Heavy coffee consumption is considered to be anywhere from 500 to 600 mg per day, which is equal to about five to six cups of coffee. Up to 400 mg of coffee per day, or four cups, appears to be acceptable for most healthy adults.Continue Reading
Due to coffee's caffeine levels, excessive daily consumption can lead to side effects such as insomnia, nervousness, restlessness, irritability, upset stomach, fast heartbeat and muscle tremors, depending on the person's sensitivity. Regular coffee drinkers may be less susceptible to the side effects in comparison to those who do not drink it as often.
If someone is trying to cut back on coffee and caffeine consumption, withdrawal symptoms such as headache and fatigue are possible. Fox News recommends than any person who is experiencing these symptoms should reduce consumption gradually or switch to a decaf coffee.Learn more about Nutritional Amounts & Limits