Is it safe to have black coffee early morning on a empty stomach ?

Most of the people who are used to drinking coffee on an empty stomach they don't feel any uneasiness or nervousness . But people with acidity , GERD , all the gastrointestinal disease , should not have coffee empty stomach because it increases the hydrochloric acid level in their body . So what happens is when they take coffee , the hydrochloric acid is increased too much , but when they take large meals , when the hydrochloric acid it does not release enough . So they also have digestive problems . People with inflammation and stomach ulcers should avoid drinking coffee to protect further damage to the mucus lining . Acrylamide is a cancer producing agent which is present in coffee . So people who are having problems with drinking coffee also should avoid drinking coffee and people who are having high blood pressure , hypertension , should also avoid drinking coffee because coffee causes tension and stress . Also pregnant women should avoid drinking coffee because black coffee has an agent caffeine . Caffeine increases heartbeat . So the foetus may not be able to with stand the increased rate in heartbeat . So that is why pregnant ladies should avoid drinking coffee . So stay healthy .