Hello Doc. I Am 18 years old my question is that I drank a mug of dark black coffee without sugars 3 times a day for a long time of 1.5 months like. So my doubt is does it will harm my body in any of the ways.

Dt. Nisha SinghDietitian/Nutritionist17yrs exp

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For caffeine to have side effects, you need to have atleast 8 to 10 mugs of pure coffee in concentrated form. if you are using nescafe then its a mixed roast. and even in mixed roast you need to exceed 10 cups for the side effects to kick in. if you are usuing the coffee as a preor post workout stimulant , i would suggest for green tea. more positive effects 

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