Coffee is not as harmful as many people think.

Good news for coffee lovers, drinking less than 4 cups a day will not harm your health.

According to Daily Mail, scientists came to the above conclusion after reviewing and evaluating more than 740 research works from 2001-2015 on the effects of caffeine on human health including: acute toxicity, bones, heart, brain and reproduction.

They found that an adult consuming no more than 400 mg of caffeine a day, equivalent to 4 cups of coffee, is completely harmless to health. For pregnant women, this number is 300 mg, equivalent to 3 cups.

So, if you don't regularly drink above this threshold, you don't need to worry about health problems.

Consuming more than 400 mg of caffeine a day can increase your risk of many health problems such as anxiety, heart failure, miscarriage, and birth defects. Photo: Shutterstock/Marian Weyo.

Caffeine has many beneficial effects such as stimulating excitement, reducing fatigue, drowsiness, reducing inflammation, increasing memory, cognition and reflexes. Despite its many positive effects, the most widely used stimulant in the world has long been linked to cardiovascular disease and dementia.

According to Dr. Eric Hentges, director of the International Life Sciences Institute (ILSI), this discovery provides additional valuable data and evidence, supporting future research on the safety of caffeine for health.

However, scientists also note that not only coffee contains caffeine, many foods contain a significant amount of caffeine such as: an average cup of tea contains 50 mg, Red Bull energy drink contains 80 mg per can, a small bar of dark chocolate also has up to 50 mg, or Coca Cola, a drink often considered to have a high caffeine content, contains 30 mg per can. Pain relievers are also often added caffeine to enhance the effect.

According to Zing