation of fat breakdown and glucose metabolism. Adiponectin also improves the sensitivity of tissues to insulin, and this spontaneously lowers insulin resistance. The net effect is that both insulin and adiponectin are able to act on fat cells (adipocytes), and stimulate lipolysis –the process of breakdown of fat into glycerol, and its constituent fatty acids. Adiponectin and insulin also promote the release of these fatty acids and glycerol into the blood stream, where they serve as metabolites that are used by other cells for energy production.
As mentioned, adiponectin decreases tissue resistance to insulin, and this allows insulin to enter into cells, hence reducing the concentration of insulin in the serum. This triggers the release of two distinct catecholamines; norepinephrine and epinephrine. These catecholamines act on fat cells to cause release of cyclic AMP (cAMP), a second messenger, which mediates enzymatic processes of fat breakdown. These enzymatic processes involve the activation of a protein kinase, which phosphorylates and activates the hormone-sensitive lipase that ultimately cleaves the fat into fatty acids and glycerol, which are then exported out of the adipocyte into the blood stream. This ultimately reduces the quantity of fat in the fat cells, thus a corresponding decrease in the size of the cell. Accordingly, this leads to a decrease in the mass of fat tissue in the body, hence slimming.
Forskolin also aids the function of EGCG, as it activates the adenylyl cyclase enzyme, which functions to increase the cAMP levels inside cells. This increases the rate of fat metabolism.
Green tea also contains the psychoactive substance, caffeine, though in lower quantities as compared to black tea. Nonetheless, this caffeine is quite potent in stimulating the nervous system to release more norepinephrine and epinephrine. Consequently, this increases the rate of fat metabolism in the adipose tissue through the physiological processes described above.
Antioxidants in Green Tea attenuates the Oxidative Stress on the Body
In a research published in the journal Molecules, green tea was shown to contain potent polyphenolic antioxidants, which reduce the oxidative stress brought about by accumulation of reactive oxygen species (ROS). ROS causes cell damage as well as increases the degree of insulin resistance in the body. This leads to reduced fat metabolism, and increased gluconeogenesis – formation of glucose from non-carbohydrate sources - which eventually spares the fat in adipocytes, in addition to increasing the quantity of fat stored in visceral adipose tissues.
Likewise, oxidative stress contributes to neurodegenerative conditions, and chronic conditions such as rheumatoid arthritis and Parkinson’s disease. It is also implicated as one of the causes of the complications associated with diabetes. In relation to obesity, oxidative stress accelerates the development of dyslipidemias, which ultimately leads to development of cardiovascular conditions.
Hyperlipidemia is the most common form of dyslipidemia – a condition characterized by abnormal serum lipid levels. Oxidative stress promotes the oxidation of LDL (low-density lipoprotein), which triggers the formation of plaques inside arteries that eventually leads to atherosclerosis. Moreover, LDL oxidations disrupts normal fat metabolism, thus causing erratic energy metabolism that can result in morbid obesity and development of metabolic syndrome.
Green tea has flavanols that act as anti-oxidants, which not only reduces the oxidative stress, but also promotes fat metabolism, hence decreasing the mass of abdominal fat. This results in slimming.
Green Tea promotes Fat Catabolism during Physical Exercise
In a published study about the effect of green tea consumption on exercise physiology; it was shown that consumption of green tea improved glucose tolerance and insulin sensitivity during moderate-intensity exercises, and this increased the rate of fat catabolism (breakdown) by about 17%.
Another published study showed that green tea consumption increased the rate of fat catabolism during exercise, as well as during rest. Systematic review of medical literature also shows that green tea contains extracts that possess catabolic properties, and which streamline the processes of lipid metabolism.
Green Tea and Satiety
Satiety is the physiological sensation of being full. Green tea contains extracts which reduce appetite, and this allows you to feel full. This also reduces your intake of calories. Accordingly, the decrease in calorie intake stimulates fat catabolism in your body, and this means that you will burn more fat than usual. Ultimately, this reduces the amount of visceral fat, and your body gradually acquires a slender tone as you slim down.
Take-home Message

In conclusion, green tea can be used for weight management as it contains bioactive substances, called catechins, which promote fat metabolism. Research, clinical trials, and systematic reviews have shown that catechins modulate lipid and glucose metabolism, so that a greater proportion of fat is metabolized. This reduces the size of the adipose tissues, in addition to improving insulin homeostasis. Hence, green tea helps you slim down, as well as improves your physiological health.

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