Tobacco comes from a large-leafed nightshade, or Solanaceae, plant. It is one of a few plants containing the psychoactive alkaloid, nicotine. In liquid form, nicotine is a lethal poisonâ€”the injection of one drop would be deadly. It is the nicotine that has the addictive properties, not the smoke. Many pesticides and chemicals are added to tobacco, which break down to radioactive compounds like Radium, Polonium 210, Strontium 90, and Uranium in the body.It’s theorized that these chemical additives are responsible for the many health problemsâ€”chiefly cancerâ€”associated with tobacco use, as radiation is known to cause cancer.During withdrawal, take about 1 gram of vitamin C (buffered to protect the stomach) every one or two hours. This may help reduce nicotine cravings. Smokers tend to be deficient in many B vitamins, so make sure to supplement them in liquid or sublingual form while withdrawing. Other helpful nutrients include magnesium, selenium, zinc, molybdenum, copper, vitamin E, and L-cysteine.