01/16/2009 Submitted in the Senate, considered, and agreed to without amendment and with a preamble by Unanimous Consent. (consideration: CR S658-659; text as passed Senate: CR S658-659; text of measure as introduced: CR S656) (All Actions)
Coffee and Tea Effects on Teeth. Coffee and tea are especially tough on teeth, because tannic acid scrapes into the pits and grooves of tooth enamel and can stain teeth. The amount of coffee a person consumes daily does affect the color of their teeth.
Thyroid Medication & Coffee. The caffeine in coffee can affect the body's ability to absorb thyroid medication. Photo Credit Creatas Images/Creatas/Getty Images. Coffee is one of the worldâs most popular beverages, used by millions as a pick-me-up in the morning, during work breaks and at the end of a meal.