Gene Stratton-Porter's Biography. American feministâ photographerâ one of Indiana's most famous female authors. Stratton-Porter's moralistic and romantic novels have been translated among others into Finnish and Swedish. By the time of her deathâ her books sales had topped ten million copies.
That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two energy shot drinks. Although caffeine use may be safe for adults, it's not a good idea for children. And adolescents should limit themselves to no more than 100 mg of caffeine a day.Even among adults, heavy caffeine use can cause unpleasant side effects. And caffeine may not be a good choice for people who are highly sensitive to its effects or who take certain medications.eavy daily caffeine use â more than 500 to 600 mg a day â may cause side effects such as: 1  Insomnia. 2  Nervousness. 3  Restlessness. 4  Irritability. 5  Stomach upset. 6  Fast heartbeat. 7  Muscle tremors.
Caffeine is classified by the Food and Drug Administration as âgenerally recognized as safeâ (GRAS). Toxic doses are usually considered anything over 10 grams per day for an adult. To put that into context, one cup of coffee contains 80â175 milligrams of caffeine depending on the bean and preparation method. So someone would need to have roughly 50â100 ordinary cups of coffee to reach a lethal dose and have a true caffeine overdose.