Coffee beans are packed with powerful antioxidants, the most abundant being chlorogenic acid, a family of health-promoting polyphenols Studies show that chlorogenic acid may reduce your risk of diabetes and combat inflammation. Some trials suggest it may have cancer-fighting properties as well

Health benefits of drinking coffee:

• Coffee and diabetes
• Coffee and Parkinson’s disease
• Coffee and chronic liver disease or cancer
• Coffee and other liver diseases
• Coffee and heart health
• Coffee and obesity

Side effects:

Although consuming caffeine may offer some benefits, there can be negative side effects if a person drinks too much of it. These side effects may include:
adverse interactions with particular, medications such as certain psychiatric drugs, thyroid medications, heartburn drugs, and antibiotics
Possible spinal bone loss in women who drink more than 300 milligrams (mg) per day and who do not consume enough calcium
Gastrointestinal problems
An increase in blood pressure
An increase in the risk of myocardial ischemia, which is a type of heart disease, if a person consumes coffee during exercise
fertility difficultiesTrusted Source
negative effects on a growing fetus, such as low birth weight, if a person consumes a large amount of coffee during pregnancy
Irritability and insomnia in nursing infants, if a person consumes coffee during lactation
dehydration, but this is not conclusive and may be limited Trusted Source to excessive caffeine consumption
Worsened symptoms of certain mental health conditions, such as schizophrenia or bipolar disorder
an increased risk of suicide
coffee-specific disordersTrusted Source, which include:
caffeine intoxication (or overdose)
Caffeine-induced anxiety disorder
Caffeine-induced sleep disorder (or insomnia)