ADVERSE EFFECTS OF BLACK COFFEE:
When consumed in moderation, black coffee doesn’t seem to have too many negative effects.
On the other hand, too much caffeine (from coffee or other drinks like sodas or energy drinks) lead to unpleasant side effects such as insomnia, anxiety, high heart rate, stomach pain, headaches, and nausea.
Healthy adults should aim to consume 400 mg of caffeine daily or less. If coffee is only caffeinated drink, that’s about 4 cups of coffee (960 ml).
Pregnant or breastfeeding women should limit their caffeine intake to around 200 mg daily (2 cups of coffee or 480 ml).
They be able to give a more specific recommendation on how much caffeine you should consume.
Health organizations suggest that children and adolescents drink as little caffeine as possible. There are no official guidelines for this at this time.
Some people find that black coffee irritates their stomach because it is acidic.
Caffeine also cause diuretic effects, which lead to more urine. It also pull fluid into the digestive tract, which cause laxative effects in some people.