Green Tea Extract
Green tea is a kind of tea that is prepared from Camellia sinensis leaves that have not undergone the same withering and oxidation process used to make oolong and black tea. Green tea originated in China, but its production has spread to many countries in Asia. Green tea extracts have been used in traditional Chinese and Indian medicine for a variety of uses. Green tea improves mental alertness and thinking. Green tea has positive effects on cognition, mood and human brain function.
The benefits of green tea extract are the result of the antioxidant action of nutrients called “polyphenols”. The appropriate balance of vitamins, minerals, proteins, amino acids and antioxidants works together synergistically, with each ingredient supporting and increasing the bioavailability and effectiveness of the others.
Green tea extract contains a lesser amount of caffeine than coffee, but enough to produce an effect. It also contains the amino acid L-theanine, which can work synergistically with caffeine to improve brain functioning. Green tea extract is believed to increase energy, bodily performance by mobilizing fatty acids from the fat tissues and making them available for use as energy.
The common health benefits of green tea extract include:
- Improves brain function 
- Improves overall health 
- Enhances physical performance 
- Lowers the risks of cancer 
- Helps people with Alzheimer’s disease and Parkinson’s disease 
- Improves dental health 
- Lowers the risk of infection 
- Helps people with type 2 diabetes 
- Improves heart health 
- Promotes weight loss 
- Increases longevity 
Some people take green tea extract to prevent various cancers, including breast cancer, prostate cancer, colon cancer, gastric cancer, lung cancer, liver cancer, solid tumor cancers, and leukemia, and some people also apply green tea bags to their skin to calm sunburn and hinder skin cancer due to sun exposure.
Green tea is also taken for Parkinson’s disease, diseases of the heart and blood vessels, diabetes, low blood pressure, chronic fatigue syndrome (CFS), dental cavities (caries), kidney stones, and skin damage.
How it works
Green tea extract is a powerful and wonderful metabolism enhancer and it naturally helps to increase lean body mass and lessen body fat percentage, which are both important for heart health. Green tea extract is loaded with powerful health-boosting antioxidants called catechins. These substances can reduce the formation of free radicals in the body, protecting cells and molecules from damage and premature aging. They also help support immune function, cardiovascular health, and fat loss as well as weight loss.
Green tea is not fermented and is made by steaming fresh leaves at high temperatures. During this process, it is able to maintain important molecules called polyphenols that seem to be responsible for most of the benefits of green tea.
Polyphenols might be able to relieve people of inflammation and swelling, protect cartilage between the bones, and decrease joint degeneration. They also seem to be able to fight human papilloma virus (HPV) infections and reduce the growth of abnormal cells in the cervix (cervical dysplasia). 
Green tea extract generally safe. Still, some case reports indicate that extremely high consumption of green tea extract could cause sudden heart palpitations, anxiety, headache, nervousness, sleep problems, and nauseating after taking green tea. If you experience aforementioned general weirdness, you should first seek advice from your doctor before adopting any sort of green tea-consuming habit.
Usually a daily dose of 300 – 400 mg green tea extract is recommended. You need to drink or take the proper dosage on a regular basis for significant benefits. It is suggested, “Always supplement wisely and listen to your body.”
- “Green tea”.Complementary and Alternative Medicine Guide. University of Maryland Medical Center. Retrieved 3 May 2015.