The e-liquid strength you choose will depend on personal preference. Our e-liquids range from 0mg-18mg. 0mg is nicotine free, 3mg is the lowest level nicotine you can get in an e-liquid, and 6mg is considered a low-level nicotine strength too. 12mg is a similar strength to conventional cigarettes, and 18mg is our highest nicotine strength, suitable for experienced vapers that are looking for a more intense vaping experience.