British soul singer Mica Paris, who came in the spotlight in the 80s, revealed that she started her career out by living only on a diet of "coffee and cigarettes," after her weight was criticized. With a lot of people getting hooked on the combination of caffeine and nicotine nowadays, what dangers does the combo present?

Paris told Britain's Daily Mirror that she got into the diet of coffee and cigarettes at the age of 23, when a record label executive told her that she looked like two persons in one body, according to ContactMusic.com. Feeling the pressure to be thin, she became slim by existing on just coffee and cigarettes alone.

Too much caffeine is already bad for one's health and so is too much nicotine, so what could possibly go wrong with the combination, right?

Breaking it all down first, coffee can be considered the beverage of choice among millions of people around the world. With its immediate effect of perking one up, its caffeine content is what makes drinking too much risky. For adults, a moderate amount of coffee would be 200 to 300 milligrams, which is two to three cups, according to Mayo Clinic.

However, when consuming more, specifically more than 500 to 600 mg a day, it may cause people to experience insomnia, nervousness, restlessness, irritability, stomach upset, fast heartbeat, and muscle tremors.

For smoking cigarettes, the warning that cigarette smoking gives already proves how dangerous it already is. But stripping it back to basics, cigarettes' nicotine content raises both heart rate and blood pressure, according to Stop-Smoking-Tips.com. Though it is true that it can relax those who puff them, after some time, the smoker will feel less alert, and more irritable.

Additionally, smoking cigarettes can cause numerous adverse health effects like lung cancer, respiratory problems, and heart diseases, as evidenced by the number of deaths related to smoking every year.

So what if the two were taken in too much? Since having one of them already poses enough danger on their own, the combination of the two could lead to a number of different negative effects.

The combo of caffeine and nicotine, which act as a stimulant in the body, may cause insomnia. Both can also cause addiction, and if not, may cause unpleasant withdrawal symptoms such as headaches and fatigue when stopped. Anxiety and nervousness will also be apparent when the caffeine and nicotine fix is not given.

And in the case of Paris, who was living off of them alone, the risk of deficiencies in nutrition is highly probable. So what's the lesson behind her the singer's revelation? A man cannot live on coffee and cigarettes alone.