I think it would require a little more research. This FDA source feels a bit like propaganda on the war against tobacco to me. Even grapes, apples and pears have been found to have arsenic in them. Root vegetables are especially prone to drawing up pesticides and other things in the soil, but nobody is questioning putting carrot in their soap (that I know of). It's also the Dose that makes the Medicine or the Poison. Anyway, for what it's worth, I think it sounds like an interesting idea that just warrants some more research.
That's incorrect, and dangerous. Nicotine was recognized as a strong contact poison long before anyone had any inkling of cancer or addiction.
Here's info from a chemical industry firm, to start:
"Nicotine is one of the most toxic of all poisons and has a rapid onset of action. Apart from local caustic actions, the target organs are the peripheral and central nervous systems.
Summary of clinical effects
Burning sensation in the mouth and throat, salivation, nausea, abdominal pain, vomiting and diarrhoea. Gastrointestinal reactions are less severe but can occur even after cutaneous and respiratory exposure. Systemic effects include: agitation, headache, sweating, dizziness, auditory and visual disturbances, confusion, weakness and lack of coordination..... In severe poisoning, tremor, convulsions and coma occur. Faintness, prostration, cyanosis and dyspnoea progress to collapse. Death may occur from paralysis of respiratory muscles and/or central respiratory failure.
Nicotine (PIM)
and there's this:
Green Tobacco Sickness - Overview | Occupational Safety and Health Administration
https://www.osha.gov/green-tobacco-sickness
"Nicotine exposure from handling tobacco leaves may cause nicotine poisoning, also called Green Tobacco Sickness (GTS), with symptoms including nausea and vomiting. Risk of nicotine poisoning increases when the nicotine contained in the tobacco leaves mixes with rain, dew, or sweat, allowing nicotine to get onto the skin and pass into the bloodstream more easily."
and also
"Nicotine is an acute toxin that can cause vomiting, seizures, respiratory failure, and death if consumed in even a small dose. For example,
one teaspoon of a solution with a nicotine concentration level of 1.8 percent could be fatal to a 200-pound person. A considerably smaller amount would be fatal to a child."
Preventing Nicotine Poisoning Among Children and Youth | Public Health Law Center
https://www.publichealthlawcenter.o...g-nicotine-poisoning-among-children-and-youth--
How much nicotine kills a human?
https :// ww w.ncbi.nlm.nih.gov/pmc/articles/PMC3880486/
Thus, a careful estimate suggests that
the lower limit causing fatal outcomes is 0.5–1 g of ingested nicotine, corresponding to an oral LD50 of 6.5–13 mg/kg.