Is cigarette filter really useful?

Cigarette filters are really useful. Cigarette filter mainly absorbs nicotine, tar and other substances to reduce harmful substances from entering the human body. However, although the filter contains adsorbents such as activated carbon, which can adsorb some harmful substances, it does not mean that the filter can completely eliminate the risk of smoking. Smoking is still dangerous because it can lead to various health problems, including but not limited to cardiovascular and cerebrovascular diseases, cancer and respiratory diseases. Cigarette filter, also known as filter cigarette holder or healthy cigarette holder, aims to filter out most harmful substances in cigarettes, such as tar and some chemicals, thus protecting the health of smokers to some extent.