What we don't know about decaf coffee According to studies, caffeine in large quantities damages the nervous system, can contribute to the body's oxidation and negatively affect the heart and blood vessels, not to mention increase blood pressure. Drinking more than 2-3 cups of coffee a day is already a certain health risk.For this reason, many people switch to decaf coffee. It is believed that this drink provides almost no caffeine. However, the opposite is true. Large doses of caffeine significantly increase the likelihood of smoking, as well as other respiratory diseases.The main thing. It is very important to know that most medicines are only effective in very limited quantities and for special situations. So, unless you are prescribed it, do not add large doses of non-standard products to your coffee. This article is for informational purposes only. Please consult your doctor before using this information.If you liked our article, we will be happy if you share it on your social media pages.