Damaging Effects of Tea and Coffee Consumption


  1. Anti-thiamine action and thiamine inactivation. This means that tea blocks the action of Vitamin B1.
  2. Contains fluorine at substantial levels and also fluor-aluminium complexes.
  3. Inhibits absorption of iron, especially from cereals. High levels of Vitamin C minimize this action.
  4. Has a diuretic action, which, as a consequence, upsets Na/K balance in favour of sodium.
  5. There is some evidence of carcinogenic effects from tea tannins.
  6. Tea tannins affect the heart and can cause heart-muscle lesions in rats.
  7. Some statistical evidence links tea-drinking in expectant mothers with congenital abnormalities in their babies


  1. Affects stomach secretions, including HCI - stomach acid.
  2. Affects acid/base equilibrium in the body.
  3. Upsets electrolyte balance, especially Na and K and upsets water balance - a definite diuretic.
  4. Like tea, has anti-thiamine action.
  5. Increases atherosclerosis.
  6. Affects behaviour.
  7. Gives rise to methylitrosourea that may be a cause of bladder tumours.
  8. Adversely affects blood fatty acids and blood sugar control.
  9. Some work suggests a link with teratomas, ie tumours of the unborn foetus.
  10. Has been linked with duodenal ulcers.
  11. Has a mutagenic action. ie causes abnormal germ cells - viz sperm and ova.
  12. Inhibits iron absorption.
  13. Produces nitrosamines, which are known cancer-causing agents.
  14. Statistically, high coffee consumption is correlated to the incidence of carcinoma of the pancreas.
  15. De-mineralises the tissues.

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