While both green tea and black tea come from the same Camellia Sinesis plant; green tea encounters less abuse in the preparation process. It’s steamed and dried quickly thus leaving the leaves  green. White tea is green tea less the caffeine. Caffeine by the way is what gives coffee and tea its bitter taste. Steep your tea for shorter periods of time taking off the bitter edge. Dedicated tea drinkers will advise you steep no longer than ninety seconds.  

The health benefits are:

Benefit

Why

Reduced risk of cancer

  • Breast
  • Colon
  • Esophagus
  • Prostate
  • Skin Cancer
  • Stomach

Antioxidant’s polyphenols, flavonoids and epigallocatechin gallates a.k.a EGCG which has one special property in that it not only is theorized to stop growth of new cancer cells (blocks tumor enzyme), it is thought to also kill existing cancer cells while not harming health cells.

Carotene

Lowers hypotension – Low Blood Pressure

Antioxidant’s polysaccharide  & polyphenol

Increased Calorie Burning

Saponins stimulate metabolism

Bolsters Immune System

Antioxidant’s polyphenols, flavonoids

Reduces risk of heart attack and stroke

Polyphenolic catechin improve cardiovascular system preventing blood clots, dilates brachial arteries short term

Treats hypoglycemia (low blood sugar)

Polysaccharides increases insulin sensitivity

Type-two diabetes

Decreased glucose levels inhibit cataract formation preventing and relieving type-two diabetes.

Anti-aging properties

Polyphenolic catechins destroy free radicals.  Vitamin C maintains skin.

Helps with allergies

Saponins block receptors that produce allergic reactions

Reduces hypertension a.k.a. high blood pressure

Theanine (amino acid) and catechin relaxes blood vessels

Lowers bad cholesterol (LDL’s)

Antioxidant flavonoid

Raises good cholesterol (HDL’s)

Antioxidant flavonoid

Prevents tooth decay

Fluoride’s antibacterial properties strengthen tooth enamel  

 

 

The Key To Green Tea.  
Ice cold green tea is virtually useless. You need to drink it hot or freshly brewed before the nutrients become inert. Personally I'll drink cold water from the corner grocery before cold green tea. Cold green tea is just another sugar drink. Drink it hot if you want it's benefits.
Hot and cold green tea
Too Much Of A Good Thing Is A Bad Thing
In addition don’t prepare tea with boiling water, very hot water is sufficient. The higher quality green tea used the lower the temperature. High grade green tea should be infused at approximately 60 degrees Celsius to 140 degrees. If you are using bagged green tea the temperature would be as high as 180 degrees (still not boiling). Again steep time is approximately 90 seconds unless you want a more caffeine with that bitter taste. Different tea’s have different ideal steeping times.

You’ll notice that ECGC (Epigallocatechin Gallate) is mentioned in the table above. It's thought to be the metabolism kickstarter. Research touts it as a big deal antioxidant.  However be advised that after drinking a single glass of hot green tea, less than 5 percent of ECGC ever makes it through your liver into your bloodstream. But hey  5 percent is better than zero percent.

Like most anything either bad or good for you, consistency and moderation are important factors in success. You have to drink a lot, but not too much. You have to drink on a steady basis.   

I’m big on resveratrol which is in red wine. It is highly regarded for its own anti-oxidants (anti-aging properties). I’ve been watching the news over the past few years seeing that a time is fast upon us when that important ingredient is placed in a health pill so you do not have to consume red wine in order to gain its health benefits. Fortunately if you do consume a good amount of green tea (fresh-brewed of course), studies reveal the anti-oxidants in green tea are twice as strong as resveratrol.  

RESOURCES: PUBMED: http://www.ncbi.nlm.nih.gov/pubmed/12118006?dopt=Abstract

European Journal of Cardiovascular Prevention and Rehabilitation, Dr. Nikolaos Alexopoulos