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Coffee is the go-to drink for millions around the world. Though drinking coffee makes you feel fresh and energetic, there are a few side effects associated with its excessive consumption. The negative effects of coffee are mainly due to the presence of caffeine and tannic acid.

Adverse Effects of Coffee Consumption
  • It heightens the energy levels for a short while. But after some time, a cup of coffee won't work as it used to. Hence, you will tend to increase the intake which may further develop into an addiction. This will also lead to adrenal exhaustion.
  • A person on medication should avoid coffee, as it may interfere with its working.
  • Caffeine interferes with a brain chemical named adenosine which helps in providing a calming effect.
  • Coffee might also give rise to constriction of blood vessels. This condition occurs due to the increase in the cortisol levels.
  • Young children should not be given coffee as it is difficult for them to digest it. Their liver cannot metabolize caffeine and hence, it remains in the body for 4 to 5 days. This can lead to sleeplessness and irritability.
  • Pregnant women should avoid it as it might lead to birth defects, miscarriage, premature birth, and low birth weight.
  • Another negative effect of drinking coffee is that it can lead to sluggish sperms and thereby reduce fertility.
  • Coffee can damage the teeth, causing them to become discolored and stained.
  • It even increases the blood sugar level. Hence, people with diabetes should avoid it. Research tells us that excess coffee causes deprivation of sleep in several individuals.
  • Coffee is known to alter blood pressure and heart rate as well. It even leads to frequent urination. It is known to disturb the absorption of essential minerals and nutrients which are required for the functioning of the body. This can cause adverse effects, and can lead to diseases which are caused due to the lack of these minerals. Vitamin A, B, and C are the ones which are most affected. Along with this, the absorption of minerals like iron, zinc, and calcium are also affected due to its consumption.
If taken in moderate amount, coffee will not cause an adverse effect on the body. It's fine to consume it occasionally on moderate basis but excessive consumption should be strictly avoided.