Choose the Best Nicotine Strength & Flavor Vape Juice Nicotine Levels for Dummies Guide to DIY liquids Aer Wsale 900 mg of nicotine, equal to 45 packs of cigarettes, can be found in just ONE Lost Mary vape. Nicotine at these extreme levels can: Harm brain development in youth Not all vape products on the market meet UK standards. In the UK, compliant nicotine vapes must: Contain no more than 20mg ml nicotine Be regulated under UK TPD rules What e liquid strength should I choose? Veist Help Center