The short answer is yes: most vape juice contains nicotine. New users sometimes assume an e-cigarette is nicotine-free, and that is a mistake. Nicotine is not in the device itself. It is in the cartridge or the e-liquid you put in it, and the amount matters.
With e-liquid you pick how much nicotine you take in, but only if you understand how strength is labelled.
How nicotine strength is labelled
The strength on a label tells you how much nicotine is in one mL of juice. Some brands print it as a percentage instead, and 1.2% is a typical example of that style. The label states what the bottle contains, so read it before you buy.
Nicotine-free e-liquid is available as well. At the other end, some products carry much higher strengths, and those are recommended only for experienced users.
Strength is a separate thing from bottle size. Size only tells you how much liquid you are getting, and the common ones are:
Picking a strength
The right level is a matter of personal preference. Three things are worth thinking about.
Whether you smoked before
People who come to vaping from cigarettes often lean toward higher strengths, simply because that is the amount of nicotine they are used to. If you have no smoking background, start low. A strong juice is likely to taste unpleasant to you and could put you off vaping altogether.
How you vape
Think about your pattern of use. Some people take a few long drags a day, and others take short puffs often. Lower strengths suit frequent short puffs because each one is less potent. If you favor long drags, a high strength may leave you dizzy or nauseous.
Throat hit
More nicotine means a harder “hit” on the inhale, which in practice means it is more likely to irritate your throat or lungs. Lower strengths are usually smoother. New users should begin low and move up only if they find they want to.
Summing up
Most e-liquid has nicotine in it, the label tells you how much, and vaping is more enjoyable once the strength matches your preferences. If anything here is unclear, get in touch and we will answer your questions.