Don’t drink more than one cup a day if you’re pregnant. Studies on coffee's effect on a fetus have been controversial, but one thing is sure: if you drink coffee when pregnant, caffeine will also reach the fetus, and your baby is highly sensitive to caffeine. So, if you’re a heavyweight coffee drinker and can’t stop drinking it while pregnant, at least reduce your coffee intake to one cup a day.
If you have high cholesterol please choose filtered coffee. Coffee beans contain cafestol and kahweol, two ingredients that appear to raise LDL cholesterol levels. Filtering the coffee traps most of the LDL, but cafestol and kahweol are found in espresso, turkish coffee, french press and scandinavian style “cooked coffee”.
The intake of LDL from a cup of espresso is still so small, that for people with normal cholesterol levels, won't be at risk. There are also some studies at preliminary stages of diagnosis that have found marks that cafestol and kahweol may have some beneficial anti-cancer effects, and be good for your liver.
Coffee for kids, may increase bedwetting. One survey reported that caffeine consumption of 5-7 year old kids may increase enuresis a.k.a. bedwetting.