A Nicotine Booster is a concentrated nicotine solution designed to be added to nicotine-free e-liquids. It allows you to customize the nicotine strength of your e-liquid to suit your preferences. Typically sold in small bottles, nicotine boosters contain nicotine in a base of either VG (vegetable glycerin), PG (propylene glycol), or a mix of both. They are perfect for vapers who enjoy tailoring their vape experience, whether you prefer a mild hit or a stronger nicotine sensation. Simply add the booster to your nicotine-free e-liquid, shake, and vape!