With increasing stress, coffee has become the popular beverages choice across different group of people. Coffee is rich in caffeine and various research concluded that the half life of caffeine is nearly 6 hours. So, if an individual grab a coffee at 6PM in evening, it will take 6 hours to deplete half of the caffeine present in the body and another half in another six hours and so on. This slow rate of depletion may have very lasting effects on human body.

People drinks coffee to relieve fatigue and increase alertness. However, different studies across globe shown that high amount of caffeine in human body may lead to headache, anxiety, restlessness, stomach upset, nausea, vomiting, elevated heart rate and breathing pattern, insomnia etc. (1, 2)

7 Side Effects of Coffee


In this fast life people always need to have some extra time to finish what they have on their plate and the cheapest substitute to their extra time is large and strong, cup of coffee. As we have known the half-life of caffeine if six hours. So, if someone is having coffee somewhere close to 8-9PM, it’s almost impossible to sleep before 2-3AM on the next day. Which may cause fatigue in the morning due to less and unpleasant sleep. This may again call for morning coffee and the sow will keep on running. 

Stomach Upset

Large quantity of coffee may aggravate pre existing digestion related ailments and especially if someone is having black coffee. Prolonged use of heavy dose of coffee causes gastrointestinal discomfort like heart burning and acidity. The most common is acidity which is primary cause of several life-threatening diseases. One should always avoid having black coffee before breakfast.

High Blood Sugar

Caffeine affects people differently. It almost has negligible effects on non-diabetic individuals while it may be of serious concerns for the individuals diagnosed with diabetes. On average a young adult consumes around 240 mg of caffeine which will not have any impact on consumer while an average of 200mg per day may be detrimental to diabetic people.  Different studies suggest that caffeine intake can increase the blood sugar level in type 2 diabetes people. If you have difficult controlling blood sugar one may opt for decaf to avoid any medical interventions.

High Blood Pressure

High caffeine intake may cause temporal increase or spike in blood pressure even though you are not diagnosed with blood pressure symptoms. It’s not quite certain why such spike in blood pressure after having coffee. But some researchers believe that high caffeine level changed the hormonal balance in the body especially adrenaline. This hormone is responsible for elevated blood pressure. It is observed that the individuals having large quantity of caffeinated drinks have relatively higher average blood pressure. If this type of signatures is observed for a specific individual one should avoid using caffeinated drinks before intense activity which might elevate blood pressure temporarily.

High Cholesterol

Cup of coffee may be harmful if you have high cholesterol level. Coffee beans contains substances like cafestol and kahweol and these ingredients are known for raising LDL cholesterol in human body. Although the quantity of LDL in coffee is very less, it will not be a health risk for people with normal LDL level, but it may have detrimental effects with high LDL individuals. In order to avoid such circumstances, people with high cholesterol should prefer filter coffee where LDL gets separated as filtrate rather than espresso which contains LDL.

Anxiety Disorders

Caffeine is known for raising the anxiety level by increasing the adrenalin level, responsible for increasing energy at the same time increasing alertness by blocking adenosine which makes you feel tired. Caffeine-induced anxiety may worsen the pre-existing anxiety disorders.

Bone Loss

Osteoporosis or bone thinning is very common in elderly people, but it is also observed in younger adults with high caffeine intake. Caffeine rich drinks increase the calcium in the body which gets discharged through urination process leaving the body with little less calcium every time we complete the cycle. Incase of pre-existing osteoporosis situation one should avoid having caffeine intake of more than 400mg a day and try to have calcium rich foods and supplements. Postmenopausal women with high risk of osteoporosis should be cautious with the caffeine intake which may worsen the problem.


High intake of caffeine is detrimental to health especially if you are having pre-existing health condition. People should avoid overdosing of caffeine and try to regulate the moderate amount of caffeine which will help you in fighting this fast-forward life, if possible, people should prefer filter coffee and in smaller quantities. (1, 2)