Can Green Tea Cause Kidney Stones or Prevent it

 Green Tea and Kidney Stones

Popular belief is that Green Tea causes kidney stones ,find here the truth why green tea causes kidney stones .Also read about advantages and disadvantages of green teas.

truth green tea and kidney stones

Benefits of Green Tea


Drinking green tea is reportedly found to have many healthy benefits.  Studies conducted indicate that green tea has abilities to lower cholesterol levels in humans thereby keeping cardiovascular problems under check; has powerful antioxidant substances that not only can successfully prohibit the growth of cancerous cells, it can also destroy cancer cells without bringing any harm to the healthy tissues surrounding them; and can improve immune levels in a habitual green tea drinker.  Green tea has been in use as a medicine in China since ancient times.

Difference between green tea and other popular teas

Now the question may arise as to what is the difference between green tea and other popular teas.  Green tea leaves are light colored and though all tea leaves are derived from the same plant genus, the manner in which it is processed is what sets it apart from other tea leaves.  Leaves for green tea are steam processed, while the rest are made from fermented leaves that converts its otherwise medicinal properties into other compounds that become less effective in preventing disease conditions.  Green tea also releases lot of caffeine when brewed.  When the leaves plucked are younger, more amounts of caffeine will be produced in the tea.  Caffeine is a bitter, colorless organic base found in almost all tea and coffee varieties which acts as a stimulant and diuretic.

Why people belief Green Tea Cause Kidney Stones

A diuretic tends to progressively produce and increase flow of urine.  This happens when water fails to be reabsorbed by the system which is later released into the urine, making it less acidic.  Minerals that settle in urine, after the body’s metabolism is complete, tend to crystallize when urine becomes concentrated and acidic.  But, in dilute urine, these minerals get dissolved totally, reducing the risk of stone formation largely.  However, teas in any form are high in oxalate content.

Oxalates are byproduct of carbohydrate metabolism and are excreted in urine where it can combine with other minerals and salts to form crystals.  If urine is highly acidic and lack in natural substances that dissolve minerals or assist in further breakdown of crystals already formed, these oxalates can combine with free calcium found in urine to form calcium oxalate stones.  Producing and passing a kidney stone is determined to be a painful phenomenon.  Small sized stones can be expelled out of the body easily with minimal or no pain.  Moderate sized stones can hinder normal passage of urine, and when the obstruction is severe, it can complicate matters even further.  Also, stones formed can either have a smooth contour or rough edges.  Jagged edges can scar the inner lining of the urinary tract during its movement giving a bloody tinge to the urine expelled, and can double the pain while getting voided along with urine.

How Green Tea Prevents formation of Kidney Stones

After several studies conducted, contrary to popular belief, it has been determined that green tea helps in preventing stone formation as well as assists in further breakdown of crystals already formed.  It appears that green tea binds itself to calcium oxalate while crystallizing to adapt into a flat shape that makes its further breakdown even easier.  Also, the oxalate content in green tea itself is increasingly less when compared to black tea variations, which makes green tea consumption less harmful for kidney stone sufferers.