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Green Tea, Black Tea – (Camellia sinensis)

Green Tea

Green tea and black tea have been used as a beverage for over 4,000 years and both come from the very same plant. What makes them different is how the mature leaves are processed after harvest. All the mature leaves that are harvested are withered at first. Then those that are destined to be herbal tea are steamed or panfired and then dried. The leaves destined to become black tea are rolled, fully fermented (Oolong tea is only partially fermented), fired and finally dried.

Key Medicinal Uses

Internally – Tea has been a part of the daily routine in China for centuries. Green tea is antibacterial and contains antioxidants. It is effective at preventing and may play a role in curing some cancers. Tea can lower cholesterol, reduces platelet clumping in the blood and lowers blood pressure. It can stimulate the immune system and help prevent dental plaque. Tests have shown that black tea consumption can reduce your risk of stroke. It can help lower cholesterol levels and reduce heart attack risks.

Externally – Green tea acts as a styptic when applied to bleeding wounds. When applied on open wounds, acne, sunburn and athlete's foot, it protects the skin from further damage.

Parts Used

Leaves – The leaves of the plant are used to make tea or they can be dried and powdered to put into capsules.


Both green and black tea contains caffeine, unless you are drinking decaffeinated varieties. If you are sensitive to caffeine or are pregnant or have another condition where you should avoid caffeine exposure, either don't drink tea or find a decaffeinated version. If you take MAO inhibitors, a type of antidepressant, you may want to avoid caffeine as well. Side effects of caffeine sensitivity include insomnia, nervousness, frequent urination, increased heart rate and blood pressure. Excessive tea consumption can cause nervous irritability or aggravate ulcers.

If you suffer from anxiety, a weakened cardiovascular system, hyperthyroid or kidney disease, you should not drink tea unless your caregiver is sure it won't interact with your condition or any medications you take. Tea may cause asthma to get worse.

If you take blood thinners, green tea especially may be a concern since it contains a large quantity of vitamin K. Either avoid it altogether, or drink a similar amount every day so you can adjust your medication to the increased level of vitamin K in your diet.

Preparation and Dosage

A daily dose of green tea extract is normally 100 to 150 mg three times per day. Four to six cups of tea can be drunk per day.

Green Tea Herbal remedies Top