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(8) Quit Smoking

What are tar and nicotine?


Tar is the brown, sticky substance left at the end of a cigarette filter after it is smoked. It includes additional ingredients to give cigarettes a better flavor. The by-products of smoking these other ingredients are inhaling toxic chemicals.

Tar is made up of more than 4000 chemicals; some of the more toxic chemicals include cyanide, benzene, ammonia, and methanol (wood alcohol).

Tar causes the cilia in the lungs to stop functioning. Cilia are small protrusions (like the tentacles on sea urchins) that trap and remove foreign substances from the lungs. Tar is also carcinogenic because it alters the cell’s genetic material. When the cells reproduce, new abnormal cells are created that lead to cancer. Tar leaves a brownish-yellow film on  contact.

This is responsible for the brown residue that stains a smoker’s teeth and fingers. It leaves stains in the environment where cigarettes are smoked (fabric, walls and ceilings, etc.). Filters were added to cigarettes in the 50s when it first became known that tars were potentially dangerous to one’s health as a way of trapping and reducing their amount. Later, low-tar cigarettes were also produced with a similar thought. Cigarettes were classified as high-tar, medium-tar, and low-tar by the amount of tar they contained. Low-tar cigarettes are marketed as “lights.”

Tar, nicotine, and carbon monoxide ceiling values (more commonly defined as TNCO ceilings) are international standards that many governments use to set limits on how tobacco companies may manufacture and market cigarettes in their countries. It is important to understand that different countries set different limits. These standards are based on smoking machines and not on human consumption. Because humans tend to modify the way they inhale cigarettes in order to make up for any lost flavor or nicotine amount, studies by the National Cancer Institute (NCI) have shown that low-tar or light cigarettes contain no health advantages over high-tar, or full-flavor cigarettes.

  •  High-tar cigarettes contain at least 22 milligrams (mg) of tar.
  • Medium-tar cigarettes have from 15 mg to 21 mg, and low-tar cigarettes contain 7 mg or less of tar.


Nicotine, which is named from the plant after its introduction to Europe by Jean Nicot, was first isolated in 1823, and synthesized in 1893. It is a chemical compound in a family of nitrogen-containing plant-based compounds collectively known as alkaloids. Alkaloids include many psychoactive compounds, such as cocaine, caffeine, and opium. Nicotine is found in a family of plants known as Solanaceae. The family is also informally known as the potato family, which includes a wide variety of common plants such as potato, tomato, eggplant, green peppers, chili peppers, paprika as well as belladonna (the deadly poisonous nightshade). Nicotine is predominantly found in tobacco, but in lesser quantities in some of the other plant family members, too. Nicotine can be found in non-solanaceous plants, such as in the leaves of the coca plant, which is more commonly known as the basis for the drug cocaine.

Nicotine is made in the roots and accumulates in the leaves. Its primary purpose is to repel bugs (insecticide) in order to protect itself. It was used for this purpose for many centuriesby humans as well, and nicotine derivatives continue to be widely used as insecticides to this day. It is an organic compound, which is a compound that consists predominantly of carbon and hydrogen. for nitrogen). TNCO (Tar, Nicotine, and Carbon Monoxide) Ceilings. The total upper value of the aerosol residue, nicotine, and carbon monoxide contents as measured by a cigarette smoking machine calibrated to ISO standards. This measure is used by countries worldwide to regulate manufactured tobacco products.

 Alkaloids:  Naturally occurring chemical compounds containing basic nitrogen atoms that are produced by a large variety of organisms, including bacteria, fungi, plants, and  animals



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