It is always a dilemma to pick one when you are presented with the best two - Green Tea and Oolong Tea.

Green tea is one of the healthiest brews available on the earth and so is oolong tea. Both these teas originated in China and are made from the same plant, i.e. Camellia sinensis.

What makes them different is that they are made from different parts of the plant and by following different procedures. Yet, both these teas are worth suggesting because of their health benefits.

Difference in manufacture method

Tea field

Green tea is unfermented, black tea is fully fermented whereas oolong tea is partially fermented. Green tea is heated to stop natural oxidation then, rolled intentionally. Oolong tea is withered under strong sun and then allowed to oxidize(degree of oxidation from 8 - 85%) before curling and twisting. 

Similar ingredients in oolong tea and green tea

Ingredient Benefits
  • It reduces the risk of cancer by killing cancer cells with no harm to the healthy tissues.
  • It lowers the risk of cancer in cells of esophagus, lungs, prostate, ovary, bladder, stomach and skin.
  • It calms nervous system.
  • It fights against body movement disorder.
  • It relieves you from headache.
  • It protects brain cells.
  • It helps in burning body fat.
  • It prevents cavities and tooth decay.
  • It develops and strengthens teeth.

Health Benefits of oolong tea and green tea

Health benefits of green and oolong tea

Benefit Lowers blood sugar level
Oolong Tea
  • One of the journals published in 'Diabetes Care' in Taiwan in 2003 showed that drinking oolong tea considerably lowered the level of blood sugar. This tea is therefore considered best for diabetic patients.
Green Tea
  • Green tea aids in maintaining glucose level suspending the augment of blood sugar after mealtimes.
  • It is also preferred for its natural property of reestablishing firmness in human body.
Benefit Improves brain function
Oolong Tea
  • A Cambridge study showed that flavonoids present in oolong tea prevents breakdown of nervous system by shielding neurons against stress.
  • The caffeine present in the tea helps the brain to function properly.
Green Tea
  • Caffeine helps to perk up brain function including memory, energy levels, mood and more.
  • Caffeine also helps in burning body fat and boosting metabolic rate.
Benefit Weight management
Oolong Tea
  • A research conducted by Dr. William Rumpler, of the US Agriculture Research Services' Diet and Human Laboratory, confirmed that participants reduced 67% more calories in a day when consuming the oolong tea.
  • Oolong tea improves fat oxidation which helps in maintaining body weight.
Green Tea
  • Green tea boosts up metabolism in short period of time and helps in losing weight.
  • The fat cells burnt during metabolism produces energy, keeping you active for a long time.
Benefit Cures cancer
Oolong Tea
  • The chemical Epigallocatechin-3-gallate (EGCG) found in oolong tea have considerably free radical which protects cells from damaging.
  • The compounds also reduce growth of bacteria that results in tooth decay and oral cancers.
Green Tea
  • Green tea also has the chemical EGCG which prevents our body from different types of bacterial infections.
  • In addition, green tea has antioxidants and polyphenols; they too help to prevent cancer.
Benefit Skin benefits
Oolong Tea
  • The polyphenols present in oolong tea wipe out the free radicals and offer respite from a range of skin problems including dark spots, aging and more.
Green Tea
  • It does not only prevent wrinkles and aging but also sun damage if taken in an appropriate amount.
Benefit Healthy heart
Oolong Tea
  • Drinking oolong tea regularly reduces the cholesterol levels, lessening the risk of heart attacks.
  • Research shows that drinking 1 to 6 cups of oolong tea in a week minimizes the risk of cardiovascular diseases.
Green Tea
  • Green Tea helps to lessen the possibilities of heart problems.
  • Researchers believe that green tea works on the layer of blood vessels assisting them to stay calm.

Which is tastier: oolong tea or green tea?

The brown colored oolong tea is preferred by a lot of people for its sweet and delicious flavor while the green tea is bitter in flavor.

Side Effects of oolong tea and green tea

Both teas present negative effects if consumed in more amounts. Because higher amount of caffeine consumption present in both teas may cause headache, insomnia, vomiting, irritability, diarrhea, dizziness, etc.

Likewise, consuming too much of green tea or oolong tea increases fluoride content in your body which causes a health trouble known as fluorosis.

Research conducted

Oolong Tea

  • A Chinese study, in 1998 which surveyed on 102 females found that drinking oolong tea regularly for six weeks helped in reducing body weight.
  • The U.S. Department of Agriculture’s research reports that approximately 75 percent of the tea produced universally is black; around 23 percent is green while only 2 percent is oolong.

Green Tea

  • According to a review published in “Maturitas”, the catechins present in green tea may lessen the risk of breast, ovarian, prostate, and endometrial cancers.
  • In a study “Journal of Agricultural and Food Chemistry” conducted in 2009, it discovered that green tea holds more amount of polyphenols, antioxidant properties than in oolong tea.


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