The nicotine alone, being injested by vaping is the same as being injested through smoking. Nicotine isn’t the problem though, Nicotine is proven to be about as harmless as Caffeine to our bodies.
Some benefits to Nicotine are, improving motor skills and memory functionality, Nicotine is used to lessen the symptoms of Tourette Syndrome and has been known to assist in preventing Alzheimers Syndrome.
Nicotine is about as addictive as Sugar, where our bodies to crave it, although the cravings are short term, and only last up to a week, to 2 weeks in some extreme cases.
The difference between injesting Nicotine through vaping, and injesting through traditional methods such as Tobacco, or Smoking Cigarettes, is the purity of the Nicotine, and the attached chemicals too it. Located here: https://www.crazygoatvapes.com.au/blogs/news/what-chemicals-are-actually-in-cigarettes is a list of chemicals found in Cigarettes, as published in 1994 by the 5 major tobacco companies.
With vaping, you are subject to 4 key chemicals. Propylene Glycol, Vegetable Glycerine, Nicotine and Food Flavourings. All products with vaping are approved with the (United States Pharmacopeia (USP) Grade, which has been deemed safe for food, drug or medicinal use.
Propylene glycol is also used in various edible items such as coffee-based drinks, liquid sweeteners, ice cream, salad dressing, whipped dairy products and soda.
Vegetable Glycerine, or Glycerol is found In food and beverages, glycerol serves as a humectant, solvent, and sweetener, and may help preserve foods. It is also used as filler in commercially prepared low-fat foods (e.g., cookies), and as a thickening agent in liqueurs. Glycerol and water are used to preserve certain types of plant leaves. Vegetable glycerin metabolizes differently than sugar and is used in low carbohydrate foods for sweetness and moisture. Unlike sugar, glycerin does not contribute to tooth decay. Many household products, including lotions, shampoo, and toothpaste, contain vegetable glycerin.
So, to summarize, Nicotine isn’t the bad part of cigarettes, it’s the thousands of other chemicals, so when using Nicotine in e-Cigarettes, it is a HELL of a lot cleaner.