Nicotine, a chemical found in cigarettes, is thought to be a narcotic analog to heroin or cocaine. It means that nicotine does a lot of harm to human’s body. “How long does nicotine stay in your system?” is always a question that many people wonder. By answering it, human can understand how harmful nicotine is.

1.      How long does nicotine stay in your system?

Smoking is the way that causes nicotine to enter the body directly, causing serious health effects. Let see “How long does nicotine stay in your system?”, in particular, each of part of human’s body that nicotine can affect.

  • The blood

After smoking, nicotine enters the blood firstly. It not only makes man feel so comfortable, so relaxing but also stimulates the sharply rise of motivation. That are considered as ways that cause the addiction. In fact, this is the psychological and physiological dependence. To leave human’s body, it takes an extremely long time for nicotine. Nicotine starts to decrease within approximately 2 days after quitting. How long nicotine stays in your system depends on the time and intensity of your consumption.

  • Nicotine and oxygen

Nicotine causes the reduction of the amount of oxygen in the blood. That is an important element for healing. Therefore, before surgery, doctors often advise the patients to stop smoking a few weeks.

  • The urine’

Some parts of nicotine convert into cotinine when entering your body. Cotinine and other forms of nicotine are able to remain for about from 3 to 4 days in the urine. How can people detect this amount? Only by testing. Testing is the only way that helps doctors and people know whether there is nicotine in the urine or not. In some cases, they may be present for up to 20 days.

  • The hair

If you think the period of 10 hours, 4 days or 20 days is an extremely time, you will be shocked when knowing one in your hair. Until one year after stopping smoking, nicotine can still be detected in the hair. The nicotine sticks in the hair stubbornly, rather than any other systems in human’s body.

  • The saliva

So, How long does nicotine stay in your saliva? According to many health experts, nicotine can stay in the saliva for about 10 hours. At the same time, after nicotine enters the body, cotinine can still be detected for up to 4 days.

2.      Some kinds of food help the body remove nicotine

  • Cauliflower

The cauliflower has very high levels of vitamin C and B5. Vitamin C will help speed up the metabolism in the body, thus removing nicotine from your blood faster. In addition, for older smokers, the ability to absorb vitamin C is very poor, so adding a large amount of this vitamin will help the body to balance.

  • Oranges

Like cauliflower, orange is rich in vitamin C and fiber, and contains cryptoxanthin, which is useful in removing not only nicotine but also other toxins that can cause lung problems.

  • Carrot juice

Nicotine will be removed rapidly thanks to high levels of vitamin B, C, K in carrot juices. In addition, nicotine is known to be the enemy of skin, so before the removal of all nicotine in the body, your skin will be less gray and become brighter quickly.

  • Spinach

Supplementation of this vegetable is considered the most effective way to remove nicotine from the body. According to many types of research, spinach is rich in folic acid and vitamins A, C, K, magnesium … that help to lose the unpleasant odor of tobacco, preventing the formation of cancer cells.

  • Kiwi

Kiwi is rich in vitamins A, C, E. It helps supply the body with the lost nutrients during smoking, as well as removing nicotine.

  • Red pomegranate

The good news for those who want to stop smoking is to eat the pomegranate regularly, because the taste of this fruit will reduce your cravings. In addition, pomegranates help produce red blood cells in the body, fighting health problems such as blood pressure and heart rhythm disorders.

Berries such as strawberries, cherries, raspberries, blueberries… are known to be rich in vitamins and antioxidants. This will help to remove nicotine and nutrients for the body.

  • Water

After being absorbed, nicotine will dehydrate the lungs, so adding plenty of water will help moisten the lungs to prevent pitting. Also, drinking is a way to purify the toxin in the body. Furthermore, your cravings can be ignored easily by water.

Above is the answer to the question “How long does nicotine stay in your system?”. You can understand the long period as well as the harm of nicotine when staying in human’s body. Furthermore, many useful foods listed above can help remove nicotine from your system. Protecting your health is protecting your life. Let try!

Please refer the following INFOGRAPHIC:-



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