Is nicotine toxic?

Nicotine is toxic.

We usually smoke, not all at once to smoke all the toxic substances in the lungs, about 50% of the nicotine with the smoke diffused into the air, which was smoke in the formaldehyde and part of the 5% with the cigarette was thrown away, 25% was burned to destroy, only 20% was absorbed by the body.

The dose of nicotine inhaled through smoking cigarettes is very small, and the half-life of nicotine in the human body for two hours, and can soon be metabolized by the body. As a rule of thumb, smokers naturally stop smoking when they smoke continuously until they don't want to. This is also a protective mechanism against nicotine poisoning. Nicotine is the main substance that causes tobacco dependence.

Expanded Information

The weight control standard for cigarettes is usually measured in hundreds of cigarettes, and the general weight of a hundred cigarettes needs to be controlled at 92 grams plus or minus 2 grams, with different control standards for different brands, but not a lot of difference, basically about 1 gram, which is converted into single cigarettes with a weight standard of 0.92 plus or minus 0.02 grams, which includes the tobacco, filter stick, and other components. This is the total weight of cigarettes, filter rods, rolling papers and caffeine paper, and the weight of cigarettes is about 0.75 grams for a single cigarette if you count the cigarettes alone.

Taking into account the combustion and airborne consumption during smoking, only about 20 percent of the nicotine in each cigarette is inhaled by the human body. The total weight of an 84mm standard length cigarette is about 0.92 grams, of which the tobacco is about 0.75 grams. The nicotine content in baked tobacco is about 1.5-3.5%, too big end too strong, too small strength is not enough, the optimal amount is about 2%.

Through calculation, it can be learned:

The nicotine content of each cigarette is about: 0.75 x 2% (take the middle value of the nicotine content of the tobacco) = 0.015 grams = 15 milligrams.

The amount of nicotine that enters the body after smoking each cigarette is: 15 mg x 20% = 3 mg.

Nowadays, in tobacco control campaigns, smokers are generally told that the lethal dose of nicotine to a person is 50-70 milligrams. The way the example is taken is that such a dose of nicotine is injected into a vein at once. This is a completely different approach from smoking, which inevitably produces a lethal effect. The dose of nicotine ingested from smoking cigarettes is safe.

Baidu Encyclopedia - Nicotine